Add MotionBlind dataset: 41 instances, 82 clips, card + manifests

.gitattributes

@@ -58,3 +58,39 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 # Video files - compressed
 *.mp4 filter=lfs diff=lfs merge=lfs -text
 *.webm filter=lfs diff=lfs merge=lfs -text
+videos/09_08_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/09_08_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/09_09_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/09_09_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/09_10_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/09_10_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/09_11_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/09_11_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/09_12_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/09_12_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_00_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_00_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_02_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_02_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_03_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_03_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_04_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_04_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_05_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_05_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_06_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_06_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_07_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_07_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_08_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_08_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_12_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_12_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_13_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/14_13_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/15_00_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/15_00_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/15_01_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/15_01_1.mov filter=lfs diff=lfs merge=lfs -text
+videos/15_02_0.mov filter=lfs diff=lfs merge=lfs -text
+videos/15_02_1.mov filter=lfs diff=lfs merge=lfs -text

README.md

@@ -0,0 +1,130 @@
+---
+license: cc-by-4.0
+pretty_name: MotionBlind
+language:
+  - en
+task_categories:
+  - visual-question-answering
+  - video-text-to-text
+tags:
+  - video
+  - video-llm
+  - motion-understanding
+  - physical-reasoning
+  - contrastive
+  - minimal-pairs
+  - benchmark
+size_categories:
+  - n<1K
+configs:
+  - config_name: default
+    data_files:
+      - split: test
+        path: data/motionblind.jsonl
+---
+
+# MotionBlind
+
+**A contrastive benchmark for physical-motion perception in Video-LLMs.**
+
+A Video-LLM can watch two clips of the same person in the same room and name every
+object in both, yet fail to tell you which one moves *faster*, which way a hand travels,
+or how *far* a box slides. **MotionBlind** is a contrastive, minimal-pairs benchmark
+built to expose exactly that gap: pairs of near-identical clips that differ **only** in
+motion, each paired with two complementary yes/no questions.
+
+<p align="center">
+  <img src="assets/overview.png" width="90%">
+</p>
+
+## Why it is hard
+
+Each instance is a **2×2**: two near-identical videos (\(i_0, i_1\)) crossed with two
+complementary questions (\(q_0, q_1\)), with a **diagonal** gold pattern
+(\(q_0\) is *yes* for \(i_0\) and *no* for \(i_1\); vice-versa for \(q_1\)). Because the
+paired clips share static content and differ only in motion, a model that ignores the
+temporal signal cannot satisfy the pattern no matter how good its object recognition is.
+Single-frame, appearance, and language-only shortcuts all collapse toward the **6.25 %**
+chance floor.
+
+## What is inside
+
+| | |
+|---|---|
+| Instances (2×2) | **41** |
+| Clips | **82** |
+| Items (video × question) | **164** |
+| Answer balance | 50 / 50 yes / no |
+| Modality | short self-recorded video + text |
+| Language | English |
+
+All categories are **physical / kinematic** — precisely the variables that are hard to
+source and label from uncontrolled internet video, but directly controllable in a lab:
+
+| Characteristic | Subtype | Instances | Example question |
+|---|---|---|---|
+| Speed | successive | 6 | *Does the person stir faster the first time than the second?* |
+| Magnitude | successive | 15 | *Does the toy car travel farther in the second push than the first?* |
+| Direction | translational | 14 | *From the camera's point of view, is the man walking to the right?* |
+| Direction | rotational | 6 | *Is the bottle spun clockwise?* |
+
+## Metric
+
+We use the TimeBlind / Winoground-style nested scores (primary = **Instance Accuracy**):
+
+- **Acc** — fraction of individual items correct (chance 50 %).
+- **Q_Acc** — a question scores only if correct on *both* videos (chance 25 %).
+- **V_Acc** — a video scores only if *both* its questions are correct (chance 25 %).
+- **I_Acc** — an instance scores only if **all four** items are correct (chance **6.25 %**).
+
+### Human ceiling vs. models
+
+| | Acc | I_Acc |
+|---|---|---|
+| **Human** (mean of 5 annotators) | **97.8** | **91.3** |
+| Best open Video-LLM (≤ 8B) | ~60 | **≤ 25** |
+| Chance | 50.0 | 6.25 |
+
+Per-item accuracy looks competent, but instance-level discrimination sits near the floor
+— the illusion the benchmark is named for.
+
+## Dataset structure
+
+`data/motionblind.jsonl` — one row per item (164 rows):
+
+```json
+{"instance_id": "02_00", "category": "Speed", "subtype": "successive",
+ "video": "02_00_0.mp4", "variant": 0, "question_idx": 1,
+ "question": "Does the person stir faster the first time compared to the second time?",
+ "answer": "yes"}
+```
+
+`data/instances.jsonl` — one row per 2×2 instance (41 rows), with `video_0/1`,
+`question_1/2`, and the diagonal `gold`. Videos live in `videos/`.
+
+**Gold convention.** Files are named `<catID>_<pair>_<variant>.<ext>`; the first video
+(`_0`) and the first question are the *yes* case, i.e. within each instance the four items
+follow the diagonal `[yes, no, no, yes]`.
+
+## Usage
+
+```python
+from datasets import load_dataset
+from huggingface_hub import snapshot_download
+
+ds = load_dataset("augmentedcognitionlab/MotionBlind", split="test")
+# videos:
+path = snapshot_download("augmentedcognitionlab/MotionBlind", repo_type="dataset")
+# ds[0]["video"] -> file under {path}/videos/
+```
+
+## License & intended use
+
+Released under CC-BY-4.0 for research on motion perception in video models. Human faces
+in all clips are automatically blurred. Please use responsibly.
+
+## Citation
+
+A paper describing MotionBlind is forthcoming; a citation will be added here soon.
+
+Maintained by the Augmented Cognition Lab (ACLab), Northeastern University.

data/instances.jsonl

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+{"instance_id": "02_00", "category": "Speed", "subtype": "successive", "video_0": "02_00_0.mp4", "video_1": "02_00_1.mp4", "question_1": "Does the person stir faster the first time compared to the second time?", "question_2": "Does the person stir slower the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "02_01", "category": "Speed", "subtype": "successive", "video_0": "02_01_0.mp4", "video_1": "02_01_1.mp4", "question_1": "Does the drawer close faster the first time compared to the second time?", "question_2": "Does the drawer close slower the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "02_02", "category": "Speed", "subtype": "successive", "video_0": "02_02_0.mp4", "video_1": "02_02_1.mp4", "question_1": "Does the person open their hand faster the first time compared to the second time?", "question_2": "Does the person open their hand slower the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "02_03", "category": "Speed", "subtype": "successive", "video_0": "02_03_0.mp4", "video_1": "02_03_1.mp4", "question_1": "Does the person press the pillow faster the first time compared to the second time?", "question_2": "Does the person press the pillow slower the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "02_04", "category": "Speed", "subtype": "successive", "video_0": "02_04_0.mp4", "video_1": "02_04_1.mp4", "question_1": "Once off the ramp, does the ball move faster the first time compared to the second time?", "question_2": "Once off the ramp, does the ball move slower the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "02_05", "category": "Speed", "subtype": "successive", "video_0": "02_05_0.mp4", "video_1": "02_05_1.mp4", "question_1": "Does the ball travel faster in the second push compared to the first?", "question_2": "Does the ball travel faster in the first push compared to the second?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_00", "category": "Magnitude", "subtype": "successive", "video_0": "09_00_0.mp4", "video_1": "09_00_1.mp4", "question_1": "Does the box travel farther in the second push compared to the first?", "question_2": "Does the box travel farther in the first push compared to the second?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_01", "category": "Magnitude", "subtype": "successive", "video_0": "09_01_0.mp4", "video_1": "09_01_1.mp4", "question_1": "Does the puck travel farther in the second push compared to the first?", "question_2": "Does the puck travel farther in the first push compared to the second?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_02", "category": "Magnitude", "subtype": "successive", "video_0": "09_02_0.mp4", "video_1": "09_02_1.mp4", "question_1": "Does the toy car travel farther in the second push compared to the first?", "question_2": "Does the toy car travel farther in the first push compared to the second?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_03", "category": "Magnitude", "subtype": "successive", "video_0": "09_03_0.mp4", "video_1": "09_03_1.mp4", "question_1": "Does the ball travel farther in the second push compared to the first?", "question_2": "Does the ball travel farther in the first push compared to the second?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_04", "category": "Magnitude", "subtype": "successive", "video_0": "09_04_0.mp4", "video_1": "09_04_1.mp4", "question_1": "Does the ball travel farther in the second push compared to the first?", "question_2": "Does the ball travel farther in the first push compared to the second?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_05", "category": "Magnitude", "subtype": "successive", "video_0": "09_05_0.mp4", "video_1": "09_05_1.mp4", "question_1": "Does the ball that starts closer to the camera roll further?", "question_2": "Does the ball that starts farther from the camera roll further?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_06", "category": "Magnitude", "subtype": "successive", "video_0": "09_06_0.mp4", "video_1": "09_06_1.mp4", "question_1": "From the camera's point of view, does the right disk move further?", "question_2": "From the camera's point of view, does the left disk move further?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_07", "category": "Magnitude", "subtype": "successive", "video_0": "09_07_0.mp4", "video_1": "09_07_1.mp4", "question_1": "Is the magnitude of the pendulum arc smaller the first time compared to the second time?", "question_2": "Is the magnitude of the pendulum arc larger the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_08", "category": "Magnitude", "subtype": "successive", "video_0": "09_08_0.mov", "video_1": "09_08_1.mov", "question_1": "Is the drawer pulled out farther the first time compared to the second time?", "question_2": "Is the drawer pulled out less the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_09", "category": "Magnitude", "subtype": "successive", "video_0": "09_09_0.mov", "video_1": "09_09_1.mov", "question_1": "Is the magnitude of the person's arm swing smaller the first time compared to the second time?", "question_2": "Is the magnitude of the person's arm swing larger the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_10", "category": "Magnitude", "subtype": "successive", "video_0": "09_10_0.mov", "video_1": "09_10_1.mov", "question_1": "Is the magnitude of the ball's first bounce smaller the first time compared to the second time?", "question_2": "Is the magnitude of the ball's first bounce larger the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_11", "category": "Magnitude", "subtype": "successive", "video_0": "09_11_0.mov", "video_1": "09_11_1.mov", "question_1": "Does the ball travel farther the second time compared to the first time?", "question_2": "Does the ball travel farther the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_12", "category": "Magnitude", "subtype": "successive", "video_0": "09_12_0.mov", "video_1": "09_12_1.mov", "question_1": "Does the ball travel farther the second time compared to the first time?", "question_2": "Does the ball travel farther the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_13", "category": "Magnitude", "subtype": "successive", "video_0": "09_13_0.mp4", "video_1": "09_13_1.mp4", "question_1": "Does the person squeeze with more force the first time compared to the second time?", "question_2": "Does the person squeeze with less force the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "09_14", "category": "Magnitude", "subtype": "successive", "video_0": "09_14_0.mp4", "video_1": "09_14_1.mp4", "question_1": "Does the cup travel farther the second time compared to the first time?", "question_2": "Does the cup travel farther the first time compared to the second time?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_00", "category": "Direction", "subtype": "translational", "video_0": "14_00_0.mov", "video_1": "14_00_1.mov", "question_1": "From the camera's point of view, is the man walking to the right?", "question_2": "From the camera's point of view, is the man walking to the left?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_01", "category": "Direction", "subtype": "translational", "video_0": "14_01_0.mp4", "video_1": "14_01_1.mp4", "question_1": "Is the cup moving towards the sink?", "question_2": "Is the cup moving away from the sink?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_02", "category": "Direction", "subtype": "translational", "video_0": "14_02_0.mov", "video_1": "14_02_1.mov", "question_1": "Is the man getting closer to the camera?", "question_2": "Is the man moving farther from the camera?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_03", "category": "Direction", "subtype": "translational", "video_0": "14_03_0.mov", "video_1": "14_03_1.mov", "question_1": "From the camera's point of view, is the man moving to the right?", "question_2": "From the camera's point of view, is the man moving to the left?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_04", "category": "Direction", "subtype": "translational", "video_0": "14_04_0.mov", "video_1": "14_04_1.mov", "question_1": "From the camera's point of view, does the pen roll to the right?", "question_2": "From the camera's point of view, does the pen roll to the left?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_05", "category": "Direction", "subtype": "translational", "video_0": "14_05_0.mov", "video_1": "14_05_1.mov", "question_1": "From the camera's point of view, does the pen slide to the right?", "question_2": "From the camera's point of view, does the pen slide to the left?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_06", "category": "Direction", "subtype": "translational", "video_0": "14_06_0.mov", "video_1": "14_06_1.mov", "question_1": "Does the bottle move up?", "question_2": "Does the bottle move down?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_07", "category": "Direction", "subtype": "translational", "video_0": "14_07_0.mov", "video_1": "14_07_1.mov", "question_1": "Does the phone move closer to the camera?", "question_2": "Does the phone move away from the camera?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_08", "category": "Direction", "subtype": "translational", "video_0": "14_08_0.mov", "video_1": "14_08_1.mov", "question_1": "Does the book move closer to the camera?", "question_2": "Does the book move away from the camera?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_09", "category": "Direction", "subtype": "translational", "video_0": "14_09_0.mp4", "video_1": "14_09_1.mp4", "question_1": "Does the cup move away from the camera?", "question_2": "Does the cup move closer to the camera?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_10", "category": "Direction", "subtype": "translational", "video_0": "14_10_0.mp4", "video_1": "14_10_1.mp4", "question_1": "Is the table top moving up?", "question_2": "Is the table top moving down?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_11", "category": "Direction", "subtype": "translational", "video_0": "14_11_0.mp4", "video_1": "14_11_1.mp4", "question_1": "Does the toy car move away from the camera?", "question_2": "Does the toy car move closer to the camera?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_12", "category": "Direction", "subtype": "translational", "video_0": "14_12_0.mov", "video_1": "14_12_1.mov", "question_1": "From the camera's point of view, does the ball roll to the camera's right?", "question_2": "From the camera's point of view, does the ball roll to the camera's left?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "14_13", "category": "Direction", "subtype": "translational", "video_0": "14_13_0.mov", "video_1": "14_13_1.mov", "question_1": "Is the cup moving away from the camera?", "question_2": "Is the cup getting closer to the camera?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "15_00", "category": "Direction", "subtype": "rotational", "video_0": "15_00_0.mov", "video_1": "15_00_1.mov", "question_1": "Is the man bending counter-clock wise?", "question_2": "Is the man bending clock wise?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "15_01", "category": "Direction", "subtype": "rotational", "video_0": "15_01_0.mov", "video_1": "15_01_1.mov", "question_1": "Is the bottle spun clockwise?", "question_2": "Is the bottle spun counter-clockwise?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "15_02", "category": "Direction", "subtype": "rotational", "video_0": "15_02_0.mov", "video_1": "15_02_1.mov", "question_1": "Is the airpods case spun clockwise?", "question_2": "Is the airpods case spun counter-clockwise?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
+{"instance_id": "15_03", "category": "Direction", "subtype": "rotational", "video_0": "15_03_0.mp4", "video_1": "15_03_1.mp4", "question_1": "Is the man spinning clockwise?", "question_2": "Is the man spinning counter-clockwise?", "gold": {"q1_v0": "yes", "q1_v1": "no", "q2_v0": "no", "q2_v1": "yes"}}
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