TwinPast: Benchmarking Historical Evidence Use in Streaming Video Understanding with Evidence Contrastive Video Pairs
Paper • 2610.41983 • Published • 3
pair_id stringlengths 13 13 | video_a stringlengths 26 26 | video_b stringlengths 26 26 | question stringlengths 60 453 | options listlengths 2 6 | answer_a stringclasses 6
values | answer_b stringclasses 6
values | t_query float64 7.96 480 | evidence_intervals dict | last_decisive_evidence_time float64 0.5 64 ⌀ | target_event_rank int64 1 5 ⌀ | position_bin stringclasses 3
values | task stringclasses 5
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
twinpast_0001 | videos/twinpast_0001/A.mp4 | videos/twinpast_0001/B.mp4 | At the end of the earlier hand movement involving the small white laptop, was its lid open with the screen and keyboard exposed, or closed over the keyboard? | [
"Lid open, with the screen and keyboard exposed",
"Lid closed over the keyboard"
] | B | A | 37.625 | {
"A": [
[
4.333333333333333,
5.041666666666666
]
],
"B": [
[
4.333333333333333,
5.041666666666666
]
]
} | 5.041667 | 1 | Late | HSR |
twinpast_0002 | videos/twinpast_0002/A.mp4 | videos/twinpast_0002/B.mp4 | In the handheld-console demonstration, which is opened first: the black flip-out flap on the back or the narrow slot cover on the top edge near the red controller? | [
"The rear flip-out flap first, then the top-edge slot cover.",
"The top-edge slot cover first, then the rear flip-out flap."
] | A | B | 129.958333 | null | null | null | null | EOR |
twinpast_0003 | videos/twinpast_0003/A.mp4 | videos/twinpast_0003/B.mp4 | In the second animation shown, what was the shape of the last object to enter the frame from outside? | [
"A sphere",
"A cube",
"No object entered from outside",
"A cylinder"
] | B | A | 15.333333 | {
"A": [
[
5.125,
10.205
]
],
"B": [
[
5.125,
10.205
]
]
} | 10.205 | 2 | Late | AIR |
twinpast_0004 | videos/twinpast_0004/A.mp4 | videos/twinpast_0004/B.mp4 | In the first shown clear plastic bottle demonstration on the brown wooden desk beside the black notebook, before the cut immediately after that demonstration, how many complete hand releases of the clear plastic bottle were visible that made it start rolling on its side? Count a release only when the hand is shown cont... | [
"One complete release.",
"Four complete releases.",
"Two complete releases.",
"Three complete releases."
] | C | D | 84.958333 | {
"A": [
[
12.766667,
13.066666999999999
],
[
15.2,
15.666667
],
[
17.5,
17.958333333333336
]
],
"B": [
[
9.766667,
10.066666999999999
],
[
12.2,
12.666667
],
[
16.533333,
17.066667000000002
],
... | 17.958333 | 2 | Late | HAC |
twinpast_0005 | videos/twinpast_0005/A.mp4 | videos/twinpast_0005/B.mp4 | In the scene containing both a shiny green cube and a blue cylinder, how many collisions involving a sphere occur before the shiny green cube first collides with the blue cylinder? Count each new contact between a sphere and another object once. | [
"One collision.",
"Three collisions.",
"No collisions.",
"Two collisions."
] | D | A | 40.958333 | {
"A": [
[
21.3,
21.82
],
[
22.7,
23.740000000000002
],
[
24.9,
25.58
],
[
20.5,
25.58
]
],
"B": [
[
22.3,
22.86
],
[
22.86,
23.82
],
[
20.5,
23.82
]
]
} | 25.58 | 5 | Late | HAC |
twinpast_0006 | videos/twinpast_0006/A.mp4 | videos/twinpast_0006/B.mp4 | In the first scene of two people reading on a sofa, what color was the upright cushion directly behind the gray-haired man, above the long cushion lying across his lap? | [
"Golden yellow.",
"Pale beige."
] | A | B | 69.958333 | {
"A": [
[
0,
4.9375
]
],
"B": [
[
0,
4.9375
]
]
} | 4.9375 | 1 | Middle | AIR |
twinpast_0007 | videos/twinpast_0007/A.mp4 | videos/twinpast_0007/B.mp4 | In the overhead view of a keyboard in front of a wooden bench and a mottled gray wall, who was at the keyboard? | [
"A person wearing a dark blue shirt and tan pants.",
"A white-and-black robot."
] | B | A | 16.958333 | {
"A": [
[
0,
4.9375
]
],
"B": [
[
0,
4.9375
]
]
} | 4.9375 | 1 | Middle | AIR |
twinpast_0008 | videos/twinpast_0008/A.mp4 | videos/twinpast_0008/B.mp4 | At the table covered with a striped cloth, what is the second different kind of object the person holds up toward the camera? Count each kind only once, and ignore objects left resting on the table. | [
"A book.",
"A black comb."
] | B | A | 53.833333 | null | null | null | null | AIR |
twinpast_0009 | videos/twinpast_0009/A.mp4 | videos/twinpast_0009/B.mp4 | Between the pale-cloth display and the next dark-cloth display, how many complete hand claps and pen taps does the person make, respectively? Count each contact and separation once. | [
"4 claps and 3 pen taps.",
"6 claps and 4 pen taps.",
"6 claps and 3 pen taps.",
"4 claps and 4 pen taps."
] | D | C | 89.375 | null | null | null | null | MEI |
twinpast_0010 | videos/twinpast_0010/A.mp4 | videos/twinpast_0010/B.mp4 | After the separate lids have been scrubbed, in what order does the person first scrub these three container bodies with the sponge? Ignore rinsing. | [
"the clear bottle with coloured/black prints → the black handled travel mug → the white cup with a coloured printed design.",
"the white cup with a coloured printed design → the black handled travel mug → the clear bottle with coloured/black prints.",
"the black handled travel mug → the clear bottle with colour... | A | D | 480.458333 | null | null | null | null | EOR |
twinpast_0011 | videos/twinpast_0011/A.mp4 | videos/twinpast_0011/B.mp4 | In the last view before the person starts cutting the apple, is the green bowl still empty, or has chopped food already been transferred into it? | [
"Chopped food had already been transferred into the green bowl.",
"The green bowl was still empty."
] | A | B | 107.958333 | null | null | null | null | HSR |
twinpast_0012 | videos/twinpast_0012/A.mp4 | videos/twinpast_0012/B.mp4 | In the earlier clip, in what order did the person put the letters on the table? | [
"xys",
"xsy"
] | A | B | 29.583333 | {
"A": [
[
14.6,
17.4
]
],
"B": [
[
13.4,
20.1
]
]
} | 20.1 | 1 | Late | EOR |
twinpast_0013 | videos/twinpast_0013/A.mp4 | videos/twinpast_0013/B.mp4 | In the red-shirted person's demonstration at the rectangular white table, how many pushes send an object rolling freely along the tabletop? Count a fresh push and release in the return direction as another push. Exclude putting objects down, moving them while held, and direction changes after a single release. | [
"6 times.",
"7 times."
] | A | B | 130.333333 | null | null | null | null | HAC |
twinpast_0014 | videos/twinpast_0014/A.mp4 | videos/twinpast_0014/B.mp4 | In the tabletop scene between the two red-carpet scenes, how many times does the person set the cylindrical object rolling freely with a hand push or release? Count each new hand-initiated release once, including releases after a hand-held reset. | [
"2",
"1",
"0",
"3"
] | B | A | 34.791667 | {
"A": [
[
24,
27.791666666666668
],
[
24.708333333333332,
25
]
],
"B": [
[
24,
27.791666666666668
],
[
24.083333333333332,
24.5
],
[
27.5,
27.791666666666668
]
]
} | 27.791667 | 2 | Late | HAC |
twinpast_0015 | videos/twinpast_0015/A.mp4 | videos/twinpast_0015/B.mp4 | At any point in the furniture assembly shown in the video, are exactly two unattached legs lying flat on the floor to the right of the large light-brown panel? Do not count a leg held upright or attached to the panel. | [
"Yes.",
"No."
] | A | B | 64.958333 | null | null | null | null | HSR |
twinpast_0016 | videos/twinpast_0016/A.mp4 | videos/twinpast_0016/B.mp4 | Before the electric-guitar player appears, in what order are the woman playing the bagpipe and the person playing the piano shown? | [
"The woman plays the bagpipe, then the person plays the piano.",
"The person plays the piano, then the woman plays the bagpipe."
] | B | A | 26.625 | {
"A": [
[
0.75,
3.25
],
[
4.254,
16.597
]
],
"B": [
[
0,
12.427
],
[
13,
16
]
]
} | 16.597 | 1 | Middle | EOR |
twinpast_0017 | videos/twinpast_0017/A.mp4 | videos/twinpast_0017/B.mp4 | At the very start of the earlier yellow-bowl preparation segment, what was the egg mixture state? | [
"Separate round yolks were still visible in the liquid.",
"The contents were already a blended yellow mixture."
] | B | A | 87.958333 | {
"A": [
[
0,
0.5
]
],
"B": [
[
0,
0.5
]
]
} | 0.5 | 1 | Early | HSR |
twinpast_0018 | videos/twinpast_0018/A.mp4 | videos/twinpast_0018/B.mp4 | Before the final scenes of trimming the clear nail tips with scissors, in what order are the two application demonstrations shown? | [
"Only applying red lipstick.",
"Attaching a clear false nail tip using glue, then applying red lipstick.",
"Applying red lipstick, then attaching a clear false nail tip using glue.",
"Only attaching a clear false nail tip using glue."
] | C | B | 40.791667 | {
"A": [
[
7,
17.958333333333336
],
[
18,
24.791666666666668
]
],
"B": [
[
7,
13.791666666666668
],
[
13.833333333333332,
24.791666666666668
]
]
} | 24.791667 | 1 | Middle | EOR |
twinpast_0019 | videos/twinpast_0019/A.mp4 | videos/twinpast_0019/B.mp4 | In the earlier scene where the blonde woman drew on paper while holding a phone, was an open laptop beside her paper? | [
"Yes",
"No"
] | B | A | 44.041667 | {
"A": [
[
0,
5
]
],
"B": [
[
0,
5
]
]
} | 5.041667 | 1 | Middle | AIR |
twinpast_0020 | videos/twinpast_0020/A.mp4 | videos/twinpast_0020/B.mp4 | In the sewing-room introduction with turquoise shelves behind the machine, who was sitting behind the white sewing machine? | [
"A green alien-like figure with large dark eyes.",
"A woman with long dark hair and a patterned jacket."
] | B | A | 16.958333 | {
"A": [
[
0,
4.9375
]
],
"B": [
[
0,
4.9375
]
]
} | 4.9375 | 1 | Middle | AIR |
twinpast_0021 | videos/twinpast_0021/A.mp4 | videos/twinpast_0021/B.mp4 | In the last view of the orange bowl resting on the counter before the eggs are poured into the frying pan, are separate yolks still visible, or have the eggs been beaten into a blended mixture? | [
"Separate yolks were still visible.",
"The eggs had been beaten into a blended mixture."
] | B | A | 66.958333 | null | null | null | null | HSR |
twinpast_0022 | videos/twinpast_0022/A.mp4 | videos/twinpast_0022/B.mp4 | In the earlier music scene against a red brick wall, what color was the outer garment covering the foreground violinist's shoulder nearest the camera? | [
"Dark green",
"Bright blue",
"White",
"Dark brown"
] | D | A | 49.541667 | {
"A": [
[
14,
19
]
],
"B": [
[
14,
19
]
]
} | 19 | 2 | Late | AIR |
twinpast_0023 | videos/twinpast_0023/A.mp4 | videos/twinpast_0023/B.mp4 | In the earlier makeup close-up, what was on the wall to the right of the seated woman? | [
"A bright illuminated oval mirror",
"A round gold-colored clock"
] | B | A | 35.958333 | {
"A": [
[
0,
0.9583333333333334
]
],
"B": [
[
0,
0.9583333333333334
]
]
} | 0.958333 | 1 | Middle | AIR |
twinpast_0024 | videos/twinpast_0024/A.mp4 | videos/twinpast_0024/B.mp4 | Before the scene with red tape, in what order were the notebook and the fabric case placed into the box during the earlier packing? | [
"The fabric case first, then the notebook.",
"Neither item was placed into the box.",
"The notebook first, then the fabric case.",
"They were placed into the box together."
] | C | A | 23.166667 | {
"A": [
[
0.4228395061728394,
2.433141474808141
],
[
2.4248415081748416,
4.902277277277277
]
],
"B": [
[
1.336407069593398,
2.9483520430323074
],
[
2.5391734322274564,
4.217938759146036
]
]
} | 4.902277 | 1 | Middle | EOR |
twinpast_0025 | videos/twinpast_0025/A.mp4 | videos/twinpast_0025/B.mp4 | After the bread is unpacked, what does the woman first use the knife for, and how does she apply the next ingredient to the bread? | [
"Spreading on the bread; applying ingredients with the knife.",
"Cutting the roll open; applying ingredients with bare fingers.",
"Spreading on the bread; applying ingredients with bare fingers.",
"Cutting the roll open; applying ingredients with the knife."
] | D | C | 73.958333 | null | null | null | null | MEI |
twinpast_0026 | videos/twinpast_0026/A.mp4 | videos/twinpast_0026/B.mp4 | In the earlier clip, what was the order of the letters at the beginning? | [
"alic",
"ical"
] | A | B | 51.916667 | {
"A": [
[
0,
18.133
]
],
"B": [
[
0,
15.33
]
]
} | 18.133 | 1 | Early | HSR |
twinpast_0027 | videos/twinpast_0027/A.mp4 | videos/twinpast_0027/B.mp4 | In the first room scene, before the separate clothes-folding scene, what did the person do with the light upper garment, and what did they open afterward? | [
"Took the garment off and put it down, then raised a laptop screen to open it.",
"Entered already carrying the garment and put it down, then raised a laptop screen to open it.",
"Entered already carrying the garment and put it down, then unfolded a newspaper.",
"Took the garment off and put it down, then unfo... | C | A | 37.958333 | {
"A": [
[
4,
10
],
[
12.5,
21
]
],
"B": [
[
0,
15.5
],
[
24,
27
]
]
} | 27 | 1 | Middle | MEI |
twinpast_0028 | videos/twinpast_0028/A.mp4 | videos/twinpast_0028/B.mp4 | At the end of the earlier decorated wooden box demonstration, before the later scene with a woman holding another wooden box, how was the earlier box’s lid left? | [
"The lid was open.",
"The lid was closed."
] | A | B | 14.625 | {
"A": [
[
3.1666666666666665,
3.5416666666666665
]
],
"B": [
[
3.1666666666666665,
3.5416666666666665
]
]
} | 3.541667 | 1 | Late | HSR |
twinpast_0029 | videos/twinpast_0029/A.mp4 | videos/twinpast_0029/B.mp4 | In the opening packing scene, was the comb packed before or after the remote control, and were the wired earphones packed before or after the white bottle with a purple cap? | [
"The remote control before the comb; the bottle before the wired earphones.",
"The comb before the remote control; the wired earphones before the bottle.",
"The comb before the remote control; the bottle before the wired earphones.",
"The remote control before the comb; the wired earphones before the bottle."... | A | B | 33.166667 | {
"A": [
[
0,
2.066736
],
[
2.10007,
4.000133
],
[
4.20014,
5.966866
],
[
13.20044,
14.958333333333334
]
],
"B": [
[
0,
1.96765
],
[
2.001001,
4.568951
],
[
5.602801,
8.370852
... | 14.958333 | 1 | Middle | MEI |
twinpast_0030 | videos/twinpast_0030/A.mp4 | videos/twinpast_0030/B.mp4 | Was the blue box closed by the end of the opening packing scene? | [
"The box can be closed at the end.",
"The box cannot be closed at the end."
] | B | A | 22.916667 | {
"A": [
[
10.875,
13.916667
]
],
"B": [
[
11,
13.916667
]
]
} | 13.916667 | 1 | Late | HSR |
twinpast_0031 | videos/twinpast_0031/A.mp4 | videos/twinpast_0031/B.mp4 | At the end of the hand-held book scene above the brown table, what was the book’s state? | [
"Open to inner pages",
"Closed with the cover visible"
] | B | A | 33.041667 | {
"A": [
[
14.666666666666668,
15.041666666666668
]
],
"B": [
[
14.666666666666668,
15.041666666666668
]
]
} | 15.041667 | 2 | Late | HSR |
twinpast_0032 | videos/twinpast_0032/A.mp4 | videos/twinpast_0032/B.mp4 | Before first reaching the stove, from which side of the image did the woman first enter the kitchen view? | [
"The left side of the image.",
"The right side of the image."
] | B | A | 54.125 | {
"A": [
[
1,
3.2
]
],
"B": [
[
1,
3.2
]
]
} | 3.2 | 1 | Early | AIR |
twinpast_0033 | videos/twinpast_0033/A.mp4 | videos/twinpast_0033/B.mp4 | Before the close-up sewing demonstration, what is the woman holding up in front of the shelves of yarn? | [
"A colorful bird-like knitted craft.",
"A flat turquoise square swatch."
] | B | A | 72.958333 | null | null | null | null | AIR |
twinpast_0034 | videos/twinpast_0034/A.mp4 | videos/twinpast_0034/B.mp4 | In the earlier rocky beach scene at sunset, was a blue-green boat visible in the left foreground? | [
"Yes",
"No"
] | B | A | 43.25 | {
"A": [
[
0,
3.2500000000000004
]
],
"B": [
[
0,
3.2500000000000004
]
]
} | 3.25 | 1 | Middle | HSR |
twinpast_0035 | videos/twinpast_0035/A.mp4 | videos/twinpast_0035/B.mp4 | During the entire first object-motion scene, before the scene changes, how many complete new contact-and-separation episodes occur between the cyan cylinder and another object? Count a continuous contact once, and exclude ground contact and any contact already present when the first scene begins. | [
"1",
"0",
"2",
"3"
] | C | A | 10.208333 | {
"A": [
[
0,
5.083333333333333
]
],
"B": [
[
0,
5.083333333333333
]
]
} | 5.083333 | 1 | Middle | HAC |
twinpast_0036 | videos/twinpast_0036/A.mp4 | videos/twinpast_0036/B.mp4 | In the earlier tabletop close-up, what was the person stirring? | [
"Dark lumpy contents in a brown cup",
"A brown drink in a white cup"
] | B | A | 43.958333 | {
"A": [
[
0,
4.95
]
],
"B": [
[
0,
4.95
]
]
} | 4.958333 | 1 | Middle | AIR |
twinpast_0037 | videos/twinpast_0037/A.mp4 | videos/twinpast_0037/B.mp4 | At the end of the earlier wooden-floor segment, immediately before the scene changes, was the red screwdriver exposed or covered by the yellow towel? | [
"Covered by the yellow towel.",
"Exposed on the wooden floor."
] | B | A | 39.708333 | {
"A": [
[
0.7,
2.9
],
[
4.1,
4.7
]
],
"B": [
[
2,
3.9
],
[
4.1,
4.7
]
]
} | 4.708333 | 1 | Middle | HSR |
twinpast_0038 | videos/twinpast_0038/A.mp4 | videos/twinpast_0038/B.mp4 | In the earlier office scene with headset-wearing staff, what was in the left foreground beside the seated man? | [
"The dark back of a computer monitor",
"A green plant in a white pot"
] | A | B | 44.041667 | {
"A": [
[
0,
5
]
],
"B": [
[
0,
5
]
]
} | 5.041667 | 1 | Middle | AIR |
twinpast_0039 | videos/twinpast_0039/A.mp4 | videos/twinpast_0039/B.mp4 | How many complete claps did the seated person at the table make during the earlier demonstration, before the scene changed to the applauding audience? Count each continuous palm contact once, only after the hands separate. | [
"8",
"7",
"9",
"6"
] | D | C | 28.125 | {
"A": [
[
4.568951142237785,
5.002501250625313
],
[
6.036351509087877,
6.336501584125396
],
[
6.4365516091379025,
6.936801734200434
],
[
8.104052026013006,
8.437552109388028
],
[
8.504252126063031,
8.837752209438053
]... | 16.125 | 1 | Middle | HAC |
twinpast_0040 | videos/twinpast_0040/A.mp4 | videos/twinpast_0040/B.mp4 | In the earlier short fireplace scene, was a bright gold scale-patterned egg-shaped object visible among the flames? | [
"No",
"Yes"
] | A | B | 61.458333 | {
"A": [
[
0,
1.4583333333333333
]
],
"B": [
[
0,
1.4583333333333333
]
]
} | 1.458333 | 1 | Middle | AIR |
twinpast_0041 | videos/twinpast_0041/A.mp4 | videos/twinpast_0041/B.mp4 | In the earlier kitchen-counter scene, what was the prominently upright surface in front of the woman? | [
"An open spread of printed book pages",
"A laptop computer display"
] | B | A | 41.458333 | {
"A": [
[
0,
2.4583333333333335
]
],
"B": [
[
0,
2.4583333333333335
]
]
} | 2.458333 | 1 | Middle | AIR |
twinpast_0042 | videos/twinpast_0042/A.mp4 | videos/twinpast_0042/B.mp4 | In the earlier view of the silver oven beside the clear plastic drawers, how was the oven door positioned when that view ended? | [
"Lowered and open.",
"Upright and closed."
] | B | A | 15.708333 | {
"A": [
[
4.333333333333333,
4.708333333333333
]
],
"B": [
[
4.333333333333333,
4.708333333333333
]
]
} | 4.708333 | 1 | Late | HSR |
twinpast_0043 | videos/twinpast_0043/A.mp4 | videos/twinpast_0043/B.mp4 | In the opening tabletop scene, was the pink spoon covered by the white dish or revealed by lifting the dish? | [
"Covered by the dish.",
"Revealed by lifting the dish."
] | A | B | 78.791667 | {
"A": [
[
1.5,
3.4
]
],
"B": [
[
1.5,
3.4
]
]
} | 4.791667 | 1 | Middle | HSR |
twinpast_0044 | videos/twinpast_0044/A.mp4 | videos/twinpast_0044/B.mp4 | At the very start of the video, before the first time skip, what was visible inside the frying pan beside the window? | [
"A bare metal interior, with no egg visible.",
"The pan already contained egg."
] | B | A | 83.958333 | {
"A": [
[
0,
0.6
]
],
"B": [
[
0,
0.6
]
]
} | 0.6 | 1 | Early | HSR |
twinpast_0045 | videos/twinpast_0045/A.mp4 | videos/twinpast_0045/B.mp4 | Before the later shots of a red-capped swimmer, in what order are these outdoor-pool scenes shown: people poised at the edge of a high diving platform and a large splash viewed from the pool deck? | [
"People poised at the edge of a high diving platform, then a large splash viewed from the pool deck.",
"A large splash viewed from the pool deck, then people poised at the edge of a high diving platform."
] | B | A | 30.458333 | {
"A": [
[
0,
3.9583333333333335
],
[
4,
6.458333333333333
]
],
"B": [
[
0,
2.4583333333333335
],
[
2.5,
6.458333333333333
]
]
} | 6.458333 | 1 | Middle | EOR |
twinpast_0046 | videos/twinpast_0046/A.mp4 | videos/twinpast_0046/B.mp4 | At the end of the close-up with the clear rectangular tub, what was in the tub? | [
"The small bottle with a white cap.",
"Nothing."
] | A | B | 33.958333 | {
"A": [
[
13.583333333333334,
13.958333333333334
]
],
"B": [
[
13.583333333333334,
13.958333333333334
]
]
} | 13.958333 | 2 | Late | HSR |
twinpast_0047 | videos/twinpast_0047/A.mp4 | videos/twinpast_0047/B.mp4 | In the earlier clip, what geometric shapes did the person put on the table? | [
"square, square, hexagon, hexagon",
"circle, circle, triangle"
] | B | A | 34.25 | {
"A": [
[
17,
22.9
]
],
"B": [
[
17.4,
23.8
]
]
} | 23.8 | 1 | Late | AIR |
twinpast_0048 | videos/twinpast_0048/A.mp4 | videos/twinpast_0048/B.mp4 | Which sequence of the listed activities is shown before the final regular bowling turns? | [
"A plaid-shirted person performing a head-down bowling move beside an orange ball, then people cheering near the red chairs.",
"Only the plaid-shirted person performing the head-down bowling move beside the orange ball.",
"People cheering near the red chairs, then a plaid-shirted person performing a head-down b... | A | C | 39.958333 | {
"A": [
[
6.958333333333333,
10.708333333333332
],
[
10.75,
24.708333333333332
]
],
"B": [
[
6.958333333333333,
20.916666666666668
],
[
20.958333333333332,
24.708333333333332
]
]
} | 24.708333 | 1 | Middle | EOR |
twinpast_0049 | videos/twinpast_0049/A.mp4 | videos/twinpast_0049/B.mp4 | In the earlier clip, the person put a green cover on the red bottle and a yellow cover on the white tub with the green label. Which of those two containers was covered first? | [
"the red bottle",
"the white tub with the green label"
] | B | A | 38.041667 | {
"A": [
[
4.3,
8.9
]
],
"B": [
[
0.3,
5.6
]
]
} | 8.9 | 1 | Early | EOR |
twinpast_0050 | videos/twinpast_0050/A.mp4 | videos/twinpast_0050/B.mp4 | After first opening the cereal box, what does the man in the green hoodie hold up before he returns to the cereal box? | [
"A drinking mug.",
"A hand-operated citrus juicer."
] | A | B | 43.958333 | null | null | null | null | AIR |
twinpast_0051 | videos/twinpast_0051/A.mp4 | videos/twinpast_0051/B.mp4 | In the earlier tabletop close-up, what stood between the pink plant pot and the metal lamp base? | [
"A cream-faced analog clock",
"A black square device"
] | A | B | 37.958333 | {
"A": [
[
3,
7.95
]
],
"B": [
[
3,
7.95
]
]
} | 7.958333 | 2 | Late | AIR |
twinpast_0052 | videos/twinpast_0052/A.mp4 | videos/twinpast_0052/B.mp4 | Before the laptop-charging close-up, were the white charger and cable covered by the baseball cap when the toy-room tabletop shot ended? | [
"Uncovered",
"Covered"
] | A | B | 7.958333 | {
"A": [
[
1.5833333333333333,
1.9583333333333333
]
],
"B": [
[
1.5833333333333333,
1.9583333333333333
]
]
} | 1.958333 | 1 | Late | HSR |
twinpast_0053 | videos/twinpast_0053/A.mp4 | videos/twinpast_0053/B.mp4 | In the two separate close-up scenes before the man returns to writing at the wooden table, was the large white sheet folded or unfolded, and was the pen put into or taken out of the green cup? | [
"Unfolded; taken out of the cup.",
"Folded; put into the cup.",
"Folded; taken out of the cup.",
"Unfolded; put into the cup."
] | A | B | 25.041667 | {
"A": [
[
4,
6.291666666666666
],
[
6.333333333333334,
9.041666666666668
]
],
"B": [
[
4,
6.291666666666666
],
[
6.333333333333334,
9.041666666666668
]
]
} | 9.041667 | 2 | Late | MEI |
twinpast_0054 | videos/twinpast_0054/A.mp4 | videos/twinpast_0054/B.mp4 | During the opening scene on the gray floor, before the first cut to a different arrangement of objects, how many object-to-object collisions occur? Count a new contact when it visibly changes an object’s motion; count sustained contact only once. | [
"Three collisions",
"Two collisions"
] | A | B | 30.166667 | {
"A": [
[
0.96,
1.56
],
[
2.64,
3.32
],
[
3.76,
4.5
],
[
0,
4.541666666666667
]
],
"B": [
[
1.44,
2.24
],
[
3.44,
4.5
],
[
0,
4.541666666666667
]
]
} | 4.541667 | 1 | Middle | HAC |
twinpast_0055 | videos/twinpast_0055/A.mp4 | videos/twinpast_0055/B.mp4 | In the second tabletop object-release trials, how many separate times did the person release the small toy onto the tabletop and let it move freely? | [
"Two times",
"Three times"
] | B | A | 68.833333 | {
"A": [
[
16.208333333333336,
17.708333333333336
],
[
19.408333333333335,
21.208333333333336
],
[
24.90833333333333,
26.708333333333336
],
[
28.325,
29.125
]
],
"B": [
[
16.708333333333336,
18.208333333333336
],
... | 29.125 | 2 | Late | HAC |
twinpast_0056 | videos/twinpast_0056/A.mp4 | videos/twinpast_0056/B.mp4 | In the earlier clip, what changed on the table while the camera was looking away? | [
"The spray bottle was removed and a remote was added in its place.",
"The bottle and watch were removed and a clothespin and mobile were added."
] | A | B | 50.416667 | {
"A": [
[
0,
17.291667
]
],
"B": [
[
0,
17.291667
]
]
} | 17.291667 | 1 | Middle | MEI |
twinpast_0057 | videos/twinpast_0057/A.mp4 | videos/twinpast_0057/B.mp4 | In the brief object-demonstration shot inserted between the two parts of sandwich making, what did the red-shirted person hold up toward the camera before setting it on the table? | [
"A plastic water bottle.",
"A charging cable and plug.",
"A transparent glass plate.",
"A cup or mug."
] | C | D | 40.5 | {
"A": [
[
6,
7.25
]
],
"B": [
[
7.25,
8.5
]
]
} | 8.5 | 2 | Late | AIR |
twinpast_0058 | videos/twinpast_0058/A.mp4 | videos/twinpast_0058/B.mp4 | Before the later scene of a baby smiling and moving on a bed, in what order are these two portrait scenes shown: a blonde woman changing facial expressions and a bearded man changing his expression from neutral to smiling? | [
"A blonde woman changing facial expressions, then a bearded man changing his expression from neutral to smiling.",
"A bearded man changing his expression from neutral to smiling, then a blonde woman changing facial expressions."
] | A | B | 58.791667 | {
"A": [
[
0,
13.083333333333334
],
[
13.125,
26.791666666666668
]
],
"B": [
[
0,
13.666666666666666
],
[
13.708333333333334,
26.791666666666668
]
]
} | 26.791667 | 1 | Middle | EOR |
twinpast_0059 | videos/twinpast_0059/A.mp4 | videos/twinpast_0059/B.mp4 | During the first shot, how did the small green printed tea box on the left side of the table change from the start to the end of that shot? | [
"It stayed open.",
"It stayed closed.",
"It changed from open to closed.",
"It changed from closed to open."
] | C | D | 32.458333 | {
"A": [
[
0,
1.1
],
[
1.1,
1.95
],
[
1.95,
2.45
]
],
"B": [
[
0,
0.8
],
[
0.8,
1.65
],
[
1.65,
2.45
]
]
} | 2.45 | 1 | Middle | HSR |
twinpast_0060 | videos/twinpast_0060/A.mp4 | videos/twinpast_0060/B.mp4 | In the earlier clip, which of these two containers had its lid put on first: the white plastic tub or the tall pink container? | [
"tall pink container",
"white plastic tub"
] | A | B | 28.333333 | {
"A": [
[
6.5,
17.75
]
],
"B": [
[
2,
15.75
]
]
} | 17.75 | 1 | Middle | EOR |
twinpast_0061 | videos/twinpast_0061/A.mp4 | videos/twinpast_0061/B.mp4 | During the earlier target segment only, what was the shown order of these two actions?
Action 1. rowing on a machine
Action 2. showing the screen on the rowing machine | [
"First action 2, then action 1",
"First action 1, then action 2"
] | A | B | 58.666667 | {
"A": [
[
2,
12
],
[
13,
20
]
],
"B": [
[
0.3,
6.5
],
[
18,
26
]
]
} | 27.666667 | 1 | Middle | EOR |
twinpast_0062 | videos/twinpast_0062/A.mp4 | videos/twinpast_0062/B.mp4 | At the end of the earlier demonstration by the woman holding the small round clear container with a hinged lid, was that lid lowered shut or raised open? | [
"Lowered shut over the container",
"Raised open above the container"
] | A | B | 135.375 | {
"A": [
[
3.666666666666667,
4.375
]
],
"B": [
[
3.666666666666667,
4.375
]
]
} | 4.375 | 1 | Late | HSR |
twinpast_0063 | videos/twinpast_0063/A.mp4 | videos/twinpast_0063/B.mp4 | Which way did the blue bottle with the white nozzle move across the lace-patterned fabric, and which way did the shiny metal tumbler move across the dark wooden boards? | [
"Left; right.",
"Right; left.",
"Left; left.",
"Right; right."
] | C | D | 17.291667 | {
"A": [
[
0,
0.3333333333333333
],
[
2.25,
2.5833333333333335
],
[
2.6666666666666665,
3
],
[
4.916666666666666,
5.25
]
],
"B": [
[
0,
0.3333333333333333
],
[
2.25,
2.5833333333333335
],
[
... | 5.25 | 1 | Middle | MEI |
twinpast_0064 | videos/twinpast_0064/A.mp4 | videos/twinpast_0064/B.mp4 | Before the later footage of a young child in green moving a skateboard, in what order are the adult skateboarder’s trick montage and his fall in the wide view beside a large building shown? | [
"The trick montage, then the fall beside the large building.",
"The fall beside the large building, then the trick montage."
] | B | A | 25.25 | {
"A": [
[
0,
2.2
],
[
2.3,
9.25
]
],
"B": [
[
0,
7
],
[
7.05,
9.25
]
]
} | 9.25 | 1 | Middle | EOR |
twinpast_0065 | videos/twinpast_0065/A.mp4 | videos/twinpast_0065/B.mp4 | Before the tattooed barber with the bearded adult client appears, in what order are the boy opening the glass door and the boy having his hair cut shown? | [
"The boy opens the glass door, then has his hair cut.",
"The boy has his hair cut, then opens the glass door."
] | A | B | 33.291667 | {
"A": [
[
2.3,
7.8
],
[
8.2,
27.291666666666668
]
],
"B": [
[
0,
19.2
],
[
21.5,
27.291666666666668
]
]
} | 27.291667 | 1 | Middle | EOR |
twinpast_0066 | videos/twinpast_0066/A.mp4 | videos/twinpast_0066/B.mp4 | In the second object-on-ramp sequence, how many completed releases of the small cylinder to roll down the board were visible before the cut to the next sequence? | [
"Three times.",
"Four times."
] | A | B | 199.291667 | {
"A": [
[
32.975,
34.475
],
[
36.875,
38.675
],
[
41.375,
42.875
],
[
44.375,
45.375
]
],
"B": [
[
31.675,
32.775
],
[
35.775,
36.975
],
[
39.175,
40.675
],
[
43.2... | 45.375 | 2 | Late | HAC |
twinpast_0067 | videos/twinpast_0067/A.mp4 | videos/twinpast_0067/B.mp4 | In the scene with the man in a green top taking notes at a wooden desk, what computer device was beside his open notebook on the right side of the image? | [
"An open laptop.",
"An upright desktop screen on a stand."
] | A | B | 23.416667 | {
"A": [
[
9,
13.958333333333332
]
],
"B": [
[
9,
13.958333333333332
]
]
} | 13.958333 | null | Late | AIR |
twinpast_0068 | videos/twinpast_0068/A.mp4 | videos/twinpast_0068/B.mp4 | In the cleaning demonstration before the person wipes the glass panel, which sequence of activities is shown? | [
"Moving the vacuum head across a wet floor repeatedly, without using the hose nozzle inside a sink.",
"Using the hose nozzle inside a sink repeatedly, without moving the vacuum head across a wet floor.",
"Using the hose nozzle inside a sink, then moving the vacuum head across a wet floor.",
"Moving the vacuum... | D | C | 29.458333 | {
"A": [
[
0,
7.291666666666667
],
[
7.375,
9.458333333333334
]
],
"B": [
[
0,
2.0833333333333335
],
[
2.125,
9.458333333333334
]
]
} | 9.458333 | 1 | Middle | EOR |
twinpast_0069 | videos/twinpast_0069/A.mp4 | videos/twinpast_0069/B.mp4 | Could the black box be closed successfully at the end of the opening packing scene? | [
"The box can be closed at the end.",
"The box cannot be closed at the end."
] | B | A | 54.791667 | {
"A": [
[
17.825,
21.75
]
],
"B": [
[
16.4,
21.75
]
]
} | 21.75 | 1 | Late | HSR |
twinpast_0070 | videos/twinpast_0070/A.mp4 | videos/twinpast_0070/B.mp4 | Before the cosmetics-drawer organizing scene, was the green mirrored compact open or closed when that close-up ended? | [
"Open",
"Closed"
] | B | A | 20.875 | {
"A": [
[
4.5,
4.875
]
],
"B": [
[
4.5,
4.875
]
]
} | 4.875 | 1 | Late | HSR |
twinpast_0071 | videos/twinpast_0071/A.mp4 | videos/twinpast_0071/B.mp4 | In the earlier short poolside scene, was a gray sculptural ornament visible at the edge of the pool? | [
"Yes",
"No"
] | A | B | 63.458333 | {
"A": [
[
0,
1.4583333333333333
]
],
"B": [
[
0,
1.4583333333333333
]
]
} | 1.458333 | 1 | Middle | AIR |
twinpast_0072 | videos/twinpast_0072/A.mp4 | videos/twinpast_0072/B.mp4 | Between the opening glass-partition cleaning and the woman on the ladder, what does the person first pick up or move, and which surface do they later wipe with a white cloth? | [
"Moves a soft black item onto the armchair; wipes the tabletop.",
"Takes a pink-covered book from the cabinet; wipes the mirror.",
"Moves a soft black item onto the armchair; wipes the mirror.",
"Takes a pink-covered book from the cabinet; wipes the tabletop."
] | B | A | 126.583333 | null | null | null | null | MEI |
twinpast_0073 | videos/twinpast_0073/A.mp4 | videos/twinpast_0073/B.mp4 | In the second animation shown, what color was the cylinder that was stationary at the end? | [
"Cyan or teal",
"Red",
"Yellow",
"Blue"
] | D | A | 25.583333 | {
"A": [
[
9.445,
10.205
]
],
"B": [
[
9.445,
10.205
]
]
} | 10.205 | 2 | Late | AIR |
twinpast_0074 | videos/twinpast_0074/A.mp4 | videos/twinpast_0074/B.mp4 | In the opening demonstration shown, before the view changes to the person in a blue hoodie at the floral-covered table, how many separate times does the person push and release an object so that it rolls or slides across the table without hand contact? Count each new release once; exclude hand-held returns and natural ... | [
"Three releases.",
"Four releases.",
"Two releases.",
"One release."
] | A | C | 22.458333 | {
"A": [
[
0,
2.9050000000000002
],
[
4.091193460122285,
7.904
],
[
9.19202783501672,
10.404
],
[
12.25,
12.458333333333334
]
],
"B": [
[
0.8146252069047057,
5.405
],
[
6.422164983278722,
7.769
... | 12.458333 | 1 | Middle | HAC |
twinpast_0075 | videos/twinpast_0075/A.mp4 | videos/twinpast_0075/B.mp4 | In the second animation shown, what color was the sphere that was already moving at the start? | [
"Green",
"Purple",
"Brown",
"Blue"
] | A | C | 25.583333 | {
"A": [
[
5.125,
5.605
]
],
"B": [
[
5.125,
5.605
]
]
} | 5.605 | 2 | Middle | AIR |
twinpast_0076 | videos/twinpast_0076/A.mp4 | videos/twinpast_0076/B.mp4 | At the end of the second container-handling trial, was the tall blue glass bottle fitted with a white cap? | [
"Yes, it was fitted with a white cap",
"No, its mouth remained open"
] | A | B | 76.625 | {
"A": [
[
31.5,
31.75
]
],
"B": [
[
31.5,
31.75
]
]
} | 31.75 | 2 | Late | HSR |
twinpast_0077 | videos/twinpast_0077/A.mp4 | videos/twinpast_0077/B.mp4 | During the opening scene on the gray floor, before the first cut to a different arrangement of objects, how many object-to-object collisions occur? Count a new contact when it visibly changes an object’s motion; count sustained contact only once. | [
"One collision",
"Two collisions"
] | A | B | 28.791667 | {
"A": [
[
1.28,
2.56
],
[
0,
3.1666666666666665
]
],
"B": [
[
0.88,
1.6
],
[
1.52,
2.56
],
[
0,
3.1666666666666665
]
]
} | 3.166667 | 1 | Middle | HAC |
twinpast_0078 | videos/twinpast_0078/A.mp4 | videos/twinpast_0078/B.mp4 | In the earlier close-up of the man wearing a tie, what object did he hold? | [
"A saxophone",
"An ornate holder with a lit candle"
] | B | A | 35.375 | {
"A": [
[
0,
1.375
]
],
"B": [
[
0,
1.375
]
]
} | 1.375 | 1 | Middle | AIR |
twinpast_0079 | videos/twinpast_0079/A.mp4 | videos/twinpast_0079/B.mp4 | In the snowy forest scene with the bearded man beside the stream, which type of hat was he wearing? | [
"A hat with antlers",
"A knitted beanie"
] | B | A | 84.958333 | {
"A": [
[
5,
9.958333333333334
]
],
"B": [
[
5,
9.958333333333334
]
]
} | 9.958333 | 1 | Late | AIR |
twinpast_0080 | videos/twinpast_0080/A.mp4 | videos/twinpast_0080/B.mp4 | In the orange-juice preparation after the cereal-box scene, what does the woman do first, and what does she do just before the pancake-cooking scene begins? | [
"Pressing an orange half on the hand juicer; pressing an orange half on the hand juicer.",
"Cutting an orange on the board; pouring juice from the juicer into a glass.",
"Pressing an orange half on the hand juicer; pouring juice from the juicer into a glass.",
"Cutting an orange on the board; pressing an oran... | D | C | 83.958333 | null | null | null | null | MEI |
twinpast_0081 | videos/twinpast_0081/A.mp4 | videos/twinpast_0081/B.mp4 | Before the sink-scrubbing close-up, how was water coming from the chrome tap when the first sink shot ended? | [
"Only a thin trickle or drips",
"A strong continuous stream"
] | A | B | 15.375 | {
"A": [
[
5,
5.375
]
],
"B": [
[
5,
5.375
]
]
} | 5.375 | 1 | Late | HSR |
twinpast_0082 | videos/twinpast_0082/A.mp4 | videos/twinpast_0082/B.mp4 | At the end of the dark-table scene with the slim tool on white tissue, was the slim tool covered or uncovered, and at the end of the light-table scene with the black cable, was the black cable covered or uncovered? | [
"Uncovered; covered.",
"Uncovered; uncovered.",
"Covered; uncovered.",
"Covered; covered."
] | A | C | 15.125 | {
"A": [
[
7.166666666666667,
7.5
],
[
9.25,
9.583333333333332
]
],
"B": [
[
7.166666666666667,
7.5
],
[
9.25,
9.583333333333332
]
]
} | 9.583333 | 2 | Late | MEI |
twinpast_0083 | videos/twinpast_0083/A.mp4 | videos/twinpast_0083/B.mp4 | At the end of the close-up of hands holding white paper against a dark background, before the gift-wrapping scene resumes, what shape is the paper? | [
"Wide and horizontal, with the printed face visible.",
"Narrowly folded and vertical, with the pale lined face visible."
] | B | A | 59.291667 | null | null | null | null | HSR |
twinpast_0084 | videos/twinpast_0084/A.mp4 | videos/twinpast_0084/B.mp4 | At the end of the black-shirt demonstration on the patterned bedspread, was the shirt folded into a small rectangle or spread flat? | [
"Folded into a small rectangle",
"Spread flat"
] | B | A | 15.125 | {
"A": [
[
8.75,
9.125
]
],
"B": [
[
8.75,
9.125
]
]
} | 9.125 | 2 | Late | HSR |
twinpast_0085 | videos/twinpast_0085/A.mp4 | videos/twinpast_0085/B.mp4 | At the end of the earlier bedding segment, immediately before the scene changes, was the white pillow exposed or covered by the gray sheet? | [
"Covered by the gray sheet.",
"Exposed beside the gray sheet."
] | B | A | 39.041667 | {
"A": [
[
1.4,
3.2
],
[
3.433333333333333,
4.033333333333333
]
],
"B": [
[
0.7,
2.7
],
[
3.433333333333333,
4.033333333333333
]
]
} | 4.041667 | 1 | Middle | HSR |
twinpast_0086 | videos/twinpast_0086/A.mp4 | videos/twinpast_0086/B.mp4 | In the opening close-up displays beside the tall red vase, which objects does the person hold up first and second, respectively? | [
"Pen, then spoon",
"Fork, then fork",
"Fork, then spoon",
"Pen, then fork"
] | C | D | 43.208333 | null | null | null | null | MEI |
twinpast_0087 | videos/twinpast_0087/A.mp4 | videos/twinpast_0087/B.mp4 | In the earlier clip, what geometric shapes did the person draw on the paper? | [
"square, triangle",
"circle, rectangle"
] | A | B | 32.708333 | {
"A": [
[
1,
23.208333
]
],
"B": [
[
1,
17.6
]
]
} | 23.208333 | 1 | Middle | AIR |
twinpast_0088 | videos/twinpast_0088/A.mp4 | videos/twinpast_0088/B.mp4 | When the first box-packing scene begins, are there already any objects visible inside the open box? | [
"No, the visible interior is empty.",
"Yes, objects are already visible inside."
] | B | A | 15.958333 | {
"A": [
[
0,
0.5
]
],
"B": [
[
0,
0.5
]
]
} | 0.5 | 1 | Early | HSR |
twinpast_0089 | videos/twinpast_0089/A.mp4 | videos/twinpast_0089/B.mp4 | In the earlier clip, which two geometric shapes did the person draw on the paper? | [
"square, circle",
"circle, triangle"
] | B | A | 25.75 | {
"A": [
[
13.013,
14.481
]
],
"B": [
[
8.831,
10.96
]
]
} | 14.481 | 1 | Late | AIR |
twinpast_0090 | videos/twinpast_0090/A.mp4 | videos/twinpast_0090/B.mp4 | In the shoebox-packing scene, which was placed into the box first: the metal guitarist figurine or the small red object? | [
"The small red object was placed first.",
"The metal guitarist figurine was placed first.",
"They were placed at the same time.",
"Neither object was placed into the box."
] | A | B | 31.958333 | {
"A": [
[
7.79308,
8.431307
],
[
12.630165,
14.074572
]
],
"B": [
[
8.39687,
9.370907
],
[
13.502166,
14.073154
]
]
} | 14.074572 | 1 | Middle | EOR |
twinpast_0091 | videos/twinpast_0091/A.mp4 | videos/twinpast_0091/B.mp4 | At the start of the man's cooking scene, which vessel does he stir in first, and which vessel does he next lift and tilt? | [
"Stirs in the green bowl; then lifts and tilts the green bowl.",
"Stirs in the frying pan; then lifts and tilts the frying pan.",
"Stirs in the frying pan; then lifts and tilts the green bowl.",
"Stirs in the green bowl; then lifts and tilts the frying pan."
] | C | D | 59.958333 | null | null | null | null | MEI |
twinpast_0092 | videos/twinpast_0092/A.mp4 | videos/twinpast_0092/B.mp4 | At the end of the green-bedcover scene with the baseball cap, was the small round clear object covered or uncovered, and at the end of the wooden-floor scene with the dark cloth, was the small black wheeled toy covered or uncovered? | [
"Uncovered; uncovered.",
"Covered; covered.",
"Covered; uncovered.",
"Uncovered; covered."
] | C | D | 16.791667 | {
"A": [
[
5.166666666666666,
5.5
],
[
9.75,
10.083333333333334
]
],
"B": [
[
5.166666666666666,
5.5
],
[
9.75,
10.083333333333334
]
]
} | 10.083333 | 2 | Late | MEI |
twinpast_0093 | videos/twinpast_0093/A.mp4 | videos/twinpast_0093/B.mp4 | In the earlier clip, the person covered the tall green bottle on the left and the small clear square plastic tub at the front of the table. Which of those two containers was covered first? | [
"The tall green bottle",
"The small clear square plastic tub at the front of the table"
] | B | A | 34.291667 | {
"A": [
[
1.9,
11.6
]
],
"B": [
[
2,
13.5
]
]
} | 13.5 | 1 | Middle | EOR |
twinpast_0094 | videos/twinpast_0094/A.mp4 | videos/twinpast_0094/B.mp4 | In the opening scene showing a boy holding a bottle in front of a refrigerator, is liquid visibly streaming from the bottle? | [
"Yes",
"No"
] | A | B | 54.125 | {
"A": [
[
4.3,
15.125
]
],
"B": [
[
4.3,
15.125
]
]
} | 15.125 | 1 | Middle | HSR |
twinpast_0095 | videos/twinpast_0095/A.mp4 | videos/twinpast_0095/B.mp4 | At the end of the stool-handling test in the first clip, did the door reach a fully shut position on the last closing attempt shown in that test? | [
"No, it remained partly open",
"Yes, it became fully shut"
] | B | A | 42.458333 | {
"A": [
[
0.9202650000000006,
2.102577
],
[
6.3589030000000015,
8.958333333333334
]
],
"B": [
[
1.8899270000000001,
3.0722389999999997
],
[
3.3087020000000003,
8.747340000000001
]
]
} | 8.958333 | 1 | Middle | HSR |
twinpast_0096 | videos/twinpast_0096/A.mp4 | videos/twinpast_0096/B.mp4 | Before the overhead view of the doorway beside the purple wall, was the door fully shut at the end of the earlier demonstration? | [
"No, it remained partly open.",
"Yes, it was fully shut."
] | B | A | 21.958333 | {
"A": [
[
11,
11.958333333333334
]
],
"B": [
[
11,
11.958333333333334
]
]
} | 11.958333 | 1 | Late | HSR |
twinpast_0097 | videos/twinpast_0097/A.mp4 | videos/twinpast_0097/B.mp4 | In the earlier clip, what geometric shapes did the person draw on the paper? | [
"circle, rectangle",
"triangle, square"
] | A | B | 52.833333 | {
"A": [
[
12.4,
14
]
],
"B": [
[
6.4,
8.4
]
]
} | 14 | 1 | Middle | AIR |
twinpast_0098 | videos/twinpast_0098/A.mp4 | videos/twinpast_0098/B.mp4 | In the earlier clip, what geometric shapes did the person draw on the paper? | [
"triangle, square",
"flag, cube, heart"
] | B | A | 38.25 | {
"A": [
[
12.5,
20.7
]
],
"B": [
[
9.4,
11.2
]
]
} | 20.7 | 1 | Middle | AIR |
twinpast_0099 | videos/twinpast_0099/A.mp4 | videos/twinpast_0099/B.mp4 | In the earlier clip, what was the order of the letters at the beginning? | [
"cha",
"ahc"
] | B | A | 52 | {
"A": [
[
0,
22.4
]
],
"B": [
[
0,
4.4
]
]
} | 22.4 | 1 | Early | HSR |
twinpast_0100 | videos/twinpast_0100/A.mp4 | videos/twinpast_0100/B.mp4 | In the displayed toy-vehicle rolling demonstration before the cardboard-box adjustment scene, how many times is the vehicle released to roll freely? Count only visible releases after the hand lets go, not repositioning while the hand remains in contact. | [
"Four releases.",
"One release.",
"Two releases.",
"Three releases."
] | C | D | 16.458333 | {
"A": [
[
1.5,
2.875
],
[
8.375,
9.45
],
[
9.25,
9.45
]
],
"B": [
[
0.75,
2.5
],
[
3.5,
5.625
],
[
6.75,
9
],
[
9.25,
9.45
]
]
} | 9.45 | 1 | Middle | HAC |
End of preview. Expand in Data Studio
TwinPast
350 video pairs with a shared question and option list, separate answers for A and B, query times, evidence intervals, decisive-event positions, and task labels.
Each row of data.jsonl describes one video pair. Video paths are relative to this directory. Answer letters refer to the ordered options and are independent of the video branch.
| Field | Meaning |
|---|---|
pair_id |
Public pair identifier |
video_a, video_b |
Paths to the two original video files |
question, options |
Shared question and ordered answer options |
answer_a, answer_b |
Correct option letter for each video |
t_query |
Query time in seconds |
evidence_intervals |
Annotated evidence intervals in seconds for A and B |
last_decisive_evidence_time |
Annotated time of the last decisive evidence, in seconds |
target_event_rank |
Annotated event ordinal, where available |
position_bin |
Recorded positional label: Early, Middle, or Late |
task |
Task label from the table below |
A null value denotes an unavailable annotation. Times are recorded annotations; no missing values are inferred.
| Task | Name |
|---|---|
| AIR | Attribute and Identity Recall |
| HSR | Historical State Recall |
| EOR | Event Order Reasoning |
| HAC | Historical Action Counting |
| MEI | Multi-Event Integration |
License
This dataset uses component-specific licensing; see LICENSE. Original TwinPast questions and annotations are offered under CC BY 4.0 only to the extent that the contributors hold the relevant rights. Third-party videos and other source materials retain their own terms, including any applicable attribution, noncommercial, share-alike, and redistribution requirements. Neither this notice nor the dataset's availability grants permissions that the contributors do not hold. Source permissions and asset-specific attribution remain necessary; the source list in LICENSE is not a complete redistribution clearance.
Citation
@misc{yang2026twinpastbenchmarkinghistoricalevidence,
title={TwinPast: Benchmarking Historical Evidence Use in Streaming Video Understanding with Evidence Contrastive Video Pairs},
author={Haotian Yang and Yong Chen and Cheng Peng and Haobo Wang and Zhongle Xie and Xuanru Li and Gang Chen},
year={2026},
eprint={2610.41983},
archivePrefix={arXiv},
primaryClass={cs.CV},
url={https://arxiv.org/abs/2610.41983},
}
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