Fig 21.
Repeated-item interference on a rhesus monkey's three-item list memory results with memory items selected from a six-item set (High PI) compared to a low interference condition with items selected from a 211-item set (Low PI). Serial position 1 was the first list item. Open symbols (diff) show performance on trials (different) where the test item did not match any list item. The dotted line represents chance performance.