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Audiovisual presentation of video-recorded stimuli at a high frame rate
Linköping University, Department of Behavioural Sciences and Learning, Psychology. Linköping University, Faculty of Arts and Sciences.
2014 (English)In: Behavior Research Methods, ISSN 1554-351X, Vol. 46, no 2, 499-516 p.Article in journal (Refereed) Published
Abstract [en]

A method for creating and presenting video-recorded synchronized audiovisual stimuli at a high frame rate-which would be highly useful for psychophysical studies on, for example, just-noticeable differences and gating-is presented. Methods for accomplishing this include recording audio and video separately using an exact synchronization signal, editing the recordings and finding exact synchronization points, and presenting the synchronized audiovisual stimuli with a desired frame rate on a cathode ray tube display using MATLAB and Psychophysics Toolbox 3. The methods from an empirical gating study (Moradi, Lidestam, and Ronnberg, Frontiers in Psychology 4: 359, 2013) are presented as an example of the implementation of playback at 120 fps.

Place, publisher, year, edition, pages
Springer Verlag (Germany) , 2014. Vol. 46, no 2, 499-516 p.
Keyword [en]
Psychophysics; Frame rate; Audiovisual; Synchronization; Temporal resolution
National Category
Basic Medicine
URN: urn:nbn:se:liu:diva-110292DOI: 10.3758/s13428-013-0394-2ISI: 000340226200017PubMedID: 24197711OAI: diva2:744013
Available from: 2014-09-05 Created: 2014-09-05 Last updated: 2014-09-09

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