Textbook Notes (367,844)
Canada (161,454)
Psychology (9,694)
PSYB01H3 (581)
Anna Nagy (283)
Chapter 4

Chapter 4 Textbook Notes

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Anna Nagy

Chapter 4 Variables o A variable is any event, situation, behaviour, or individual characteristic that varies o E.g. cognitive task performance, word length, spatial density, intelligence, gender, reaction time, rate of forgetting, aggression, speaker credibility, attitude change, anger, stress, age, self-esteem Each of these variables represents a general class win which specific instances will vary These specific instances are called the levels or vales of the variable o Must have 2 or more levels or values o Some variables will have numeric values hence they will be quantitative (ie. Age, your IQ). They differ in amount or quantity. Algebra can be applied to such variables (ie. Measure the mean) o Some variables are not numeric and instead identify categories hence they are categorical (ie. Gender, occupation). These variables differ, but not by quantity, and algebra cannot be applied to them o Classified into 4 general categories Situational variables Describe characteristics of a situation or environment The length of words that you read in a book, the spatial density of a classroom, the credibility of a person who is trying to persuade you, the number of bystanders to an emergency Response variables The responses or behaviours of individuals Reaction time, performance on a cognitive task, helping a victim in an emergency Participant or subject variables Individual differences, characteristics of individuals Including gender, intelligence, personality traits such as extraversion Mediating variables Psychological processes that mediate the effects of a situational variable on a particular response Operational Definitions of Variables o A definition of the variable in terms of the operations or techniques the researcher uses to measure or manipulate it o Cognitive task performance may be operationally defined as the number of errors detected on a proofreading task during a 10 minute period o There also may be several levels of abstraction when studying a variable www.notesolution.com
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