Domain: Engineering — Structural Engineering
Target concept: The enhancing effect of shear walls on the seismic resistance of structures

Video generation prompt: Two shear wall frame models of the same height are placed side by side on the desk. The left model has 2 shear walls, while the right model has 4 shear walls. Identical seismic vibrations are applied to both models, and the differences in lateral displacement between the two sides are observed.

Evaluation guide:
(i) Target concept: Lateral stiffness enhancement via shear wall quantity in framed structures.
Minimum mechanism: Shear walls act as vertical cantilevers resisting lateral load; an increased number of shear walls directly increases global lateral stiffness (k), reducing displacement (δ = F/k) under identical force F.
(ii)Storyline: Frame 1 (left, 2 walls) and Frame 2 (right, 4 walls) enter scene already positioned side-by-side on desk, fully static. Vibration stimulus initiates synchronously (visible as base shake or jolt affecting both equally). During stimulus, Frame 1 bends visibly farther than Frame 2 — this differential displacement must be continuously observable without occlusion. Stimulus ends; both frames recover fully to original upright posture. Entire sequence viewed from fixed frontal perspective, no camera motion, no zoom, no cutaways.

Manual:
Experimental Procedure
1. Place two identical-height frame models side-by-side on a flat desk.
2. Ensure left model has exactly 2 shear walls; right model has exactly 4 shear walls.
3. Apply identical lateral seismic vibration simultaneously to both models via shared base.
Observation of Experimental Phenomena
During vibration, the left model (2 shear walls) exhibits greater lateral displacement than the right model (4 shear walls); both return to upright position after vibration stops.
Summary of Experimental Principles
Shear walls increase lateral stiffness and reduce inter-story drift; more shear walls → higher seismic resistance → smaller lateral displacement under identical seismic load.

Prompt Grounding rubric:
level_1: No two frame models are placed together; one or both models are missing; no seismic-vibration input is applied to anything; there is no way to tell which model is meant to be the left (2-wall) one versus the right (4-wall) one.
level_2: Both frame models appear but are not set next to each other on the same surface (e.g., one is far away, stacked, or off to the side); one model is missing its shear walls entirely; the vibration is applied to only one model or the two models are not shown starting to shake together; the viewing angle makes it unclear that the two sit side by side.
level_3: Two frame models of the same height stand side by side on the same desk; the left model shows exactly 2 shear-wall panels and the right model shows exactly 4; a shared shaking motion (e.g., the desk or a base plate moving) is applied to both models, starting and ending together; the camera stays put and keeps both models in view throughout.
level_4: Everything required at level 3, plus: the left and right models share identical columns and beams and differ only in shear-wall count; the shear walls are clearly flat, wall-like panels built into the frame (not decorative strips or free-standing boards); the shaking reaches both models through the same base at the same moment, so neither model visibly starts moving before the other.
level_5: Everything required at level 4, plus: the 2-wall count on the left and 4-wall count on the right are unambiguous at a glance (no wall hidden behind a column or cropped out of frame); the shear walls sit at matching heights/positions in both models; both models sit still before the shaking starts and move only once it begins; the camera never cuts away, zooms, or pans, keeping the side-by-side comparison in one continuous shot.

Scientific and Causal Correctness rubric:
level_1: The two models sway by about the same amount, only one model moves at all, or the model with more shear walls (right, 4 walls) sways farther than the one with fewer (left, 2 walls) -- any of these contradicts the stiffness relationship being tested.
level_2: Both models move, but the difference in how far each sways is not noticeable, or the two models lean in unrelated directions rather than in a comparable side-on sway, or one model keeps swaying after the shaking has visibly stopped.
level_3: While the shaking is happening, the left model (2 shear walls) sways noticeably farther sideways than the right model (4 shear walls); once the shaking ends, both models settle back to standing upright; the sway is a side-to-side lean rather than a twist or collapse.
level_4: Everything required at level 3, plus: the gap between how far the left model leans and how far the right model leans is obvious at a glance rather than a subtle difference one has to search for; neither model buckles, loses a wall, or breaks apart during the shaking; the sway builds up and settles down smoothly rather than snapping or jerking.
level_5: Everything required at level 4, plus: the left model's sway visibly grows from its base toward its top, and the right model shows a clearly smaller lean at every matching height; after the initial sway there is no extra back-and-forth beyond settling once; both models keep their floors and shear walls moving together as single stiff bodies rather than parts sliding relative to each other.

Spatiotemporal Consistency rubric:
level_1: Either model jumps to a new spot between frames; the room lighting suddenly changes; the models suddenly change size; a shear wall or beam flickers out of view and comes back partway through; the camera jumps or spins for no physical reason.
level_2: One model is partly blocked from view right when the sway is happening; the wall-count setup and the shaking are shown as separate clips with mismatched lighting or background; the camera zooms or pans while the models are shaking; a shear wall changes color or texture mid-sway; the desk surface appears to shift on its own, separate from the models.
level_3: Both models stay fully visible and intact the whole time; the camera holds one fixed framing and distance throughout with no cuts; the models' motion looks continuous rather than skipping between poses.
level_4: Everything required at level 3, plus: neither model's outline looks warped or bent out of its straight rectangular shape; the shear walls keep straight vertical edges as the models sway, without looking bent or torn; the desk stays flat and doesn't tilt or wobble; the shaking starts and stops smoothly rather than juddering or stuttering.
level_5: Everything required at level 4, plus: there is no visible shake or wobble in the camera image itself; the size relationship between the left and right models stays constant throughout, with neither appearing to grow or shrink relative to the other; the models begin swaying essentially as soon as the base shaking starts, with no noticeable pause between the shaking and the models' response.