The significant amount of variance in head-related transfer functions (HRTFs) resulting from source location and subject dependencies have led researchers to use principal components analysis (PCA) to approximate HRTFs with a small set of basis functions. PCA minimizes a mean-square error, and consequently may spend modeling effort on perceptually irrelevant properties. To investigate the extent of this effect, PCA performance was studied before and after removal of perceptually irrelevant variance. The results indicate that from the sixth PCA component onward, a substantial amount of perceptually irrelevant variance is being accounted for.
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Q J Exp Psychol (Hove)
December 2024
University of Lincoln, School of Psychology, College of Health and Science, Lincoln, United Kingdom.
There is evidence that congenitally blind individuals possess superior auditory perceptual skills compared to sighted people. However, relatively little is known about the auditory-specific cortical correlates of spatial attention in the blind and how task-irrelevant emotional stimulus features could further modulate such neural processes. This study tested blind and sighted participants in a challenging auditory discrimination task.
View Article and Find Full Text PDFJ Behav Ther Exp Psychiatry
March 2025
Department of Neuroscience, Imaging and Clinical Science, University "G. d'Annunzio" Chieti-Pescara, Via Luigi Polacchi, 11 66103 Chieti (CH), Italy.
Background And Objectives: Clinical practice reveals that individuals with autism characterized by the absence of cognitive impairment (High Functioning Autism-HFA) show difficulty in sharing attention with unfamiliar people. We hypothesized that this difficulty could affect cognitive control by selectively impairing stimulus-encoding or response-selection.
Methods: Twenty-one HFA and 23 neurotypical adults were involved in a two-phase study.
Sci Rep
November 2024
Cognitive and Systems Neuroscience, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, The Netherlands.
The arousal systems of the brainstem, specifically the locus coeruleus-noradrenaline system, respond "phasically" during decisions. These central arousal transients are accompanied by dilations of the pupil. Mechanistic attempts to understand the impact of phasic arousal on cognition would benefit from temporally precise experimental manipulations.
View Article and Find Full Text PDFProc Biol Sci
November 2024
Sofia University 'St. Kliment Ohridski', Sofia 1504, Bulgaria.
It is well known that perception and cognition are systematically biased towards the recent past. That is, a decision about the current state of a perceptual feature (e.g.
View Article and Find Full Text PDFFront Psychol
October 2024
Department of Neurocognition and Action-Biomechanics, Faculty of Sport Sciences, Bielefeld University, Bielefeld, Germany.
Introduction: Visuocognitive performance is closely related to expertise in chess and has been scrutinized by several investigations in the last decades. The results indicate that experts' decision-making benefits from the chunking process, perception and visual strategies. Despite numerous studies which link these concepts, most of these investigations have employed common research designs that do not use real chess play, but create artificial laboratory conditions via screen-based chess stimuli and obtrusive stationary eye tracking with or without capturing of decision-making or virtual reality settings.
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