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

Searching for impossible objects: processing form and attributes in early vision.

N Donnelly1, A Found, H J Müller

  • 1Department of Psychology, University of Kent, Canterbury, U.K. n.donnelly@ukc.ac.uk

Perception & Psychophysics
|June 17, 1999
PubMed
Summary

Early vision processes basic shape and 3-D orientation from line elements, but complex form properties like impossibility require more extensive processing. Localized line analysis supports 3-D orientation perception.

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

<sup>11</sup>C-methionine PET aids localization of microprolactinomas in patients with intolerance or resistance to dopamine agonist therapy.

Pituitary·2022
Same author

Comments on 'Screening for vestibular schwannoma in the context of an ageing population'.

The Journal of laryngology and otology·2020
Same author

Erroneous Assumptions Regarding Genes.

International journal of epidemiology·2017
Same author

Relationship between Traditional Chinese Beliefs about Aetiology of Mental Disorders and Help Seeking: A Survey of the Elderly in Macao.

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·2016
Same author

Dynamic magnetic resonance imaging and spectroscopie of experimental brain injury.

Acta neuropsychiatrica·2016
Same author

Development and integration of a Surveillance Monitoring solution to provide earlier detection of the deteriorating patient.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2016

Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Computational Neuroscience

Background:

  • Early visual processing handles fundamental attributes like shape and orientation.
  • The distinction between local and global form processing remains an area of investigation.

Purpose of the Study:

  • To determine how early vision processes form and metric attributes derived from line elements.
  • To differentiate the preattentive processing of 3-D orientation versus abstract form properties.

Main Methods:

  • Conducted five experiments involving visual search tasks.
  • Manipulated target properties related to abstract form (impossibility) and metric attributes (3-D orientation).
  • Analyzed search speed and efficiency to infer processing mechanisms.

Related Experiment Videos

Main Results:

  • Search for targets defined by abstract form (impossibility) was slow and serial.
  • Search for targets defined by 3-D orientation was significantly faster and easier.
  • 3-D orientation can be derived from localized line relations, unlike abstract form properties.

Conclusions:

  • Early vision can process 'gross' aspects of form but not complex, global properties requiring complete line relation analysis.
  • Localized processing of line relations is sufficient for deriving 3-D orientation in early vision.
  • The preattentive system distinguishes between locally derivable attributes and globally defined form properties.