PSYC 2001 Lecture Notes - Lecture 6: The Smell, Bacon, Scatter Plot
10 Dec 2017
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Chapter 3: variables, operational definitions (last week, claims, frequency, association, causal, validities. Claim: argument someone is trying to make: psychological scientists use data to test and refine theories and claims, three claims, frequency, association, causal. Facebook users get worse grades in university. Negative scatter plot (facebook up, grades down) Predicting to other people not in the sample. The stronger the association between two variables, the more accurate the prediction. One variable is responsible for changing the other. Two variables: one measured (interval or ratio) and one manipulated (normally nominal/categorical) There must be an association between them (positive or negative) The manipulated variable is causing the measured variable (a. k. a. the effect) Association verbs: linked to, associated with, correlated with, prefers, may predict, tied to, goes with. Causal verbs: causes, affects, promotes, reduces, increases, decreases, makes, changes, leads to, adds, etc. Using tentative language does not alter the form of the claim! Eating too many carrots may turn your skin orange.
