title: Is reaction time variability consistent across sensory modalities? Insights from latent variable analysis of single-trial P3b latencies.
abstract: Recent years have witnessed a steep increase in cognitive, differential and clinical neuroscience research on the neural basis of intra-subject variability of reaction times. Most theoretical accounts make the implicit assumption that individual differences in intra-subject variability are consistent across sensory modalities, but this remains largely untested. The present EEG study aims to fill this gap by analyzing, for the first time, stimulus- and response-locked single-trial P3bs across visual and auditory sensory modalities, and employing an innovative supra-task latent variables approach. We found unidimensionality of intra-subject variability variables across modalities as well as high correlations between the latency jitter of stimulus- and response-locked P3bs. These findings support the hypothesis that intra-subject variability represents a unitary construct, and that the processes underlying that generalises not only across different cognitive tasks, but also across different sensory modalities.
authors: School of Psychology, Bangor University, United Kingdom.
authors: Christopher W N
authors: CW
authors: Saville
authors: Sailee
authors: S
authors: Shikhare
authors: Sarayu
authors: S
authors: Iyengar
authors: David
authors: D
authors: Daley
authors: James
authors: J
authors: Intriligator
authors: Stephan G
authors: SG
authors: Boehm
authors: Bernd
authors: B
authors: Feige
authors: Christoph
authors: C
authors: Klein
mesh_terms: D000161:Acoustic Stimulation; D001307:Auditory Perception / Q000502:physiology; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D004569:Electroencephalography; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology; D055815:Young Adult