PSYCH 101 Lecture 4: Experimental Method
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Researchers deliberately manipulate certain factors and measure their effects. Hypothesis: a prediction about a cause and effect relationship between two or more variables. A variable is any condition that can be manipulated, controlled, or measured. Specify how variables are to be observed and measured. A group of participants who are exposed to different levels of the independent variable (treatment) A group of participants who receives the zero value of the independent variable (not given the treatment) Using chance procedures to make sure all participants have an equal chance of being assigned to a group equal chance of being assigned to a group. Can only generalize results to the population being represented in the experiment. Must replicate experiment using different populations to apply findings to different groups. Factors other than the independent variable that are not equivalent across groups that could cause differences in the dependent variable.
