PSY230H1 Lecture Notes - Lecture 5: Sigmund Freud, Posttraumatic Stress Disorder, Jean Piaget
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PSY230H1 Full Course Notes
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Mean and std same: std is width of mean. Who prone to alcoholism, have powerful effect after drinking fast, 10-15 min ascending. Endorphin go up, opiate effect, naltrexone can block endorphin. So have to study father and son, to see genetic effect not prenatal effect. Cannot use female b/c uncontrollable potential confound effects. Not sure to match: # of drinks, anti-social personality, Diff btw 2 groups (alcoholic and not alcoholic) is not sure so cannot decide what attributes to control. Thus, random assignation to group is important-> remove infinite relevant covariance, idiosyncrasy. Experimental design is more powerful than correlation design. Should not set probability level to p= . 001 instead of p= . 05 -> to balance the risk. Need to know 3 things: effect size=diff btw 2 means/std of pool group, #of people in study, probability by chance. *effect size (need to know # of subject, probability)by looking at distribution: Square of correlation coefficient (amount of variation): go up to 1.
