Using morphs of familiar objects to examine how shape discriminability 
influences view sensitivity

Lawson, R; Bülthoff, HH

doi:10.3758/PP.70.5.853

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Using morphs of familiar objects to examine how shape discriminability influences view sensitivity

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Bülthoff, HH
Max Planck Institute for Biological Cybernetics, Max Planck Society;
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Lawson, R., & Bülthoff, H. (2008). Using morphs of familiar objects to examine how shape discriminability influences view sensitivity. Perception and Psychophysics, 70(5), 853-877. doi:10.3758/PP.70.5.853.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-C82B-3

Abstract

We investigated how the difficulty of detecting a shape change influenced the achievement of object constancy across depth rotations for object identification and categorization tasks. In three sequential matching experiments, people saw pictures of morphs between two everyday, nameable objects (e.g., bath-sink morphs, along a continuum between bath and sink end-point shapes). In each experiment, both view changes and shape changes influenced performance. Furthermore, the deleterious effects of view changes were strongest when shape discrimination was hardest. In our earlier research, using morphs of novel objects, we found a similar interaction between view sensitivity and shape sensitivity (Lawson, 2004b; Lawson Bülthoff, 2006; Lawson, Bülthoff, Dumbell, 2003). The present results extend these findings to familiar-object morphs. They suggest that recognition remains view-sensitive at the basic level of identification for everyday, nameable objects, and that the difficulty of shape discrimination plays a critical role in determining the degree of this view sensitivity.