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Hemispheric asymmetries for spatial frequency discrimination in a selective attention task.
Brain Cogn. 1997 Jul; 34(2):311-20.BC

Abstract

Hemispheric specialization for spatial frequency processing was investigated by measuring reaction times to sinusoidal gratings in 12 healthy subjects. Stimuli of 1.5, 3, and 6 c/deg were randomly presented at two peripheral locations in the left (LVF) and right (RVF) upper visual hemifields during a selective attention task. Subjects were instructed to pay covert attention and to respond to a frequency in a given hemifield ignoring all other stimuli. Results showed that RTs were significantly faster at LVF than RVF for low frequency gratings, and at RVF than LVF for high frequency gratings. Furthermore, RTs were faster to 6 than 1.5 c/deg at the RVF, while there was not a significant difference at the LVF. In our view, these findings in a task requiring fast and accurate spatial frequency discriminations may be interpreted in terms of a hemispheric asymmetry for spatial frequency processing.

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Authors+Show Affiliations

Proverbio AM
Dipartimento di Psicologia, Università di Trieste, Italy. Proverbi@uts.univ.trieste.it
Zani A
No affiliation info available
Avella C
No affiliation info available

MeSH

AdolescentAdultAttentionDiscrimination LearningDominance, CerebralElectrooculographyFemaleHumansMaleOrientationPattern Recognition, VisualReaction TimeReference ValuesSpace PerceptionVisual Fields

Pub Type(s)

Clinical Trial
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9220094

Citation

Proverbio, A M., et al. "Hemispheric Asymmetries for Spatial Frequency Discrimination in a Selective Attention Task." Brain and Cognition, vol. 34, no. 2, 1997, pp. 311-20.
Proverbio AM, Zani A, Avella C. Hemispheric asymmetries for spatial frequency discrimination in a selective attention task. Brain Cogn. 1997;34(2):311-20.
Proverbio, A. M., Zani, A., & Avella, C. (1997). Hemispheric asymmetries for spatial frequency discrimination in a selective attention task. Brain and Cognition, 34(2), 311-20.
Proverbio AM, Zani A, Avella C. Hemispheric Asymmetries for Spatial Frequency Discrimination in a Selective Attention Task. Brain Cogn. 1997;34(2):311-20. PubMed PMID: 9220094.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Hemispheric asymmetries for spatial frequency discrimination in a selective attention task. AU - Proverbio,A M, AU - Zani,A, AU - Avella,C, PY - 1997/7/1/pubmed PY - 1997/7/1/medline PY - 1997/7/1/entrez SP - 311 EP - 20 JF - Brain and cognition JO - Brain Cogn VL - 34 IS - 2 N2 - Hemispheric specialization for spatial frequency processing was investigated by measuring reaction times to sinusoidal gratings in 12 healthy subjects. Stimuli of 1.5, 3, and 6 c/deg were randomly presented at two peripheral locations in the left (LVF) and right (RVF) upper visual hemifields during a selective attention task. Subjects were instructed to pay covert attention and to respond to a frequency in a given hemifield ignoring all other stimuli. Results showed that RTs were significantly faster at LVF than RVF for low frequency gratings, and at RVF than LVF for high frequency gratings. Furthermore, RTs were faster to 6 than 1.5 c/deg at the RVF, while there was not a significant difference at the LVF. In our view, these findings in a task requiring fast and accurate spatial frequency discriminations may be interpreted in terms of a hemispheric asymmetry for spatial frequency processing. SN - 0278-2626 UR - https://www.unboundmedicine.com/medline/citation/9220094/Hemispheric_asymmetries_for_spatial_frequency_discrimination_in_a_selective_attention_task_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0278-2626(97)90901-5 DB - PRIME DP - Unbound Medicine ER -