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

Estimating the components of the gap effect.

J Pratt1, H Bekkering, M Leung

  • 1Department of Psychology, University of Toronto, Ontario, Canada. pratt@psych.utoronto.ca

Experimental Brain Research
|February 15, 2000
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

Emphasizing responder speed or accuracy modulates but does not abolish the distractor-induced quitting effect in visual search.

Cognitive research: principles and implications·2023
Same author

Findings from the first public COVID-19 temporary test centre in Hong Kong.

Hong Kong medical journal = Xianggang yi xue za zhi·2021
Same author

Corrigendum to "Nine-month-old infants update their predictive models of a changing environment" [Dev. Cognit. Neurosci. 38, August (2019), 100680].

Developmental cognitive neuroscience·2020
Same author

Infection control challenge in setting up a temporary test centre at Hong Kong International Airport for rapid diagnosis of COVID-19 due to SARS-CoV-2.

The Journal of hospital infection·2020
Same author

New Service Model for Common Mental Disorders in Hong Kong: a Retrospective Outcome Study.

East Asian archives of psychiatry : official journal of the Hong Kong College of Psychiatrists = Dong Ya jing shen ke xue zhi : Xianggang jing shen ke yi xue yuan qi kan·2019
Same author

Disseminated Sporotrichosis in a Bilby (Macrotis lagotis).

Journal of comparative pathology·2019
Same journal

Changes in synergy formation and modulation during cyclic finger force production tasks in female adults with dystonic cerebral palsy.

Experimental brain research·2026
Same journal

Molecular links between reelin downregulation, topoisomerase IIβ alterations, and proteins involved in Alzheimer pathology in human SH-SY5Y neuroblastoma cell line.

Experimental brain research·2026
Same journal

Motor cortex excitability during spine shape-judgment in adolescent idiopathic scoliosis: a TMS motor evoked potential study.

Experimental brain research·2026
Same journal

Trajectory dynamics and endpoint accuracy in targeted ballistic contractions.

Experimental brain research·2026
Same journal

Exploring Sevoflurane promotes hippocampal neuron mitophagy in elderly postoperative cognitive dysfunction by HSP90AA1 based on network pharmacology.

Experimental brain research·2026
Same journal

Loading modulates monosynaptic transmission from spindle primary afferents to motoneurons in humans.

Experimental brain research·2026
See all related articles

The gap effect shortens saccadic reaction time (SacRT) via warning and fixation offset effects. A new partial-gap trial isolates these effects, revealing visual warning reduces SacRT by 5-7%.

Area of Science:

  • Cognitive Neuroscience
  • Oculomotor Research
  • Human Factors

Background:

  • The gap effect demonstrates reduced saccadic reaction time (SacRT) when a fixation point disappears before a peripheral target appears.
  • This phenomenon is attributed to a general warning effect and a specific oculomotor fixation offset effect (FOE).
  • Disentangling these two components has been challenging in previous research.

Purpose of the Study:

  • To introduce and validate a novel "partial-gap trial" paradigm.
  • To quantitatively estimate the independent contributions of visual warning effects and FOE to the overall gap effect.
  • To investigate the interaction between auditory warning signals and FOE on SacRT.

Main Methods:

  • Introduction of the partial-gap trial: the fixation point changes size (reduces or increases) before target presentation.

Related Experiment Videos

  • Comparison of SacRT in partial-gap trials (fixation point reduction) with and without auditory warning signals.
  • Analysis of SacRT in partial-gap trials with fixation point enlargement (overlap trials) versus standard overlap trials.

    • Main Results:

    • A reduction in fixation point size (visual warning) decreased SacRT by 5-7%, irrespective of auditory cues.
    • Auditory warning effects and FOE were found to interact in modulating SacRT.
    • Enlarging the fixation point before target presentation led to slower SacRTs compared to standard overlap trials.

    Conclusions:

    • The partial-gap paradigm effectively isolates visual warning effects and FOE.
    • This method provides a valuable tool for researchers studying oculomotor control and attention.
    • Understanding the distinct contributions of warning signals and fixation offsets advances research on saccadic eye movements.