Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Object-based visual attention in luminance increment detection?

G W Stuart1, P Maruff, J Currie

  • 1Neurophysiology and Neurovisual Research Unit, Mental Health Research Institute of Victoria, Parkville, Australia.

Neuropsychologia
|June 1, 1997
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Change in Digital Cognitive Test Performance between Solanezumab and Placebo Groups in Preclinical Alzheimer's Disease: Secondary Analyses from the A4 Study.

The journal of prevention of Alzheimer's disease·2024
Same author

How Modifiable Are Modifiable Dementia Risk Factors? A Framework for Considering the Modifiability of Dementia Risk Factors.

The journal of prevention of Alzheimer's disease·2024
Same author

Two-Year Prognostic Utility of Plasma p217+tau across the Alzheimer's Continuum.

The journal of prevention of Alzheimer's disease·2023
Same author

Associations between Participant Characteristics and Participant Feedback about an Unsupervised Online Cognitive Assessment in a Research Registry.

The journal of prevention of Alzheimer's disease·2023
Same author

Effect of high-flow nasal oxygen on hypoxaemia during procedural sedation: a systematic review and meta-analysis.

Anaesthesia·2022
Same author

Unsupervised Performance of the CogState Brief Battery in the Brain Health Registry: Implications for Detecting Cognitive Decline.

The journal of prevention of Alzheimer's disease·2022
Same journal

Prevalence and modulation of rat off-track head scanning on linear tracks: possible implications for representational and dynamic properties of hippocampal place cells.

Neuropsychologia·2026
Same journal

Identifying networks within an fMRI multivariate searchlight analysis.

Neuropsychologia·2026
Same journal

Modulating sentence comprehension in people with aphasia through anodal tDCS: A double-blind randomized cross-over study.

Neuropsychologia·2026
Same journal

Deficient processing of regularity violations during visuospatial neglect: a visual mismatch negativity study.

Neuropsychologia·2026
Same journal

Seeing is believing: mental imagery amplifies moral, emotional, and motivational responding to mentally constructed hypothetical events.

Neuropsychologia·2026
Same journal

From past recall to future projection: What does verb tense production reveal about mental time travel in Alzheimer's disease?

Neuropsychologia·2026
See all related articles

This study investigated object-based attention using a cued reaction time task. Findings suggest the exogenous attention system, not endogenous, deforms the attentional spotlight to detect luminance increments.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Attention research often distinguishes between spatial and object-based mechanisms.
  • Understanding how attention shifts, particularly in relation to visual objects, is crucial for explaining perception.

Purpose of the Study:

  • To test for an object-based component in attention shifts during luminance increment detection.
  • To differentiate the roles of exogenous and endogenous attention systems in object-based attentional effects.

Main Methods:

  • A cued reaction time task with a 'Star of David' stimulus (two intersecting triangles).
  • Exogenous cues involved brief brightening of one triangle; a third experiment used a central symbolic cue.
  • Target detection (luminance increment) measured reaction times at varying cue-target delays (100, 200, 500 ms).

Related Experiment Videos

Main Results:

  • Reaction times were slower for targets outside the cued triangle at shorter delays (100, 200 ms), suggesting object-based effects.
  • This effect was mediated by the rapid, reflexive exogenous attention system.
  • A central symbolic cue (endogenous attention) did not produce similar object-based effects.

Conclusions:

  • The exogenous attention system can exhibit object-based properties, deforming the 'attentional spotlight' around cued objects.
  • Stimulus detection tasks alone may not definitively distinguish between spatial and object-based attention.
  • Attention's interaction with object structure is complex and system-dependent.