Speed of Saccadic Responses and Intelligence: An Exponential-Gaussian Analysis [Invited paper for Special Issue of the Journal]

Research output: Contribution to journalArticle

Abstract

Individual differences in the speed of making rapid eye
movements (saccades) may have potential for exploring the link between
neural conduction and cognitive abilities. Participants (N=56) performed
tasks devised to measure the speed at which humans started to move an eye
towards a stimulus which appeared in peripheral vision (saccade) or in
the opposite direction (anti-saccade). Cognitive abilities were measured
using the Wide Range Intelligence Test, and ex-Gaussian parameters from
the eye-movement tasks were correlated with these abilities. The findings showed that scores on the pro- and anti-saccade tests correlated substantially and that the anti-saccade condition led to consistently longer and more variable and more skewed responses. None of the parameters correlated significantly with the cognitive abilities assessed. The findings do not support the theory that nerve conduction velocity explains the correlation between reaction times and cognitive abilities . However, the findings do provide evidence of the existence of individual differences in saccadic eye-movements that can be captured by ex-Gaussian analysis of reaction time and also show that saccadic movements do not follow Hick's Law when task difficulty is manipulated.
Original languageEnglish
JournalPersonality and Individual Differences
Publication statusAccepted - 22 Jan 2020

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Saccades
Intelligence
Aptitude
Individuality
Reaction Time
Intelligence Tests
Neural Conduction
Eye Movements

Cite this

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title = "Speed of Saccadic Responses and Intelligence: An Exponential-Gaussian Analysis [Invited paper for Special Issue of the Journal]",
abstract = "Individual differences in the speed of making rapid eyemovements (saccades) may have potential for exploring the link betweenneural conduction and cognitive abilities. Participants (N=56) performedtasks devised to measure the speed at which humans started to move an eyetowards a stimulus which appeared in peripheral vision (saccade) or inthe opposite direction (anti-saccade). Cognitive abilities were measuredusing the Wide Range Intelligence Test, and ex-Gaussian parameters fromthe eye-movement tasks were correlated with these abilities. The findings showed that scores on the pro- and anti-saccade tests correlated substantially and that the anti-saccade condition led to consistently longer and more variable and more skewed responses. None of the parameters correlated significantly with the cognitive abilities assessed. The findings do not support the theory that nerve conduction velocity explains the correlation between reaction times and cognitive abilities . However, the findings do provide evidence of the existence of individual differences in saccadic eye-movements that can be captured by ex-Gaussian analysis of reaction time and also show that saccadic movements do not follow Hick's Law when task difficulty is manipulated.",
author = "Paul Wilson and Colin Cooper and Papageorgiou, {Kostas A.}",
year = "2020",
month = "1",
day = "22",
language = "English",
journal = "Personality and Individual Differences",
issn = "0191-8869",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Speed of Saccadic Responses and Intelligence: An Exponential-Gaussian Analysis [Invited paper for Special Issue of the Journal]

AU - Wilson, Paul

AU - Cooper, Colin

AU - Papageorgiou, Kostas A.

PY - 2020/1/22

Y1 - 2020/1/22

N2 - Individual differences in the speed of making rapid eyemovements (saccades) may have potential for exploring the link betweenneural conduction and cognitive abilities. Participants (N=56) performedtasks devised to measure the speed at which humans started to move an eyetowards a stimulus which appeared in peripheral vision (saccade) or inthe opposite direction (anti-saccade). Cognitive abilities were measuredusing the Wide Range Intelligence Test, and ex-Gaussian parameters fromthe eye-movement tasks were correlated with these abilities. The findings showed that scores on the pro- and anti-saccade tests correlated substantially and that the anti-saccade condition led to consistently longer and more variable and more skewed responses. None of the parameters correlated significantly with the cognitive abilities assessed. The findings do not support the theory that nerve conduction velocity explains the correlation between reaction times and cognitive abilities . However, the findings do provide evidence of the existence of individual differences in saccadic eye-movements that can be captured by ex-Gaussian analysis of reaction time and also show that saccadic movements do not follow Hick's Law when task difficulty is manipulated.

AB - Individual differences in the speed of making rapid eyemovements (saccades) may have potential for exploring the link betweenneural conduction and cognitive abilities. Participants (N=56) performedtasks devised to measure the speed at which humans started to move an eyetowards a stimulus which appeared in peripheral vision (saccade) or inthe opposite direction (anti-saccade). Cognitive abilities were measuredusing the Wide Range Intelligence Test, and ex-Gaussian parameters fromthe eye-movement tasks were correlated with these abilities. The findings showed that scores on the pro- and anti-saccade tests correlated substantially and that the anti-saccade condition led to consistently longer and more variable and more skewed responses. None of the parameters correlated significantly with the cognitive abilities assessed. The findings do not support the theory that nerve conduction velocity explains the correlation between reaction times and cognitive abilities . However, the findings do provide evidence of the existence of individual differences in saccadic eye-movements that can be captured by ex-Gaussian analysis of reaction time and also show that saccadic movements do not follow Hick's Law when task difficulty is manipulated.

M3 - Article

JO - Personality and Individual Differences

JF - Personality and Individual Differences

SN - 0191-8869

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