Domain: Humanities and Social Sciences — Architecture & Urban Planning
Target concept: Visual Comparison of Neoclassical and Rococo Architectural Decorative Features

Video generation prompt: Decorative patterns in a two-column layout: the left side features a geometric scroll pattern in the Neoclassical style, while the right side presents a curvilinear shell pattern in the Rococo style.

Evaluation guide:
(i) Target concept: Visual typology of 18th-century European architectural ornament as encoded in formal syntax (line, symmetry, motif).
Minimum mechanism: The video must encode stylistic distinction via objectively discriminable formal properties, not semantic labels or narration, where geometry vs. curvature, symmetry vs. asymmetry, and modular vs. organic repetition are sufficient for human observers to assign Neoclassical/Rococo without prior expertise.
(ii)Storyline: Frame opens on static, centered, full-frame two-column composition → left region fills with angular, repeating geometric scroll (no curves, no asymmetry) → right region fills with flowing, asymmetrical shell-and-scroll motif (no straight-line dominance, no mirror symmetry) → both patterns remain fully visible, co-present, and spatially segregated until video end → viewpoint remains fixed, lighting uniform, no occlusion or transformation of either pattern.

Manual:
Experimental Procedure
1. Display a fixed-viewpoint, vertically bisected frame.
2. Populate left column exclusively with a Neoclassical geometric scroll pattern (symmetrical, angular, modular).
3. Populate right column exclusively with a Rococo curvilinear shell pattern (asymmetrical, flowing, organic).
Observation of Experimental Phenomena
• Left column shows repeated straight-line and angular motifs with strict bilateral symmetry.
• Right column shows undulating C- and S-scrolls terminating in naturalistic shell forms, with no straight-line dominance.
• Clear visual contrast between rigid geometry (left) and fluid asymmetry (right) is immediately apparent.
Summary of Experimental Principles
Neoclassical decoration emphasizes rational order, symmetry, and antiquity-derived geometry; Rococo decoration prioritizes playful movement, naturalistic ornament, and asymmetrical elegance — exemplified by the shell (coquille) as a signature motif.

Prompt Grounding rubric:
level_1: No two-column layout appears: the frame shows only one pattern, a blank or undifferentiated surface, or content unrelated to ornamental patterns; neither a geometric scroll-type pattern nor a curvilinear shell-type pattern is identifiable anywhere in the frame.
level_2: A two-column layout is present, but the general pattern category is wrong on at least one side: e.g., both columns show the same category of pattern, or the left column shows a curvilinear shell-like pattern while the right column shows an angular geometric one (the two categories are swapped).
level_3: Two-column layout is present with a visible vertical division; the left column contains a scroll-type geometric pattern and the right column contains a shell-type curvilinear pattern in the correct left/right assignment, but the boundary between columns is inconsistent: e.g., part of one column's pattern crosses into the other, or the dividing line is not continuous across the full frame.
level_4: Two-column layout is present with a stable, continuous vertical division for the full duration; the left column displays only a scroll-type geometric pattern and the right column displays only a shell-type curvilinear pattern, correctly matched to their assigned sides throughout, with no swapping of sides and no unrelated imagery entering either column.
level_5: Two-column layout is present with a fixed central viewpoint and a clean, motionless vertical division; the left column is filled edge-to-edge with only a scroll-type geometric pattern and the right column is filled edge-to-edge with only a shell-type curvilinear pattern, with no gaps, no cross-column bleeding of either pattern, and no extraneous object or decorative element appearing outside the two assigned pattern categories.

Scientific and Causal Correctness rubric:
level_1: Neither column's pattern shows any formal property that distinguishes Neoclassical from Rococo ornament: no contrast in line type (straight/angular versus curving), symmetry (mirrored/repeating versus free-flowing), or motif source (architectural geometry versus shell-and-scroll) is visible between the two sides.
level_2: At least one column's formal properties contradict its assigned style: e.g., the left column contains flowing asymmetrical curves or shell-like volutes, or the right column contains a rigid mirrored grid or angular fretwork, so the geometry does not support classifying that side by its intended era.
level_3: The left column shows repeating angular or arced elements arranged with axial symmetry, and the right column shows undulating curves arranged asymmetrically, giving a legible but imperfect style contrast; however, at least one formal rule is broken (e.g., an organic curve appears within the left column's pattern, or a rigid symmetrical grid appears within the right column's pattern), so the Neoclassical/Rococo distinction is only partially consistent.
level_4: The left column shows exclusively Neoclassical-type formal traits: straight lines and simple arcs, mirrored or evenly spaced repetition, no naturalistic shading; the right column shows exclusively Rococo-type formal traits: freehand C- and S-curves, asymmetrical arrangement, shell-derived motifs; each column stays internally consistent with its assigned style with no cross-contamination from the other side's formal vocabulary.
level_5: Every visible line in the left column is straight or a simple circular arc, joined at precise angular junctions and repeating in mirrored or evenly spaced fashion with no naturalistic shading anywhere; every visible line in the right column is a free-flowing C- or S-curve, its shell-derived motifs rendered with soft naturalistic shading and asymmetrical placement, with no straight-edge or mirrored-repetition element anywhere; the two columns share no common line type, symmetry pattern, or motif source.

Spatiotemporal Consistency rubric:
level_1: Severe spatiotemporal breakdown: the two columns merge or overlap, the vertical divider disappears and then reappears, the viewpoint suddenly rotates or zooms, or the left and right patterns swap sides mid-video.
level_2: The two-column structure is visible but unstable: the divider line visibly warps, bows, or pulses; the left/right pattern assignment flips at least once; or the surface behind the patterns changes brightness or texture abruptly, breaking the sense of a single continuous scene.
level_3: The two-column layout stays intact and the divider does not warp or relocate in any major way, but a minor instability is visible: e.g., the divider trembles briefly, one column is momentarily blurred or partly obscured, or there is a single short cut between otherwise-continuous shots.
level_4: The two-column layout is continuously stable for the entire video: the divider stays in the same place, both columns keep the same width-to-width ratio to each other, and brightness looks the same across both columns throughout, without any sudden dimming, flicker, or a shadow appearing on one side but not the other.
level_5: The vertical divider appears perfectly motionless and continuous for the full duration, with both columns visually holding identical height and a constant width ratio to each other; there is no visible drifting, warping, or shifting of the divider or either pattern, no perceptible perspective change, and no momentary blurring or bleeding between columns at any point.