REACTION TIME (RT) AS A DEPENDENT VARIABLE FOR SPATIAL TEMPORAL ORDER JUDGMENT (TOJ)

  • Leah Fostick
  • Harvey Babkoff

Abstract

We have reported previously that the speed of response (1/RT) of spatial temporal order judgments (TOJ) increases in parallel with the increases in accuracy as a function of increasing inter-stimulus interval (ISI). In the current study we expand the study of parallel changes in RT with accuracy to include the effect of stimulus frequency and stimulus onset asynchrony (SOA). The RT-accuracy parallelism is also found when comparing spatial TOJ to spectral TOJ, when measured either by constant stimuli or by an adaptive staircase procedure. The parallelism between RT and accuracy becomes even more interesting when we compared a population of adult dyslexic readers, showing ISI*group interaction (i.e., the difference between groups only becomes apparent as ISI = 30 msec or longer) when measured by accuracy, but shows parallel performance when measured by RT, with dyslexic readers yielding longer RTs across all ISIs.

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