Work

Unintentional covert motor activations predict behavioral effects: Multilevel modeling of trial‐level electrophysiological motor activations

Year: 2010

Type: article

Abstract: The present experiment measured an EEG indicator of motor cortex activation, the lateralized readiness potential (LRP), while participants performed a speeded category classification task. The LRP data showed that visually masked words triggered covert motor activations. These prime-induced motor activations preceded motor activations by subsequent (to-be-classified) visible target words. Multilevel statistical analyses of trial-level effects, applied here for the first time with electrophysiological data, revealed that accuracy and latency of classifying target words was affected by both (a) covert motor activations caused by visually masked primes and (b) spontaneous fluctuations in covert motor activations. Spontaneous covert motor fluctuations were unobserved with standard subject-level (multi-trial) analyses of grand-averaged LRPs, highlighting the utility of multilevel modeling of trial-level effects.

Source: Psychophysiology

DOI: 10.1111/j.1469-8986.2010.01055.x

Authors: Vivian Zayas, Anthony G. Greenwald, Lee Osterhout

Institutions: University of Washington, Cornell University

Language: English

Topic: Free Will and Agency

Subfield: Cognitive Neuroscience

Field: Neuroscience

Domain: Life Sciences

Open Access status: green

Funders: National Institute of Mental Health, National Institute on Deafness and Other Communication Disorders

Awards: G2732647117, G2998578488, Electrophysiology of language processes, CONSISTENCY IN SOCIAL BEHAVIOR