A Test of the HERA Model: Objects as Stimuli

Document Type


Publication Date



The Hierarchical Encoding/Retrieval Asymmetry (HERA) model (Nyberg, Cabeza, and Tulving, 1996; Tulving, Kapur, Craik, Moscovitch, and Houle, 1994) suggests that episodic memory involves interhemispheric interaction, while semantic memory is a unilateral phenomenon. However, most studies supporting the model have used stimuli processed preferentially by the left- hemisphere. It was hypothesized that hemispheric processing superiority might influence hemispheric interaction in tests of HERA. Using stimuli, both hemispheres are equally capable of processing pictures. Subjects performed a semantic or an episodic task. Results did not replicate those found using letter strings in an identical paradigm, suggesting that HERA might only be applicable for strongly lateralized information.

This document is currently not available here.