Prospective memory: Are preparatory attentional processes necessary for a single focal cue?

Harrison, Tyler L.; Einstein, Gilles O. · 2010 · OpenAlex-citations

DOI: 10.3758/mc.38.7.860

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Summary

This study investigates the cognitive mechanisms underlying prospective memory (PM), specifically addressing whether resource-demanding preparatory attentional processes are strictly necessary for retrieving intentions triggered by a single focal cue. The research contrasts the Preparatory Attentional and Memory Processes (PAM) theory, which posits that successful PM retrieval requires continuous monitoring of the environment, with the multiprocess theory, which argues that retrieval can also occur spontaneously via reflexive association or discrepancy detection without active monitoring. Previous research by Smith et al. (2007) concluded that preparatory attentional processes are always necessary, citing task interference (slowing on an ongoing task) even when the PM cue was highly salient (the participant’s own name). Harrison and Einstein argue that the presence of task interference does not rule out spontaneous retrieval and aim to demonstrate that high PM performance can occur in the absence of such interference. To test this, the authors conducted an experiment with 126 undergraduate participants using a lexical decision task as the ongoing activity. The design included three conditions: a control group, a PM emphasis group (instructed to prioritize remembering to press a key when their name appeared), and an ongoing task (OT) emphasis group (instructed to prioritize speed on the lexical decision task). The PM target (the participant’s name) was presented late in the second block of trials. The researchers analyzed response times (RTs) and accuracy on the ongoing task across different segments to detect task interference, which serves as a proxy for preparatory attentional processes. They also examined PM performance rates and conducted individual-difference analyses to compare participants who showed a practice effect (speeding up, indicating no monitoring) versus those who did not. The results revealed no evidence of task interference in the OT emphasis condition, indicating that participants were not engaging in preparatory attentional processes. Despite the lack of monitoring costs, PM performance in this condition was high (75%), comparable to the PM emphasis condition (85%). Statistical analyses showed no significant difference in PM performance between participants who exhibited a practice effect (least likely to be monitoring) and those who did not. Specifically, in the OT emphasis condition, 82% of participants who sped up successfully retrieved the PM intention, while 67% of those who did not speed up also succeeded. These findings demonstrate that PM retrieval occurred effectively without the resource-consuming monitoring predicted by the PAM theory. The study concludes that preparatory attentional processes are not necessary for PM retrieval when a single focal cue is present, thereby supporting the multiprocess theory. The findings challenge the interpretation that task interference is a prerequisite for successful PM performance, suggesting instead that spontaneous retrieval mechanisms can drive high levels of prospective memory accuracy. This implies that individuals can rely on automatic, cue-driven retrieval processes rather than continuous strategic monitoring, particularly when the cue is salient and focal.

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• prospective memory interruptions