Goal: describe how a changed marked opening can affect this setup while holding the broad object/orientation fixed. Proposed codes: AC9SFU02, AC9SFI01, AC9SFI04. Prepare: Model T, change-one, optional two approved measured gaps, Card 58.
- Source · 3 min. Label T FICTIONAL MODEL; actual comparison requires same object, orientation, surface and gentle action with two genuinely measured gaps.
- Read · 4 min. Child reads 12 cm outline against 9 cm gap then 14 cm gap. Identify the gap as the changed feature.
- Model · 5 min. Teacher traces model overlap/inside marks, saying “The drawing makes a prediction; no movement was seen.”
- Child try · 7 min. Card 58: make a before-try prediction for a real approved two-gap setup or describe T's two paper views. If real, adult slides once per gap without force; record each actual result and date.
- Check · 4 min. Child compares prior prediction to actual result only if both exist. An unexpected touch may reflect orientation or strip placement; record it rather than erase it.
- Exit · 2 min. State one setup-specific finding or NOT TESTED.