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Experimental ch 5

variables aspect of testing conditions that can change or take on different characteristics with different conditions
IV random
dv measured
subject quasi, gender
confounded another subject covarrying
extraneous factor we didnt think about
operational definition statements of the precise meaning of procedures or concepts within an experiment; includes iv and dv
converging operations using different operational definitions to arrive at the same meaning of a concept
iv conditions manipulated by the experimenter
confound variable another variable that varies systematically with the iv such that possible effects of this variable cannot be separated from the iv
dv measure of behavior, outcome variable
frequency # of times a behavior occurs
rate # behaviors relative to time
duration time the behavior lasts
latency delay until onset of behavior
topography style/quality of behavior
force intensity of behavior
locus location where behavior occurs
categorical variable varies in kind
quantitative var varies in amount
discrete distinct categories or whole units
continuous allow for meaningful partial/fractional units
apparent limits the individual points on a scale of measurement
real limits the real interval represented by that #
nominal naming categorical variables
ordinal scale ranking categorical variables
interval measuring units
ratio measuring units, including zero
error variance or random error variability in the dv not associated with the iv
systematic error error due to some consistent bias
reliability degree to which a measurement gives the same result on different occasions
test retest reliability test gives the same score on different occasions
internal consistency different items on a test measure the same idea
measurement validity degree to which a measurement tests what its supposed to test
construct validity idea that a test measures the theocratical construct that its supposed to measure and not something else
face validity test seems valid superficially
content validity tests measures the full range of the construct
criterion validity test correlates with other tests of same construct
concurrent validity similar scores on different iq test at same time
predictive validity depends on outcome