Is dream recall underestimated by retrospective measures and enhanced by keeping a logbook? An empirical investigation.
Consciousness and Cognition May 1, 2016 Denholm J Aspy
Retrospective questionnaires asking people how often they remember dreams produce lower recall rates than daily logbooks, a gap called the retrospective-logbook disparity. One explanation is that retrospective measures underestimate true dream recall; another is that keeping a logbook boosts recall. This study tested both possibilities using several retrospective and logbook measures across three logbook types. The disparity correlated with variables tied to retrospective underestimation and was larger among participants who reported improved recall during the logbook period. The findings suggest that retrospective measures underestimate dream recall and that keeping a logbook enhances it. Recommendations for using each measurement method are offered.