Random Assignment in Experiments
After participants are selected for a study, they are then randomly assigned to different experimental groups. This procedure is essential for creating comparable groups and ensuring that any pre-existing differences among participants are evenly distributed, which strengthens the validity of causal claims.
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Ch.2 Psychological Research - Psychology @ OpenStax
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Introduction to Psychology @ OpenStax Course
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OpenStax Psychology (2nd ed.) Textbook
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Cause-and-Effect Relationship
Example of a Causal Claim in Experimental Research
Random Selection in Experiments
Random Assignment in Experiments
Logic of Causal Inference in Controlled Experiments
A researcher reviews the findings from four different studies. Which of the following conclusions could only have been drawn from a study using an experimental design?
Blinding in Experiments
Conditions for Causal Statements in Experiments