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Unformatted text preview: Jordan Becker Kines 361-301 Lab #1 Choice Reaction Time: Hicks Law Introduction: Hicks Law states that reaction time increases in proportion to the number of response choices (Magill, 2007). The relationship is a logarithmic one, such that as the response choices continue to grow the reaction increases at a smaller rate and should eventually level off at a plateau. Equation for Hicks Law is: Choice RT = k [log 2 (N+1)] Hicks law uses a simple RT of 200msec to define k and N is the number of possible choices. The law is especially pertinent in predicting RT increases due to its use of the log 2 function. The log 2 function allows the law to predict the specific size of increase as well as the simple fact that the RT does increase with the number of choices increase (Magill, 2007). Important in the prediction of reaction time is the physical relationship between the stimulus and response, something known as stimulus-response compatibility. S-R compatibility suggests there is a discrepancy between RT for stimulus-response pairs that correspond with actual, physical characteristics and those that do not correspond with their actual, physical characteristics. Thus it might be obvious to think that S-R pairs that are compatible would have a faster RT than those that are considered incompatible. There are two effects that determine compatibility. A spatial relationship effect describes the orientation of stimuli and the orientation of their corresponding responses. The Stroop effect describes an instance where the appearance of a stimulus suggests one type of response but requires a different response (Magill, 2007). In this experiment we only dealt with a spatial relationship incompatibility.dealt with a spatial relationship incompatibility....
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This note was uploaded on 03/27/2008 for the course KINES 361 taught by Professor Mason during the Spring '08 term at Wisconsin.
- Spring '08