The effect of vessel shape on 44 children's performance on the classic water-level drawing task was studied by varying the relations between level and vessel features. When parallelism between level and base at 0° orientation, right-angle relation between level and side at 0°, and both were present, levels were drawn as if immobile after tilting. But when neither cue was present, in a spherical vessel, correct horizontal drawing was predominant. Results are interpreted as showing the importance of ignoring cues from the internal framework.
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References
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BryantP. E.Perception and understanding in young children. London: Methuen, 1974.
