Conducting Experiments. SELECTING RESEARCH PARTICIPANTS Methods for selecting participants affects generalization of resutls Samples May Be Drawn From.

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Presentation transcript:

Conducting Experiments

SELECTING RESEARCH PARTICIPANTS Methods for selecting participants affects generalization of resutls Samples May Be Drawn From the Population Using: Probability sampling Nonprobability sampling Determine the Sample Size Larger samples provide more accurate estimates of population values

MANIPULATING THE INDEPENDENT VARIABLE Setting the Stage Types of Manipulations Straightforward manipulations Staged manipulations Confederate Interpretation and replication

MANIPULATING THE INDEPENDENT VARIABLE Strength of Manipulation Strong manipulations increase the chances that the IV will significantly effect the DV Not like real-world experiences Ethics Cost of the Manipulation

MANIPULATING THE INDEPENDENT VARIABLE

MEASURING THE DEPENDENT VARIBLE Types of Measures Self-report measures Behavioral measures Physiological measures Galvanic skin response (GSR) Electromyogram (EMG) Electroencephalogram (EEG) Functional MRI (fMRI)

MEASURING THE DEPENDENT VARIBLE Sensitivity of the Dependent Variable Ceiling effect Floor effect Multiple Measures Cost Measures

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