Parallel attentional facilitation of features and objects in early visual cortex

Nika Adamian, Søren K. Andersen* (Corresponding Author), Steven A. Hillyard

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Selective attention can enhance the processing of attended features across the entire visual field. Attention also spreads within objects, enhancing all internal locations and task‐irrelevant features of selected objects. Here, we examine the extent to which attentional enhancement of a feature spreads across attended and unattended objects. Two fully overlapping counter‐rotating bicolored surfaces of light and dark random dots were presented on a gray background of intermediate luminance. This stimulus creates a percept of two separate semitransparent surfaces and allows the measurement of feature‐ and object‐based selections while controlling spatial attention. On each trial, human participants attended to a subset of dots defined by feature (luminance polarity) and object (surface) in order to detect brief episodes of radial motion while ignoring any events in the unattended groups of dots. Attentional selection was assessed by means of steady‐state visual evoked potentials (SSVEPs) and behavioral measures. SSVEP amplitudes recorded at medial occipital electrode sites were modulated both by surface‐based and luminance polarity‐based selection in a manner consistent with independent multiplicative enhancement of attentional effects in different dimensions in early visual cortex. This finding supports the view that feature‐based attention spreads across object boundaries, at least at an early stage of processing. However, SSVEPs elicited at more lateral electrode sites showed a hierarchical pattern of selection, potentially reflecting the binding of surface‐defining features with luminance features to enable surface‐based attention.
Original languageEnglish
Article number13498
Number of pages11
JournalPsychophysiology
Early online date6 Nov 2019
DOIs
Publication statusE-pub ahead of print - 6 Nov 2019

Fingerprint

Visual Cortex
Visual Evoked Potentials
Electrodes
Visual Fields
Light

Keywords

  • attention
  • content/topics
  • EEG
  • feature-based attention
  • methods
  • object-based attention
  • steady-state visual evoked potentials
  • LOCATIONS
  • topics
  • SELECTIVE ATTENTION
  • MECHANISMS
  • content
  • RESPONSES
  • MOTION
  • COLOR
  • TRACKING
  • DYNAMICS
  • INTERVALS
  • MODULATION

Cite this

Parallel attentional facilitation of features and objects in early visual cortex. / Adamian, Nika; Andersen, Søren K. (Corresponding Author); Hillyard, Steven A.

In: Psychophysiology, 06.11.2019.

Research output: Contribution to journalArticle

@article{c21ac10e2a914b529afd375acb07619b,
title = "Parallel attentional facilitation of features and objects in early visual cortex",
abstract = "Selective attention can enhance the processing of attended features across the entire visual field. Attention also spreads within objects, enhancing all internal locations and task‐irrelevant features of selected objects. Here, we examine the extent to which attentional enhancement of a feature spreads across attended and unattended objects. Two fully overlapping counter‐rotating bicolored surfaces of light and dark random dots were presented on a gray background of intermediate luminance. This stimulus creates a percept of two separate semitransparent surfaces and allows the measurement of feature‐ and object‐based selections while controlling spatial attention. On each trial, human participants attended to a subset of dots defined by feature (luminance polarity) and object (surface) in order to detect brief episodes of radial motion while ignoring any events in the unattended groups of dots. Attentional selection was assessed by means of steady‐state visual evoked potentials (SSVEPs) and behavioral measures. SSVEP amplitudes recorded at medial occipital electrode sites were modulated both by surface‐based and luminance polarity‐based selection in a manner consistent with independent multiplicative enhancement of attentional effects in different dimensions in early visual cortex. This finding supports the view that feature‐based attention spreads across object boundaries, at least at an early stage of processing. However, SSVEPs elicited at more lateral electrode sites showed a hierarchical pattern of selection, potentially reflecting the binding of surface‐defining features with luminance features to enable surface‐based attention.",
keywords = "attention, content/topics, EEG, feature-based attention, methods, object-based attention, steady-state visual evoked potentials, LOCATIONS, topics, SELECTIVE ATTENTION, MECHANISMS, content, RESPONSES, MOTION, COLOR, TRACKING, DYNAMICS, INTERVALS, MODULATION",
author = "Nika Adamian and Andersen, {S{\o}ren K.} and Hillyard, {Steven A.}",
note = "ACKNOWLEDGMENTS This work was supported by a stipend from the Deutsche Forschungsgemeinschaft (AN 841/1‐1) and a grant from the BBSRC (BB/P002404/1) to S.K.A. We thank Jennifer Padwal for help with data collection and Matt Marlow for technical support.",
year = "2019",
month = "11",
day = "6",
doi = "10.1111/psyp.13498",
language = "English",
journal = "Psychophysiology",
issn = "0048-5772",
publisher = "Wiley-Blackwell",

}

TY - JOUR

T1 - Parallel attentional facilitation of features and objects in early visual cortex

AU - Adamian, Nika

AU - Andersen, Søren K.

AU - Hillyard, Steven A.

N1 - ACKNOWLEDGMENTS This work was supported by a stipend from the Deutsche Forschungsgemeinschaft (AN 841/1‐1) and a grant from the BBSRC (BB/P002404/1) to S.K.A. We thank Jennifer Padwal for help with data collection and Matt Marlow for technical support.

PY - 2019/11/6

Y1 - 2019/11/6

N2 - Selective attention can enhance the processing of attended features across the entire visual field. Attention also spreads within objects, enhancing all internal locations and task‐irrelevant features of selected objects. Here, we examine the extent to which attentional enhancement of a feature spreads across attended and unattended objects. Two fully overlapping counter‐rotating bicolored surfaces of light and dark random dots were presented on a gray background of intermediate luminance. This stimulus creates a percept of two separate semitransparent surfaces and allows the measurement of feature‐ and object‐based selections while controlling spatial attention. On each trial, human participants attended to a subset of dots defined by feature (luminance polarity) and object (surface) in order to detect brief episodes of radial motion while ignoring any events in the unattended groups of dots. Attentional selection was assessed by means of steady‐state visual evoked potentials (SSVEPs) and behavioral measures. SSVEP amplitudes recorded at medial occipital electrode sites were modulated both by surface‐based and luminance polarity‐based selection in a manner consistent with independent multiplicative enhancement of attentional effects in different dimensions in early visual cortex. This finding supports the view that feature‐based attention spreads across object boundaries, at least at an early stage of processing. However, SSVEPs elicited at more lateral electrode sites showed a hierarchical pattern of selection, potentially reflecting the binding of surface‐defining features with luminance features to enable surface‐based attention.

AB - Selective attention can enhance the processing of attended features across the entire visual field. Attention also spreads within objects, enhancing all internal locations and task‐irrelevant features of selected objects. Here, we examine the extent to which attentional enhancement of a feature spreads across attended and unattended objects. Two fully overlapping counter‐rotating bicolored surfaces of light and dark random dots were presented on a gray background of intermediate luminance. This stimulus creates a percept of two separate semitransparent surfaces and allows the measurement of feature‐ and object‐based selections while controlling spatial attention. On each trial, human participants attended to a subset of dots defined by feature (luminance polarity) and object (surface) in order to detect brief episodes of radial motion while ignoring any events in the unattended groups of dots. Attentional selection was assessed by means of steady‐state visual evoked potentials (SSVEPs) and behavioral measures. SSVEP amplitudes recorded at medial occipital electrode sites were modulated both by surface‐based and luminance polarity‐based selection in a manner consistent with independent multiplicative enhancement of attentional effects in different dimensions in early visual cortex. This finding supports the view that feature‐based attention spreads across object boundaries, at least at an early stage of processing. However, SSVEPs elicited at more lateral electrode sites showed a hierarchical pattern of selection, potentially reflecting the binding of surface‐defining features with luminance features to enable surface‐based attention.

KW - attention

KW - content/topics

KW - EEG

KW - feature-based attention

KW - methods

KW - object-based attention

KW - steady-state visual evoked potentials

KW - LOCATIONS

KW - topics

KW - SELECTIVE ATTENTION

KW - MECHANISMS

KW - content

KW - RESPONSES

KW - MOTION

KW - COLOR

KW - TRACKING

KW - DYNAMICS

KW - INTERVALS

KW - MODULATION

UR - http://www.scopus.com/inward/record.url?scp=85074787292&partnerID=8YFLogxK

U2 - 10.1111/psyp.13498

DO - 10.1111/psyp.13498

M3 - Article

JO - Psychophysiology

JF - Psychophysiology

SN - 0048-5772

M1 - 13498

ER -