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Reassessment of the Macintosh stereomobilization testing system on normal adult subjects

1 May 1998


The visual function of stereomobilization relates to the effects that temporal information has on the ability to detect stereopsis and perceive depth. In order to validate performance norms of stereomobilization found in prior research, a computer program generated on the ·Macintosh color computer was utilized to determine the effects of varying exposure durations on the ability to perceive stereopsis. Forty-four subjects were tested for stereomobilization. Findings were statistically similar to the studies of Thompson and Yudcovitch (1996) and Chretien and Lindberg (1997) at a gross target disparity value of 450 arc seconds. Although normative values were significantly different between the three studies for the fine disparity target measurements (75 arc seconds), performance patterns for all the studies showed a consistent decrease in stereomobilization performance with a decrease in target exposure duration. At exposure durations of 0.125 seconds and below, for both gross and fine disparities, a threshold level for stereomobilization performance was achieved.


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