PSYB01H3 Lecture Notes - Lecture 3: Discriminant, Content Validity, Construct Validity
Document Summary
Differences in the way people (or another organism) behave in response to the same stimulus. Types (of variability) : systematic (explained) random (unexplained) In psychology random in this case means there is not yet a way to explain the thing: ex: a mouse runs through the classroom. Possible variables: gender, country/city living, like/dislike of animals, colour of mouse, etc. Variables must have 2+ values or levels: value: (often a number) number representing one of many possible states of the variable, example: some possible values of height are 6 , or 4 2 . Score: a specific value for a given person: example: my score on the variable of height is 5 7 . Independent variable: manipulated by researcher assumed to be cause. Dependent variable: outcome of experiment assumed to be caused by i. v: dv is sometimes called the outcome variable, the dv is only ever measured, not manipulated, dv depends on the iv.
