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Chapter 2

Chapter 2 study guide notes- Response Performance Measures Stimulus Processing

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University of Toronto St. George
Michael Inzlicht

PAGE 54 Response Performance Measures Stimulus Processing -Wundt established first laboratory in psych in 1874 -also pioneered many methods for studying how the min d works by examining how people respond on psychological tasks -the typical goal of response performance is to quantify how a perceptual or cognitive proces s responds to a specific stimulus -benefit: using response performance as a methodology makes it relatively simple to study cognition and perception -researchers infer how a stimulus is processed from how a person responds to it -quantified in three ways 1. a researcher can measure reaction time (a quantification of performance behaviours that measures the speed of a response) -the more processing a stimulus requires, the longer the reaction time that stimulus will be 2. measure response accuracy (how wel l a stimulus was perceived) -experiment focus on one side of the scre en, while the other scre en changes and se e if the person can tell whether its the same or different -if the accuracy of responses is greater for stimuli presented on the side of at tention, then at tention is improving the perception of the stimulus 3. measure response performance by stimulus judgments, regarding the different performance with which they are presented Body and Brain Activity can be Directly Measured -activity of body and brain can be measured in different ways -certain emotional states influence the body in predictable ways -being frightened causes muscles to become tense and hearts beat faster -other bodily systems are influenced by mood and mental states -blood pressure, blood temperatures, rate of perspiration, pupil size, breathing rates -all are examples of psychophysiological assessment (researchers examine how changes in bodily functions are associated with behaviour or mental state) -use of polygraphs allows one to assess these bodily states, under the assumption that people who are lying experience arousal and are more likely to show physical signs of stress -correspondence betwe en bodily response and mental state is not perfect -stressful events can lead to increased heart rate or reduced heart rate Electrophysiology -a method of data collection that measures electrical activity in the brain to see how it is related to cognitive and perceptual tasks -electroencephalogram (EEG) is the device that measures brain activity by recording overal l brain activity -useful because different behavioural states produce predictable EEG patterns -shows specific and consistent patterns as people fall asleep and reveals that the brain is very active even www.notesolution.com
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