Confident failures: Lapses of working memory reveal a metacognitive blind spot
Working memory performance fluctuates dramatically from trial to trial. On many trials, performance is no better than chance. Here, we assessed participants’ awareness of working memory failures. We used a whole-report visual working memory task to quantify both trial-by-trial performance and trial-by-trial subjective ratings of inattention to the task. In Experiment 1 (N = 41), participants were probed for task-unrelated thoughts immediately following 20% of trials. In Experiment 2 (N = 30), participants gave a rating of their attentional state following 25% of trials. Finally, in Experiments 3a (N = 44) and 3b (N = 34), participants reported confidence of every response using a simple mouse-click judgment. Attention-state ratings and off-task thoughts predicted the number of items correctly identified on each trial, replicating previous findings that subjective measures of attention state predict working memory performance. However, participants correctly identified failures on only around 28% of failure trials. Across experiments, participants’ metacognitive judgments reliably predicted variation in working memory performance but consistently and severely underestimated the extent of failures. Further, individual differences in metacognitive accuracy correlated with overall working memory performance, suggesting that metacognitive monitoring may be key to working memory success.
KeywordsVisual working memory Attentional control Metacognition
Research was supported by NIH Grant 5R01 MH087214-08 and Office of Naval Research Grant N00014-12-1-0972. Datasets for all experiments are available online on Open Science Framework at https://osf.io/syv5w/.
K.A. and E.V. designed the experiments and wrote the manuscript. K.A. collected the data and performed analyses.
Compliance with ethical standards
Conflicts of interest
Momentary failures to stay on task have consequences for ongoing task performance, from relatively minor (e.g., slow reaction time) to severe (e.g., a fatal car accident). The ability to monitor ongoing performance may be key to preventing failures. We found that subjective reports of being “on task” tracked working memory (WM) performance, but imperfectly. In particular, participants frequently reported being on task during failures. Unfortunately, on-task reports are wholly subjective, so we measured metacognitive accuracy by comparing trial-by-trial confidence to accuracy. Metacognitive accuracy predicted individual differences in WM performance, suggesting that accurate metacognitive monitoring may be key to WM success.
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