8.27 - Experimentation: Exploring Cause and Effect: Like...

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Experimentation: Exploring Cause and Effect: Like other sciences, experimentation forms the backbone of research in psychology. Experiments isolate causes and their effects Many factors influence our behavior. Experiments (1) manipulate factors that interest us while keeping other factors under (2) control . Effects generated by the manipulated factors isolate the cause and effect relationships. Independent Variable is a factor, manipulated by the experimenter, and whose effect is being studied. Ex: To study the effect of breast feeding on intelligence, Breast feeding is your independent variable. Dependent Variable is a factor that may change in response to independent variable. In psychology it is usually a behavior or a mental process. Ex: In the study of the effect of breast feeding on intelligence , intelligence is the dependent variable. Evaluating Therapies: Double-Blind Procedure: In evaluating drug therapies it is important to keep the patients and experimenter’s assistants blind to which patients got real treatment and which placebo. Random Assignment: Assigning participants to experimental (breast fed) and control (formula fed) conditions by random assigning minimizes pre existing differences between the two groups. Statistical Reasoning:
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8.27 - Experimentation: Exploring Cause and Effect: Like...

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