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Reliability of smooth pursuit, fixation, and saccadic eye movements.

Ettinger, Ulrich and Kumari, Veena and Crawford, Trevor J. and Davis, Robert E. and Sharma, Tonmoy and Corr, Philip J. (2003) Reliability of smooth pursuit, fixation, and saccadic eye movements. Psychophysiology, 40 (4). pp. 620-628. ISSN 0048-5772

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Abstract

The present study investigated the reliability and susceptibility to practice effects of oculomotor tasks. Smooth pursuit, fixation, antisaccade, and prosaccade tasks were administered to 31 healthy participants to assess internal consistency (Cronbach’s alpha) and within-session practice effects. Twenty-one of these participants were retested after an average interval of 57.86 days to assess temporal stability and between-session practice effects. Internal consistencies were high for most measures, with few within-session performance changes. Test–retest reliabilities of most measures were good. Between-session practice effects were most consistently observed on the antisaccade task, indicated by reduced error rate and improved spatial accuracy at retest. Magnitude of improvement on these measures was related to performance, indicating that poor performers benefited most from repeated assessment. These findings support the trait nature of oculomotor function and point to the need to take into consideration between-session practice effects on the antisaccade task in longitudinal studies.

Item Type: Article
Journal or Publication Title: Psychophysiology
Uncontrolled Keywords: Smooth pursuit eye movements ; Visual fixation ; Antisaccade ; Prosaccade ; Test–retest reliability ; Internal consistency ; Practice effects
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Departments: Faculty of Science and Technology > Psychology
ID Code: 11154
Deposited By: Dr Trevor Crawford
Deposited On: 04 Aug 2008 09:58
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 14:57
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/11154

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