Is entry-level recognition viewpoint invariant or viewpoint dependent?

Subjects decided whether an object drawing matched the entry-level name that immediately pre ceded it in a name-object sequence. When objects in the stimulus set were visually similar with respect to global shape and configuration of parts, response time increased linearly from 0 degrees to 120 degrees for both match and mismatch trials. Similar effects of orientation were found on match trials when objects in the stimulus set were visually dissimilar No effects of orientation were observed when name and drawing did not match in the visually dissimilar condition. 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.