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Check the RELIABILITY of a measure?	Help
Look at the VALIDITY of a measure?	Help
Investigate RELATIONSHIPS between characteristics - e.g. is extraversion linked to creativity?	Help
PREDICT something from other variables - e.g. do age, extraversion and intelligence predict creativity?	Help
Look for CHANGE on one variable measured at 2 or more time points - e.g. from before to after an intervention?	Help
Look at scores on one variable measured under different conditions - .e.g. a test of cognitive performance when participants are drunk versus when they are sober. WITHIN GROUP DIFFERENCES.	Help

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