PSYC 201W Chapter Notes - Chapter 10: Pilot Experiment, Starch, Sexual Arousal
30 Apr 2017
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Categories of inference: different kinds of inferences: Inferences about constructs: statistical inferences, causal inferences. Types of validity: four types of validity, construct, statistical conclusion. Example: colour and achievement performance: colour-achievement performance experiments, construct validity would involve asking two questions: Is exposing students to a large red, green, or black code number on a booklet a valid manipulation of colour : are scores on anagram and arithmetic tasks a valid measure of. Internal validity concerns the degree to which we can be confident that a study demonstrated that one variable had a causal effect on another variable. Basic threats to internal validity: several types of confounding variables that can threaten a study"s internal validity, quasi-experiment a study that has some features of an experiment, but lacks key aspects of experimental control. Seven sources of threat: history, maturation, testing, regression to the mean, attrition, selection.
