Reaction Time

4805 WordsNov 12, 200820 Pages
Abstract “Reaction Time” is the interval of time between the application of a stimulus and the detection of a response and has been thought to differ based upon the effects of modality and warning signals. In the “Reaction Time” experiment a total of 24 students from the University of Cincinnati participated in an experiment consisting of two sensory modalities, audition and vision, which were combined with two levels of warning signal status. The two levels of warning signal status were signal onset and signal offset. This provided a total of four experimental conditions and is described as a two by two repeated measures design. The independent variables included both modality and warning signals, while the dependent variable was…show more content…
When the arm physically moves, the response execution is occurring. With this kept in mind, it is important to also take note of the different types of reaction time experiments including: simple reaction time and disjunctive reaction time. During simple reaction time a subject must react to the presence of the response stimulus, such as the process that occurred with the hot water streaming from the faucet. Disjunctive reaction time occurs when a subject will have more than one choice of responses to a stimulus. Therefore, a subject must not only react to the response signal, but they must also identify which response is appropriate. In this situation, reaction time delay may be attributed to the process of identifying which response is appropriate. Disjunctive reaction time is used for the purposes of the “Reaction Time” experiment with the use of modality and warning signals as independent variables. Though the two types of reaction time experiments differ, both simple reaction time and disjunctive reaction time undergo similar processes including: sensory encoding, stimulus identification, response selection and response execution (as described earlier). Each step of the processes is essential as they help explain the lag difference between reaction time and stimulus detection. The difference in reaction time to a stimulus can specifically be attributed to response stimulus modality. Response stimulus modality refers to the type of sensory
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