Journal Article


Mark A Bellgrove
Redmond G O'Connell
Simon P Kelly
Petra C van den Bogert
Ana C P Martins
Marco T R Zoratti
Rafael Abe
Gerard M Loughnane
Daniel P Newman



subtypes bias space neural networks models theoretical regression differential cognitive psychology psychology individual differences

Differential shift in spatial bias over time depends on observers׳ initial bias: Observer subtypes, or regression to the mean? (2014)

Abstract Healthy subjects typically exhibit a subtle bias of visuospatial attention favouring left space that is commonly termed 'pseudoneglect'. This bias is attenuated, or shifted rightwards, with decreasing alertness over time, consistent with theoretical models proposing that pseudoneglect is a result of the right hemisphere׳s dominance in regulating attention. Although this 'time-on-task effect' for spatial bias is observed when averaging across whole samples of healthy participants, Benwell, C. S. Y., Thut, G., Learmonth, G., & Harvey, M. (2013b). Spatial attention: differential shifts in pseudoneglect direction with time-on-task and initial bias support the idea of observer subtypes. Neuropsychologia, 51(13), 2747-2756 recently presented evidence that the direction and magnitude of bias exhibited by the participant early in the task (left biased, no bias, or right biased) were stable traits that predicted the direction of the subsequent time-on-task shift in spatial bias. That is, the spatial bias of participants who were initially left biased shifted in a rightward direction with time, whereas that of participants who were initially right biased shifted in a leftward direction. If valid, the data of Benwell et al. are potentially important and may demand a re-evaluation of current models of the neural networks governing spatial attention. Here we use two novel spatial attention tasks in an attempt to confirm the results of Benwell et al. We show that rather than being indicative of true participant subtypes, these data patterns are likely driven, at least in part, by 'regression towards the mean' arising from the analysis method employed. Although evidence supports the contention that trait-like individual differences in spatial bias exist within the healthy population, no clear evidence is yet available for participant/observer subtypes in the direction of time-on-task shift in spatial biases.
Collections Ireland -> National College Ireland -> Status = Published
Ireland -> National College Ireland -> Subject = B Philosophy. Psychology. Religion: Psychology: Cognitive psychology
Ireland -> National College Ireland -> Subject = B Philosophy. Psychology. Religion
Ireland -> Trinity College Dublin -> PubMed
Ireland -> National College Ireland -> Type = Article
Ireland -> National College Ireland -> Subject = B Philosophy. Psychology. Religion: Psychology

Full list of authors on original publication

Mark A Bellgrove, Redmond G O'Connell, Simon P Kelly, Petra C van den Bogert, Ana C P Martins, Marco T R Zoratti, Rafael Abe, Gerard M Loughnane, Daniel P Newman

Experts in our system

Mark A. Bellgrove
Trinity College Dublin
Total Publications: 39
Redmond G O'Connell
Trinity College Dublin
Total Publications: 59
Simon P Kelly
University College Dublin
Total Publications: 48
Gerard M Loughnane
National College Ireland
Total Publications: 17
Daniel P Newman
National College Ireland
Total Publications: 9