IS ENTRY-LEVEL RECOGNITION VIEWPOINT INVARIANT OR VIEWPOINT DEPENDENT

Subjects decided whether an object drawing matched the entry-level nam e that immediately pre ceded it in a name-object sequence. When object s in the stimulus set were visually similar with respect to global sha pe and configuration of parts, response time increased linearly from 0 degrees to 120 degrees for both match and mismatch trials. Similar ef fects of orientation were found on match trials when objects in the st imulus set were visually dissimilar No effects of orientation were obs erved when name and drawing did not match in the visually dissimilar c ondition. The results are consistent with the view that, in a variety of viewing situations, the initial identification of an object at the entry level is accomplished by viewpoint-dependent mechanisms.