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Graphic precision: Controlling stimulus displays on IBM PC-compatible computers

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Abstract

Tachistoscopic presentation of stimuli on IBM PC-compatible computers is limited by a number of factors, including video retrace rates, screen scrolling, and the shape and density of picture elements. A method is presented for overcoming these difficulties through the use of enhanced graphic adapters or video graphic arrays. A C-language program demonstrates (1) synchronous scroll-free displays achieved by writing alternating images to “hidden” pages of video memory, (2) alternative techniques for erasing images, and (3) use of an empirically derived aspect ratio to produce symmetrical figures.

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References

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Author information

Authors and Affiliations

  1. University of Texas, Austin, Texas

    David R. Paredes

  2. Department of Psychology, University of Illinois, Urbana-Champaign, 603 E. Daniel St., 61820, Champaign, IL

    Kevin F. Miller

  3. University of Texas, Austin, Texas

    Carl Creeger

Authors
  1. David R. Paredes
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  2. Kevin F. Miller
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  3. Carl Creeger
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Additional information

The software development reported here was supported by NSF Grant BNS-8510546 and grants of equipment from the IBM Corporation to K. F. Miller through Project Quest.

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Paredes, D.R., Miller, K.F. & Creeger, C. Graphic precision: Controlling stimulus displays on IBM PC-compatible computers. Behavior Research Methods, Instruments, & Computers 22, 319–322 (1990). https://doi.org/10.3758/BF03209823

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  • DOI: https://doi.org/10.3758/BF03209823

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