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Unformatted text preview: Investigate Control Confounds vs. Noise o Confound varies systematically with IV o Noise can water-down results but does not mislead you o Noise does not have to happen to everyone, whereas confounds have to happen to everyone in the experiment People are Different (another potential threat to validity Experimental Control Selection Bias o Technology Survey Non-response Bias o Should participation in class discussions be graded? People who do not participate wont voice their opinions People Change History Maturation many disorders appear differently depending on age Regression Towards the Mean extreme scores on either end go towards the mean over time...
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This note was uploaded on 08/30/2010 for the course PSYC 380 taught by Professor Staff during the Spring '08 term at University of Delaware.
- Spring '08