Tip-of-the-tongue states predict enhanced feedback processing and subsequent memory

This article investigates the relations among the tip-of-the-tongue (TOT) state, event related potentials (ERPs) to correct feedback to questions, and subsequent memory. ERPs were used to investigate neurocognitive responses to feedback to general information questions for which participants had expressed either being or not being in a TOT state. For questions in which participants were unable to answer within 3 s, they indicated whether they were experiencing a TOT state and then were immediately provided with the correct answer. Feedback during a TOT state, as opposed to not knowing the answer, was associated with enhanced positivity over centro-parietal electrodes 250-700 ms post-feedback, and this enhanced positivity mediated a positive relationship between TOTs and later recall. Although effects of increased semantic access during TOT states cannot be ruled out, these results suggest that information received during TOT states elicits enhanced processing-suggestive of curiosity-leading to enhanced learning of studied material.