Gamma Power as an Index of Sustained Attention in Simulated Vigilance Tasks.

Performance on the psychomotor vigilance test (PVT; Dinges & Powell, 1985)-a common index of sustained attention-is affected by the opposing forces of fatigue and sustained effort, where reaction times and error rates typically increase across trials and are sometimes offset by additional efforts deployed toward the end of the task (i.e., an "end-spurt"; cf.

Why do learners ignore expected feedback in making metacognitive decisions about retrieval practice?

We report two experiments investigating why learners, in making metacognitive judgments, often seem to ignore or otherwise fail to appreciate that feedback following retrieval practice provides a restudy opportunity. Learners practiced word pairs for a final cued-recall test by studying each pair initially, making a judgment of learning (JOL), and then deciding whether to practice the pair again after a short or long spacing interval, or not at all. For different groups in Experiment 1, additional practice involved restudying, retrieval practice without feedback, or retrieval practice with feedback (the full pair).