Detecting unreported recalls in memory experiments
AbstractWe investigate the role of discarded memory retrievals in experiments on free recall from lists of items. Such retrievals are not explicitly reported but testable predictions can be derived by assuming that they correlate with a delay in the timings of recall. We report on three situations where such a delay occurs: if the final item was already recalled (“silent recency effect”); if the item that, within the list, follows the latest recalled item was already recalled (“silent contiguity effect”); and in sequential recalls within highly performing trials (“sequential slowdown”). All these effects can be reproduced by a minimal model where the discarding of memories (“bouncing”) occurs either if they are repetitious or, in strategically organized trials, if they are not sequential. Based on our findings we propose various approaches to further probing the submerged dynamics of memory retrieval.