Ben Zobel (PhD Candidate in PBS) will be presenting A neurobehavioral test of discrete-state and continuous recognition memory models in the Cognitive Brown Bag series in Tobin 521B at noon Wednesday, April 15. Everyone is welcome – the abstract is below.
Abstract: Behavioral and ERP measures were used to test the predictions of two models of recognition memory: 1) the Double High-Threshold Model (2HT), which posits that recognition memory involves judgements based on discrete mental states, and Signal Detection Theory (SDT), which posits that recognition memory involves judgements based on continuous values of memory strength. Behavioral analysis provided strong evidence in support of SDT and against 2HT. However, ERP analysis of the FN400, a putative index of memory strength, was not consistent with either model, suggesting that 1) the FN400 may not be a comprehensive index of memory strength, as previously assumed, but may only be useful at sufficiently high levels of strength, or 2) the FN400 may not index strength at all, but may instead represent an N400 effect facilitated by semantic/conceptual priming arising from word repetition (Voss and Federmeier, 2011).