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Reliability and correlates of intra-individual variability in the oculomotor system

Perquin, Marlou and Bompas, Aline 2019. Reliability and correlates of intra-individual variability in the oculomotor system. Journal of Eye Movement Research 12 (6) , 11. 10.16910/jemr.12.6.11

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Even if all external circumstances are kept equal, the oculomotor system shows intra-individual variability over time, affecting measures such as microsaccade rate, blink rate, pupil size, and gaze position. Recently, some of these measures have been associated with ADHD on a between-subject level. However, it remains unclear to what extent these measures constitute stable individual traits. In the current study, we investigate the intra-individual reliability of these oculomotor features. Combining results over three experiments (>100 healthy participants), we found evidence for intra-individual reliability over different time points (repeatability) as well as over different conditions (generalization). Furthermore, we correlated oculomotor variability with self-assessed ADHD tendencies, mind wandering, and impulsivity, and found evidence against such correlations. As such, the oculomotor system shows reliable intra-individual reliability, but its use for distinguishing self-assessed individual differences in healthy subjects remains unclear. With our results, we highlight the importance of reliability and statistical power when studying between-subject differences.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Cardiff University Brain Research Imaging Centre (CUBRIC)
Publisher: Bern Open Publishing
ISSN: 1995-8692
Date of First Compliant Deposit: 16 October 2019
Date of Acceptance: 15 October 2019
Last Modified: 20 Dec 2019 11:42

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