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Top-Down Attention Is Limited Within but Not Between Feature Dimensions.
J Cogn Neurosci. 2019 08; 31(8):1173-1183.JC

Abstract

In natural vision, processing of spatial and nonspatial features occurs simultaneously; however, the two types of attention in charge of facilitating this processing have distinct mechanisms. Here, we tested the independence of spatial and feature-based attention at different stages of visual processing by examining color-based attentional selection while spatial attention was focused or divided. Human observers attended to one or two of four fields of randomly moving dots presented in both left and right visual hemifields. In the focused attention condition, the target stimulus was defined both by color and location, whereas in the divided attention condition stimuli of the target color had to be attended in both hemifields. Sustained attentional selection was measured by means of steady-state visual evoked potentials elicited by each of the frequency-tagged flickering dot fields. Additionally, target and distractor selection was assessed with ERPs to these stimuli. We found that spatial and color-based attention independently modulated the amplitude of steady-state visual evoked potentials, confirming independent top-down influences on early visual areas. In contrast, P3 amplitudes elicited only by targets and distractors of the attended color were subject to space-based enhancement, suggesting increasing integration of spatial and feature-based selection over the course of perceptual processing.

Authors+Show Affiliations

University of Aberdeen.University of Aberdeen.University of Aberdeen.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30794058

Citation

Adamian, Nika, et al. "Top-Down Attention Is Limited Within but Not Between Feature Dimensions." Journal of Cognitive Neuroscience, vol. 31, no. 8, 2019, pp. 1173-1183.
Adamian N, Slaustaite E, Andersen SK. Top-Down Attention Is Limited Within but Not Between Feature Dimensions. J Cogn Neurosci. 2019;31(8):1173-1183.
Adamian, N., Slaustaite, E., & Andersen, S. K. (2019). Top-Down Attention Is Limited Within but Not Between Feature Dimensions. Journal of Cognitive Neuroscience, 31(8), 1173-1183. https://doi.org/10.1162/jocn_a_01383
Adamian N, Slaustaite E, Andersen SK. Top-Down Attention Is Limited Within but Not Between Feature Dimensions. J Cogn Neurosci. 2019;31(8):1173-1183. PubMed PMID: 30794058.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Top-Down Attention Is Limited Within but Not Between Feature Dimensions. AU - Adamian,Nika, AU - Slaustaite,Elena, AU - Andersen,Søren K, Y1 - 2019/02/22/ PY - 2019/2/23/pubmed PY - 2020/8/18/medline PY - 2019/2/23/entrez SP - 1173 EP - 1183 JF - Journal of cognitive neuroscience JO - J Cogn Neurosci VL - 31 IS - 8 N2 - In natural vision, processing of spatial and nonspatial features occurs simultaneously; however, the two types of attention in charge of facilitating this processing have distinct mechanisms. Here, we tested the independence of spatial and feature-based attention at different stages of visual processing by examining color-based attentional selection while spatial attention was focused or divided. Human observers attended to one or two of four fields of randomly moving dots presented in both left and right visual hemifields. In the focused attention condition, the target stimulus was defined both by color and location, whereas in the divided attention condition stimuli of the target color had to be attended in both hemifields. Sustained attentional selection was measured by means of steady-state visual evoked potentials elicited by each of the frequency-tagged flickering dot fields. Additionally, target and distractor selection was assessed with ERPs to these stimuli. We found that spatial and color-based attention independently modulated the amplitude of steady-state visual evoked potentials, confirming independent top-down influences on early visual areas. In contrast, P3 amplitudes elicited only by targets and distractors of the attended color were subject to space-based enhancement, suggesting increasing integration of spatial and feature-based selection over the course of perceptual processing. SN - 1530-8898 UR - https://www.unboundmedicine.com/medline/citation/30794058/Top_Down_Attention_Is_Limited_Within_but_Not_Between_Feature_Dimensions_ L2 - https://www.mitpressjournals.org/doi/10.1162/jocn_a_01383?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -