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Front Hum Neurosci. 2013 May 17;7:205. doi: 10.3389/fnhum.2013.00205. eCollection 2013.

Measuring attention using the Posner cuing paradigm: the role of across and within trial target probabilities.

Frontiers in human neuroscience

Dana A Hayward, Jelena Ristic

Affiliations

  1. Department of Psychology, McGill University Montreal, QC, Canada.

PMID: 23730280 PMCID: PMC3656349 DOI: 10.3389/fnhum.2013.00205

Abstract

Numerous studies conducted within the recent decades have utilized the Posner cuing paradigm for eliciting, measuring, and theoretically characterizing attentional orienting. However, the data from recent studies suggest that the Posner cuing task might not provide an unambiguous measure of attention, as reflexive spatial orienting has been found to interact with extraneous processes engaged by the task's typical structure, i.e., the probability of target presence across trials, which affects tonic alertness, and the probability of target presence within trials, which affects voluntary temporal preparation. To understand the contribution of each of these two processes to the measurement of attentional orienting we assessed their individual and combined effects on reflexive attention elicited by a spatially nonpredictive peripheral cue. Our results revealed that the magnitude of spatial orienting was modulated by joint changes in the global probability of target presence across trials and the local probability of target presence within trials, while the time course of spatial orienting was susceptible to changes in the probability of target presence across trials. These data thus raise important questions about the choice of task parameters within the Posner cuing paradigm and their role in both the measurement and theoretical attributions of the observed attentional effects.

Keywords: Posner cuing task; reflexive attention; spatial orienting; tonic alertness; voluntary temporal preparation

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