F09SESS10 6s - IE/PSY 577 Session 10 The Subtractive Logic...

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1 IE/PSY 577 Session 10 Chronometric and Physiological Methods 2 IE/PSY 577 Session 10 Chronometric Methods From “chronos”, meaning time Reaction time most common measure Two commonly used analytic tools Subtractive logic Additive Factors logic 3 IE/PSY 577 Session 10 Subtractive Logic: Use: To estimate time for a process Assumption Serial processing stages Pure insertion: inserting a stage does not affect others Logic Difference in RT between a complex task and a simpler task is the time for the extra process 4 IE/PSY 577 Session 10 The Subtractive Logic (1) Simple Reaction Time Go-No Go Reaction time Detect Stimulus Identify Stimulus Execute Response Detect Stimulus Execute Response t(1) + t(2) t(1) + t(3) + t(2) Time to identify stimulus = t(3) = Go-No Go RT - Simple RT 5 IE/PSY 577 Session 10 The Subtractive Logic (2) Go-No Go Reaction Time Choice Reaction Time Detect Stimulus Identify Stimulus Execute Response Select Response t(1) + t(3) + t(4) + t(2) Time to Select Response = t(4)
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F09SESS10 6s - IE/PSY 577 Session 10 The Subtractive Logic...

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