Abstract
A technique was developed to automate subjective measurement of the resting states of the eyes. This technique, the Modified Binary Search (MOBS), evolved from the binary search and a commonly used manual bracketing technique. The procedure is mathematically and logically simple, and it requires minimal storage and computation capabilities. Monte Carlo simulations indicate that the MOBS procedure provides more precise measures with fewer stimulus presentations than conventional staircases. It is also relatively insensitive to response errors.
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Francis, E. L., &Owens, D A. (1983). The accuracy of binocular vergence for binocular stimuli.Vision Research,23, 13–19.
Hennessy, R. T., &Leibowitz, H. W. (1972). Laser optometer incorporating the Badal principle.Behavior Research Methods & Instrumentation,4, 237–239.
Johnson, C. A. (1976). Effects of luminance and stimulus distance on accommodation and visual resolution.Journal of the Optical Society of America,66, 138–142.
Johnson, C. A. (1985). Properties of staircases in automated perimetry.Investigative Ophthalmology & Visual Science,26 (3), 217.
Johnson, C. A., Post, R. B., &Tsuetaki, T. K. (1984). Short-term variability of the resting focus of accommodation.Ophthalmic & Physiological Optics,4, 319–325.
Lehman, R. S. (1977).Computer simulation and modeling. An introduction, New York: Wiley.
Miller, R. J., Pigion, R. G., Wesner, M. F., &Patterson, J. G. (1983). Accommodation fatigue and dark focus: The effects of accommodation-free visual work as assessed by two psychophysical methods.Perception & Psychophysics,34, 532–540.
Owens, D A. (1984). The resting state of the eyes.American Scientist,72, 378–387.
Wales, R., &Blake, R. R. (1970). Rule for obtaining 75% threshold with the staircase method.Journal of the Optical Society of America,60, 284–285.
Wetherill, G. B., &Levitt, H. (1965). Sequential estimation of points on a psychometric function.The British Journal of Mathematical & Statistical Psychology,18, 1–10.
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This research was supported by Franklin & Marshall College and by Grant EY03898 from the National Eye Institute. The authors gratefully acknowledge Harold Bedell, Ellie Francis, Chris Johnson, and Mark Wagner for their suggestions.
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Tyrrell, R.A., Owens, D.A. A rapid technique to assess the resting states of the eyes and other threshold phenomena: The Modified Binary Search (MOBS). Behavior Research Methods, Instruments, & Computers 20, 137–141 (1988). https://doi.org/10.3758/BF03203817
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DOI: https://doi.org/10.3758/BF03203817