A careful look, one step at a time.

Watch the original video and check the task and each annotation. Your progress is saved so you can return later.

Your invitation code

Use the private invitation provided by the study organizer.

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Speed

Short action? Slow down or repeat the last 3 seconds. Selecting a caption keeps the video at its current time.

Gemini’s task description

Subject

All annotated steps

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Your videos

A quick review guide

Watch the complete video. Judge the original annotations before suggesting repairs. Review every step and then the four whole-video checks.

1 · Correct
The evidence supports the annotation.

0 · Incorrect
The evidence contradicts it. Explain why.

U · Cannot determine
The view or evidence is insufficient. Do not guess.

For each step

Caption correctness: Is the action actually shown, with the correct object and effect?

Atomicity: Does the caption describe one coherent action? “Fold the paper in half” is one action. “Add rice, stir, and serve” contains several. Small incidental hand movements do not need separate steps.

For the whole video

Check whether the task is correctly described, all essential actions are covered, steps follow the demonstrated order, and the final visible state achieves the task goal. Judge completion from the video itself.

Record the evidence

For an incorrect step, add a short explanation; its step number is recorded automatically. For an incorrect whole-video check, also attach a relevant step number or video time. A truly repeated action is not a duplicated annotation.

Suggested corrections are optional and stay separate from the original text. “Cannot determine” is kept separate from incorrect answers.

Very short actions

Use 0.25× or 0.5× speed and the one-second controls. “Repeat 3 s” loops the preceding three seconds (or the first three seconds at the start). Tap it again to stop repeating. There are no supplied step timestamps, so selecting a caption does not seek the video. Attached times are evidence, not reference timing labels.

Saving and invitations

Answers save as drafts automatically. Submit after every step and video check is complete. Keep your invitation: it restores the same reviews on another device. Each person must use their own invitation and work independently. Keep invitations private.