Gibson also argued that perceptual experimenters were misguided in their control over physical variables of stimuli, and the display of stimulus information should be manipulated instead.
Samuti vaidles Gibson, et tajuliste eksperimentide puhul on ekslik kontrollida stiimuli füüsilisi muutujaid, selle asemel tuleks manipuleerida stiimuli ilmingulise informatsiooniga.