Domain: Healthcare — Pharmacy
Target concept: A sustained-release tablet containing food coloring dissolves slowly in water, in contrast to immediate-release.

Video generation prompt: Two transparent glass beakers containing still distilled water are placed side by side; a thick, multi-layered blue dye tablet is added to the left beaker, and a small, uncoated dye tablet of a different color is added to the right beaker. The process is observed continuously for several minutes.

Evaluation guide:
(i) Target concept: Differential dissolution kinetics governed by pharmaceutical formulation design.
Minimum mechanism: Tablet must retain physical integrity while releasing solute gradually (sustained) versus immediate structural failure enabling bulk release (rapid); water must act as passive dissolution medium without convection or agitation; color serves as direct visual proxy for solute concentration gradient.
(ii)Storyline: Frame opens on static shot of two identical beakers with still water → left hand places blue tablet into left beaker (visible descent and water contact) → right hand places non-blue tablet into right beaker (visible descent and water contact) → left beaker shows progressive, confined blue halo formation with intact tablet core → right beaker shows rapid tablet fragmentation and uniform color fill → contrast in spatial extent, intensity, and temporal progression of color diffusion is continuously visible and unambiguous; fixed frontal viewpoint ensures side-by-side comparison remains geometrically faithful throughout.

Manual:
Experimental Procedure
1. Place two identical transparent glass beakers side-by-side on a neutral background.
2. Fill both beakers to same level with still distilled water.
3. Add one thick, multi-layered blue dye tablet to the left beaker.
4. Add one small, uncoated dye tablet of a different color to the right beaker.
5. Observe continuously for several minutes, giving the slow-release halo enough time to visibly expand.
Observation of Experimental Phenomena
- Left beaker: slow, localized blue halo expands gradually from intact tablet; tablet retains shape and coating.
- Right beaker: rapid tablet disintegration followed by full, vivid color dispersion throughout water.
Summary of Experimental Principles
Sustained-release tablets use polymer coatings or matrix systems to delay dissolution; rapid-release tablets lack such barriers, enabling immediate disintegration and dye release in aqueous media.

Prompt Grounding rubric:
level_1: The scene does not show two transparent beakers of still water placed next to each other; or no thick, multi-layered blue tablet appears; or no small, uncoated tablet of a different color appears; or the two tablets end up together in one beaker instead of separate beakers; or neither beaker actually contains distilled water.
level_2: Two transparent beakers sit side by side with water in them, but something is missing: one beaker has no water or its water is visibly disturbed before anything is added, the two tablets look identical to each other in color and shape rather than one thick/layered blue tablet and one small/uncoated tablet of another color, only one tablet is ever added, or both tablets end up in the same beaker.
level_3: Two transparent beakers of still distilled water sit side by side; a thick, layered blue tablet drops into one beaker and a smaller, plain-surfaced tablet of a different color drops into the other; and the two tablets are visually distinguishable from each other by color and shape, even if the shape difference is subtle.
level_4: Beyond score 3, the size and surface contrast between the two tablets is unmistakable: one clearly reads as thicker or layered, the other as small and plain-surfaced; and both beakers stay in the same place in the frame throughout, with neither beaker nor tablet ever jumping to a new position or dropping out of view.
level_5: Beyond score 4, both beakers hold a fixed camera framing for the entire clip; the layered/coated structure of one tablet and the small, uncoated form of the other stay visible right up until each enters the water; the two tablets enter their beakers together or in quick succession within the first 2 seconds; and both beakers stay fully in frame, undisturbed by any camera cut or reframing, for the whole observation period.

Scientific and Causal Correctness rubric:
level_1: Neither beaker shows any sign of its tablet dissolving; or the two beakers show the same dissolution speed and the same diffusion pattern as each other; or color spreads identically fast (or identically slow) from both tablets; or the blue color shows up in the wrong beaker, or a non-blue color spreads where the blue tablet was placed.
level_2: Only one of the two beakers shows any dissolving at all; or a beaker's tablet colors the water instantly and uniformly with no gradient or spreading front; or the thick, layered tablet's color spreads just as fast as the small, uncoated tablet's; or color starts appearing in a beaker before its tablet has touched the water.
level_3: The beaker with the thick, layered tablet shows a small, contained patch of color slowly growing outward around a tablet that still looks mostly intact; the beaker with the small, uncoated tablet shows color spreading out fast and filling much more of the beaker within the first few seconds while that tablet visibly breaks apart. The two beakers show a real difference in speed and spread, even if the gap between them is not yet dramatic.
level_4: Beyond score 3, the contrast is easy to tell at a glance: the layered tablet keeps its coated shape while only a modest halo of color slowly widens around it, and the uncoated tablet visibly crumbles or breaks apart while its color fills the surrounding water broadly and quickly. Neither beaker behaves like the other.
level_5: Beyond score 4, the layered tablet stays fully intact with its structure visible the whole time, releasing only a narrow, slowly widening ring of color with no sudden burst; the uncoated tablet falls apart quickly and its color fills the entire beaker uniformly soon after; there is no color bleeding between the two beakers, and the visible link between each tablet's structure and its dissolving speed is unmistakable.

Spatiotemporal Consistency rubric:
level_1: A beaker changes position, size, or angle abruptly between shots; the water surface ripples suddenly with no tablet having touched it; the scene's brightness flashes or the shadows jump to a new angle instantly; a tablet appears already inside the water with no entry ever shown; or the camera cuts or jumps mid-clip.
level_2: The frame drifts or jitters noticeably; one beaker is blocked from view for a large portion of the clip; a tablet appears in the water without any visible drop or fall leading up to it; the water sits unnaturally rippled before any tablet has entered it; or the shadows on the beakers shift inconsistently over time.
level_3: Both beakers stay fully visible and fixed in the frame; each tablet is shown falling from above and entering the water with a visible small splash or ripple on contact; the water in both beakers is calm and undisturbed before its tablet drops; and the lighting on both beakers stays even and matches a single unmoving light source for the whole clip.
level_4: Beyond score 3, each tablet's fall into the water looks natural, with no floating pause or sudden speed change; the ripple from each tablet's entry stays brief and localized rather than spreading unnaturally; the two beakers keep the same relative scale and spacing throughout, with no drift between them; and no part of the footage freezes or skips.
level_5: Beyond score 4, both beakers keep identical scale, tilt, and spacing from start to finish; each tablet follows a natural falling path into the water and slows down on contact rather than stopping abruptly; the water's surface dips slightly on impact and settles back smoothly; reflections and light on the glass and water stay consistent with one fixed light source; and there is no visible warping, ghosting, or motion smear anywhere in the clip.