PSYC 201W Lecture 8: Single-Factor Designs
24 Oct 2017
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Can use the same author, but different articles. Each section has a word limit of 150 words. Experimental control involves manipulation of one or more ivs. Since everything has control, they are able to hold all things but the iv constant. Therefore, any change must be as a result of that one change (the iv) Causality and confounds - three criteria must be met in order to make a causal inference: A factor that covaries with the iv. In this case, we cannot tell whether the iv or the confounding variable affects the dv. Many environmental factors cannot be held constant, but you can balance them across different experimental conditions. Ie measure at different times of day, under different weather conditions, etc. Confounding variables dealing with participant characteristics are further addressed through experimental designs. Quantitative manipulation: vary the amount of the iv that the participant is exposed to. 0 mg, 1 mg, etc. of a drug.
