Figure 4.

A schematic model of semantic memory search differences in healthy comparison participants (CO, A) and patients with hippocampal damage (HP, B). The central circle labeled T corresponds to the conceptual representation of the target word, and the surrounding circles correspond to potentially reportable features. The gradient represents the strength of support for features based on the target concept. Arrows indicate the sequence of feature responses (f_n) made by the hypothetical participant. The tendency to make transitions to nearby features suggests a search process that is influenced by the most recent response. (A) CO participants make a longer sequence of responses that ranges farther in semantic space. (B) HP participants produce a shorter response sequence that does not range as far from the target concept.