Electrophysiological correlates of the drift diffusion model in visual word recognition

Abstract

This study was designed to explore the electrophysiological correlates of the diffusion models drift rate parameter in cognitive decision making. Eighty-two participants completed a lexical decision task while their stimulus-dependent event-related potentials (ERP) and theta frequency band power were measured. A mass univariate approach was applied to examine the timeline at which correlations were evident. Individual differences in drift rate parameter and condition-wise within-subject differences in drift rates for word emotionality and item repetition were found to be related to amplitude differences in the late positive complex (LPC). No relations to theta frequency band power changes were obtained. The drift rate parameter captures information accumulation of noisy evidence, while LPC amplitudes are discussed to reflect the strength of a memory trace. While these results point to a common underlying cognitive mechanism to explain drift rates and LPC modulation, they also provide a new angle on the timeline of visual word processing following word identification. Further confirmations of the results are needed to approve the LPC as neurophysiological marker of information accumulation. Hum Brain Mapp 38:5616-5627, 2017. © 2017 Wiley Periodicals, Inc.

Reduced theta-band neural oscillatory activity during affective cognitive control in bipolar I disorder

“…Increased theta-band power was associated with faster response execution times in the combined sample and within both BD and HC groups. This is consistent with prior findings regarding theta power during visual face processing in BD (Lasagna et al, 2021), as well as simulation and non-clinical studies indicating relationships between theta oscillations and processing speed/efficiency (Mueller et al, 2017;Smerieri et al, 2010;van Vugt et al, 2012). Across the combined sample and within only BD participants, increased power was also associated with greater discrimination (d') of facial expressions and stronger tendency to respond.…”

Reductions in regional theta power and fronto-parietal theta-gamma phase-amplitude coupling during gaze processing in bipolar disorder

“…We also found that faster-but not more accurate-responses were associated with increased theta power and theta-gamma PAC. These findings align with results from simulations and non-clinical samples showing relations between theta oscillations and processing speed/efficiency (Mueller et al, 2017;Smerieri et al, 2010;van Vugt et al, 2012). In those studies, decreased theta was associated with slower/less efficient processing.…”

Brain Processes While Struggling With Evidence Accumulation During Facial Emotion Recognition: An ERP Study

“…Instead of running statistical analysis on RTs per se , we computed variables of interest resulting from a DDM analysis of RTs, as described in “Introduction” section. These DDM parameters were computed on RTs for correct and incorrect answers using Fast-dm software (Voss et al, 2004 ; Voss and Voss, 2007 ) after excluding RTs greater than mean + 3 SD on an intra-individual basis for each condition separately, along the same lines as other authors aiming to investigate the electrophysiological correlates of decision-making with diffusion models (e.g., Mueller et al, 2017 ). DDM is typically applied to two alternative decision tasks, whereas in our case we used a five (emotional expressions) forced-choice task.…”