Experimental Psychology: Test 2 Review Research Design and Experimental Issues:-Theory vs. Hypothesis: A theory is a claim that has not been proven or tested scientifically. A hypothesis is a claim that is under scientific inspection.-Correlational vs. Experimental Studies: Correlational studies gather information as it is without the influence of an experimenter. Experimental studies gather information as it is with the influence of an experimenter.-Research Question: The goal of all research is to find a relationship between two or more variables.-Independent vs. Dependent Variables: The independent variable is the key item under study that the experimenter changes or manipulates in an experimental study. The dependent variable is the outcome of the independent variable and is therefore dependent upon the independent variable.-Random Sampling and Random Assignment: random assignment of subjects or participants to groups. This is done to control 3 rd variables (anything other than the IV
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