Executive control, performance monitoring, selective attention
I am investigating the neurocognitive basis of perceptual decision-making. More specifically, I am interested in examining the interplay between selective attention and performance monitoring (the cognitive process that allows us to evaluate our performance on a task). I am investigating how these cognitive processes enable perceptual decision-making when sensory inputs are ambiguous, as is often the case in the real world. My research takes advantage of electroencephalography, event-related brain potentials (ERPs) and brain stimulation techniques such as transcranial alternating current stimulation (tACS) to characterize the neural underpinnings of these cognitive processes.
Roberts DM, Fedota JR, Buzzell GA, Parasuraman R & McDonald CG (2014) Prestimulus oscillations in the alpha band of the EEG are modulated by the difficulty of feature discrimination and predict activation of a sensory discrimination process. Journal of Cognitive Neuroscience 26(8): 1615-1628.
Buzzell GA, Roberts DM, Baldwin CL & McDonald CG (2013) An electrophysiological correlate of conflict processing in an auditory spatial Stroop task: The effect of individual differences in navigational style. International Journal of Psychophysiology 90: 265-271.
Fedota JR, McDonald CG, Roberts DM & Parasuraman R (2012) Contextual task difficulty modulates stimulus discrimination: Electrophysiological evidence for interaction between sensory and executive processes. Psychophysiology 49: 1384-1993.
PSYC 372 Physiological Psychology
PSYC 375 Brain and Sensory Processes
PSYC 592 Animal Models
PSYC 701 Cognitive Bases of Behavior