| Abstract: | Half of the Ss in the training phase of Exp 1 named objects shown in a number of orientations, whereas the other half named objects shown upright only. Ss named objects seen in a number of different orientations in the transfer phase. Half of the objects in the transfer phase were the ones seen in the training phase (old objects), whereas the other half were objects they had not seen before (new objects). Mean naming time in the transfer phase increased more as the objects were rotated further from the upright for new objects than for old objects when the old objects had been seen in a variety of orientations. A substantial and equivalent orientation effect on identification time was obtained for old and new objects when the old objects had been seen upright only. Results suggest that the extraction and use of orientation-invariant attributes to identify objects is not a default identification strategy employed by the visual system. In Exp 2, half of the objects named in the training phase were shown upright only; the other half were shown in a number of orientations. Both (upright vs rotated) were presented in a mixed fashion from trial to trial. Results reveal that prior naming of the objects in this context resulted in equivalent reductions in the magnitude of the orientation effect on identification time for both sets of objects. The results of these 2 experiments suggest that different representations of objects are encoded, depending on the context in which objects are seen. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
