Looking for answers: eye movements in non-visual cognitive tasks. Ehrlichman, H., Micic, D., Sousa, A., & Zhu, J. Brain Cogn, 64(1):7–20, 2007. ![Looking for answers: eye movements in non-visual cognitive tasks [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex It is not known why people move their eyes when engaged in non-visual cognition. The current study tested the hypothesis that differences in saccadic eye movement rate (EMR) during non-visual cognitive tasks reflect different requirements for searching long-term memory. Participants performed non-visual tasks requiring relatively low or high long-term memory retrieval while eye movements were recorded. In three experiments, EMR was substantially lower for low-retrieval than for high-retrieval tasks, including in an eyes closed condition in Experiment 3. Neither visual imagery nor between-task difficulty was related to EMR, although there was some evidence for a minor effect of within-task difficulty. Comparison of task-related EMRs to EMR during a no-task waiting period suggests that eye movements may be suppressed or activated depending on task requirements. We discuss a number of possible interpretations of saccadic eye movements during non-visual cognition and propose an evolutionary model that links these eye movements to memory search through an elaboration of circuitry involved in visual perception.
@article{ehrlichman_looking_2007,
title = {Looking for answers: eye movements in non-visual cognitive tasks},
volume = {64},
url = {http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17113204},
doi = {10/b852jr},
abstract = {It is not known why people move their eyes when engaged in non-visual cognition. The current study tested the hypothesis that differences in saccadic eye movement rate (EMR) during non-visual cognitive tasks reflect different requirements for searching long-term memory. Participants performed non-visual tasks requiring relatively low or high long-term memory retrieval while eye movements were recorded. In three experiments, EMR was substantially lower for low-retrieval than for high-retrieval tasks, including in an eyes closed condition in Experiment 3. Neither visual imagery nor between-task difficulty was related to EMR, although there was some evidence for a minor effect of within-task difficulty. Comparison of task-related EMRs to EMR during a no-task waiting period suggests that eye movements may be suppressed or activated depending on task requirements. We discuss a number of possible interpretations of saccadic eye movements during non-visual cognition and propose an evolutionary model that links these eye movements to memory search through an elaboration of circuitry involved in visual perception.},
number = {1},
journal = {Brain Cogn},
author = {Ehrlichman, H. and Micic, D. and Sousa, A. and Zhu, J.},
year = {2007},
keywords = {\#nosource, *Memory, *Saccades, Analysis of Variance, Auditory Perception, Female, Humans, Imagery (Psychotherapy), Male, Mental Recall, Models, Neurological, Reaction Time, Visual Pathways/physiology},
pages = {7--20},
}
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In three experiments, EMR was substantially lower for low-retrieval than for high-retrieval tasks, including in an eyes closed condition in Experiment 3. Neither visual imagery nor between-task difficulty was related to EMR, although there was some evidence for a minor effect of within-task difficulty. Comparison of task-related EMRs to EMR during a no-task waiting period suggests that eye movements may be suppressed or activated depending on task requirements. 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