Run #773

done rubric v1 session 79372233 gemini-3.7-flash 2026-09-21 02:21

What the student sent the question as it arrived, then each reading of it

Typed by the student

Question 2: State whether distance is a scalar or a vector quantity.

The audit's reading of the question, which is what the Product AI judged against:

Question 2: State whether distance is a scalar or a vector quantity.

Audit's summary: The student asked to state whether distance is a scalar or vector quantity. The tutor explained that distance is a scalar quantity because it only has magnitude and no direction. The tutor used a combination of Hindi and English to explain the concept and also drew a diagram to illustrate the difference between distance and displacement.

Transcript 1,552 characters · 550 stripped

Read it no speaker labels — tutor and student run together

Hello Saurabh, good evening. Saurabh, आवाज आ रही है, मिरी आपको? Yes, sir. हाँ, कैसे हैं आप, Saurabh? ठीक है, sir. अपना उत्ताई है. ठीक है, तो इसको आपको मैं ऐसे explain कर देता हूँ. Question आपका है कि state with a distance is a scalar or vector quantity, है न? Yes, sir. चलिए, शुरू करते हैं. जैसे कि... Distance Initial position is correct. Use it or I will say Prarambhik Bindu. What do you understand? Initial position is correct. Sir, your voice is not coming. Prarambhik Bindu and Antim Bindu. It is called Displaced. Your voice is not coming. Your voice is not coming, sir. Tell me. Yes, sir. That's why distance is a scalar quantity. Distance means distance. Yes Sir. Okay, you don't know distance. Have you switched from Hindi medium to English medium? From Hindi medium. Okay, your question was in Hindi and English, so I thought you are an English medium student. Distance means distance. Did you understand? Yes Sir. Now I will tell you again in Hindi. Because you said you are from Hindi medium, so I will tell you again. Distance means distance. And displacement means establishment. North, South, East, West यही होता है ना सर थोड़ा हिंदे ही बताईये ना इसको हिंदी में क्या बोलते हैं विस्थापन और आपका क्वेश्चन था distance पर distance यानि दूरी Distance means distance. Displacement is always with direction and distance is only length. There is no direction in it. Now you understood? Yes. Thank you for watching. Thank you very much. Have a good day. You can end the session on your own. You have a lot of good wishes for the board exam. Yes.

What the student sent the question as it arrived, then each reading of it

Typed by the student

Question 2: State whether distance is a scalar or a vector quantity.

The audit's reading of the question, which is what the Product AI judged against:

Question 2: State whether distance is a scalar or a vector quantity.

Transcript 1,552 characters · 550 stripped

Read it no speaker labels — tutor and student run together

Review team

no_issue

Product AI

nothing found

teaching Yes · mistakes No · satisfactory Yes

Each verdict takes your own. Yours is stored against the stack's, so “where is it wrong most often” is a question with an answer.

Work is the right way up The paper and writing are presented upside down (180 degrees rotated).

In Frames 2 through 9, the tutor writes upside down relative to the camera view, making the text and diagrams inverted (upright at 180 degrees).

seen · 95% confident
Your view
Writing is legible at video size Handwriting and diagrams are clear and legible.

Text such as 'Distance', 'Displacement', numerical values (5m, 10m), and directional markings are clearly readable across Frames 3, 7, 8, and 9.

seen · 90% confident
Your view
The work fills the frame A large portion of the right side is occupied by a stack of books.

In Frames 2 to 9, the right third of the frame is blocked by a thick stack of books with red and white tape, though the writing area remains visible on the left.

seen · 85% confident
Your view
Nothing distracting in shot A stack of bound books is visible alongside the workspace.

Frames 2 to 9 clearly show a prominent stack of books bordering the white sheet of paper on the right.

seen · 90% confident
Your view
The student's problem is established The tutor clearly states the question near the beginning.

In the transcript at the start, the tutor states: 'Question आपका है कि state with a distance is a scalar or vector quantity, है न?'

seen · 95% confident
Your view
Work proceeds in followable steps Work develops progressively through visual examples.

Frames 2-6 build an example on a square path, while Frames 7-9 introduce a linear path with directions, boxed conclusions, and coordinate axes.

seen · 90% confident
Your view
It reaches an answer The tutor completes the explanation with boxed final answers.

Frame 9 shows the completed examples with boxed values for distance and displacement along with direction, after which the tutor wraps up.

seen · 90% confident
Your view
Something was actually written Not applicable to a camera session

measured
The concept is named before the working The concept of distance as a scalar/vector quantity is named upfront.

Tutor explicitly mentions: 'Question आपका है कि state with a distance is a scalar or vector quantity, है न?' and explains 'distance is a scalar quantity'.

heard · 95% confident
Your view
Explained rather than jumped to the answer The tutor sets up the concept using illustrative examples.

Right after stating the question, the tutor draws illustrative motion paths (Frames 2-6) to define initial and final positions before reaching the scalar/vector distinction.

heard · 90% confident
Your view
Solved step by step, not in one leap Concepts and solutions are explained in clear steps with diagrams.

Frames 2-9 show the tutor progressively diagramming distance vs. displacement paths and linking direction to displacement step-by-step.

heard · 90% confident
Your view
The session opens properly The tutor greets the student and confirms the question before starting.

The transcript starts with: 'Hello Saurabh, good evening... Question आपका है कि state with a distance is a scalar or vector quantity, है न?'

heard · 95% confident
Your view
No long dead air 1 gaps over 6.0s, 10s total (2% of the session), longest 10s

Silence is below -35.0dB — a crude measure on a phone microphone, so treat a low count as weak evidence rather than proof the tutor was talking.

measured
Your view

Observations judged, but not counted as the lab objecting

The camera holds still picture moves 27.5 on average between keyframes, 0.6 hard jumps/min

Consistent with the camera being handheld — a stand would remove this entirely. A handheld phone measured 35.1. No steady-camera session has been measured yet, so the lower band is a guess.

Not counted: Measured over 183 known-bad and 29 known-good camera sessions (2026-09-21): raised on 87% of the bad and 86% of the good, and the motion distributions are the same shape — median frame difference 25 on the bad set, 27 on the good. No threshold on this number separates them, so it is reported and not counted.

measured
Your view
Exposure is usable average brightness 168.6, 7.3% of frame very dark, 10.2% blown out

Blown-out share is reported but not judged: the subject is white paper, so a good session measures 11-24% there too.

Not counted: Same two sets: it raised 6 of 183 known-bad and 2 of 29 known-good sessions. Both too few to mean anything, and the brightness distributions overlap almost exactly. The earlier reading that it 'fires more on clean sessions' was two sessions out of twenty-nine — noise, not an inverted rule.

measured
Your view
Understanding of the concept is checked Checks are primarily procedural or confirmation checks.

The tutor asks 'What do you understand?' and 'North, South, East, West यही होता है ना' in the transcript, but mostly relies on 'Did you understand?' without deep conceptual probing.

Not counted: Raised on 87% of known-bad and 80% of known-good sessions. The criterion is honest about why in its own `why`: the transcript has no speaker labels, so a real check and a rhetorical 'ok?' are often indistinguishable, and the bar ends up one almost no session clears. Still judged and shown, because reading it beside a recording is how it gets better.

heard
Your view

What the model returned verbatim

{"findings": [
  {"key": "orientation", "verdict": "bad", "headline": "The paper and writing are presented upside down (180 degrees rotated).", "evidence": "In Frames 2 through 9, the tutor writes upside down relative to the camera view, making the text and diagrams inverted (upright at 180 degrees).", "confidence": 0.95},
  {"key": "legibility", "verdict": "ok", "headline": "Handwriting and diagrams are clear and legible.", "evidence": "Text such as 'Distance', 'Displacement', numerical values (5m, 10m), and directional markings are clearly readable across Frames 3, 7, 8, and 9.", "confidence": 0.9},
  {"key": "framing", "verdict": "weak", "headline": "A large portion of the right side is occupied by a stack of books.", "evidence": "In Frames 2 to 9, the right third of the frame is blocked by a thick stack of books with red and white tape, though the writing area remains visible on the left.", "confidence": 0.85},
  {"key": "workspace", "verdict": "weak", "headline": "A stack of bound books is visible alongside the workspace.", "evidence": "Frames 2 to 9 clearly show a prominent stack of books bordering the white sheet of paper on the right.", "confidence": 0.9},
  {"key": "question_captured", "verdict": "ok", "headline": "The tutor clearly states the question near the beginning.", "evidence": "In the transcript at the start, the tutor states: 'Question आपका है कि state with a distance is a scalar or vector quantity, है न?'", "confidence": 0.95},
  {"key": "structure", "verdict": "ok", "headline": "Work develops progressively through visual examples.", "evidence": "Frames 2-6 build an example on a square path, while Frames 7-9 introduce a linear path with directions, boxed conclusions, and coordinate axes.", "confidence": 0.9},
  {"key": "completion", "verdict": "ok", "headline": "The tutor completes the explanation with boxed final answers.", "evidence": "Frame 9 shows the completed examples with boxed values for distance and displacement along with direction, after which the tutor wraps up.", "confidence": 0.9},
  {"key": "concept_named", "verdict": "ok", "headline": "The concept of distance as a scalar/vector quantity is named upfront.", "evidence": "Tutor explicitly mentions: 'Question आपका है कि state with a distance is a scalar or vector quantity, है न?' and explains 'distance is a scalar quantity'.", "confidence": 0.95},
  {"key": "explained_before_solving", "verdict": "ok", "headline": "The tutor sets up the concept using illustrative examples.", "evidence": "Right after stating the question, the tutor draws illustrative motion paths (Frames 2-6) to define initial and final positions before reaching the scalar/vector distinction.", "confidence": 0.9},
  {"key": "concept_checked", "verdict": "weak", "headline": "Checks are primarily procedural or confirmation checks.", "evidence": "The tutor asks 'What do you understand?' and 'North, South, East, West यही होता है ना' in the transcript, but mostly relies on 'Did you understand?' without deep conceptual probing.", "confidence": 0.8},
  {"key": "step_by_step", "verdict": "ok", "headline": "Concepts and solutions are explained in clear steps with diagrams.", "evidence": "Frames 2-9 show the tutor progressively diagramming distance vs. displacement paths and linking direction to displacement step-by-step.", "confidence": 0.9},
  {"key": "opening", "verdict": "ok", "headline": "The tutor greets the student and confirms the question before starting.", "evidence": "The transcript starts with: 'Hello Saurabh, good evening... Question आपका है कि state with a distance is a scalar or vector quantity, है न?'", "confidence": 0.95}
]}

Duration	556s (9.3 min)
Video	960×540 @ 15.0fps
Audio track	yes
Shot changes
Dead air	1 gaps ≥6.0s · 9.5s total · longest 9.5s
Luma	avg 168.6 · min · max
Medium	camera 37.5% flat background
Content written	9.0% → 29.85% (+56.85)
Transcript	1552 characters of speech
Frames	9

Run #773

The recording

What the student sent the question as it arrived, then each reading of it

Transcript 1,552 characters · 550 stripped

What the student sent the question as it arrived, then each reading of it

Transcript 1,552 characters · 550 stripped

Review team

Product AI

Measured

What the model returned verbatim

Frames in order, one every ~62s