CAS PS 261 Lecture Notes - Lecture 1: Dispositional Attribution, Construals, Affective Forecasting
28 Sep 2018
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Correlational /survey research (ex. questionnaires or interviews) Correlational research cannot establish a causal relationship. Directionality problem - measuring a bunch of variables at one time so you can"t say for sure that the cause is because of just one. Third variable problem - even if you can figure out the variable, there"s the possibility that the other variables are accounting for the association. How is the sample selected, its size, random or not, etc. If you can get a big enough sample size, almost any two variables can have a correlation. Spurious correlations: two almost completely unrelated things that are found to have a correlation . Experimental research: researcher manipulates (changes the value of) one variable, and measures related changes in a second variable. Control group treated identically but does not receive the. Random assignment used to ensure the equivalence of groups before the experiment. Careful of extraneous influences and possible confounders. Everything needs to be exactly the same.
