Lecture 5.Experimental Method 1

No exercise creating two or more conditions or groups

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Unformatted text preview: neous variable confound IV DV none of the above   Manipulation – the researcher manipulates an independent variable (exercise vs. no exercise) creating two or more “conditions” or “groups”   Control ◦  Experimental Control – all variables except the level of the independent variable are held constant across the conditions ◦  Random Assignment – participants are randomly assigned to the conditions (controls for potential differences in participant variables across groups)   Comparison – the researcher compares the dependent variable across the conditions   Covariation of the Cause and Effect – when the cause is present, the effect must occur and when the cause is not present the effect must not occur   Temporal Precedence – the cause must precede the effect   Elimination of Alternative Explanations – potential confounds must be controlled 4 5/20/13   We cannot determine causation using the correlational method because the following conditions for determining causation are absent a)  b)  c)  d)  e)  Covariation of cause and effect Temporal precedence Elimination of alternative explanations B and C All of the above   Internal Validity - refers to the ability to draw accurate conclusions about causal relationships from the data   External Validity - refers to the ability to generalize the results of a study to other populations, settings and procedures ◦  Population Validity – the exte...
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This note was uploaded on 01/23/2014 for the course PSYC 217 taught by Professor Victoria during the Winter '11 term at UBC.

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