PSY 240 Lecture Notes - Lecture 2: Random Assignment, Dependent And Independent Variables, Internal Validity
12 Feb 2018
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Correlational method - assesses the relationship between two or more variables. Correlation coefficient - statistical measure of the relationship between two variables r = +0. 37 (number indicates strength of relationship 0. 00 to 1. 00 - closer to 1 means stronger correlation); +/1 indicates direction of relationship (positive or negative) Experiments manipulate factors that interest us, while other factors are kept under control. Isolate the cause and effect relationships by manipulating our variable(s) of interest. Independent variable (iv) - a variable the researcher directly manipulates to determine its influence on behavior. Dependent variable (dv) - a respond or behavior that the researcher measures. At the end of their participation, participants are informed of: All procedures, including an explanation of exactly what happened and why. E. g. , confederates: people who act like they are participants but are really working for the experimenter. It"s not a natural situation, people may not act naturally! Correlation - examines how variables are related to one another.
