PSYCH 312 1st Edition Lecture 4 Outline of Last Lecture I. Steps in experimental design II. Scientific reasoning a. Inductive b. DeductiveIII. Validity Outline of Current Lecture I. Designing an experiment II. Variablesa. IVb. DVIII. PredictionsIV. Treatment effectCurrent Lecture-Designing an experiment oPopulation-->sample (random selection)-->control group OR experimental/treatment group-Evaluating the hypothesis: variables oIV-What the researcher manipulates -Two types:-Experimenter-manipulated IV-Experimenter-selected IVoDV-Variable the researcher measures to evaluate potential effect of IVoMust make your variables concrete by using operational definitions -An objective definition of a construct/variable stated in terms of how one will measure that construct/variableoTypes of measures for operational definitions -Subjective/self-report These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-Physiological/biological -Objective/behavioraloBe mindful of construct validity -When making hypothesis concrete, need to consider the validity of our construct-Evaluating the hypothesis: predictionsoPredictions-Specify the outcome you expect to see based on your hypothesis -Evaluating the hypothesis: treatment effectoTreatment effect-Observed difference in magnitude or presence of the DV between the control & treatment conditionoStats tests will determine if any difference is statistically significant -If not stat significant-No treatment effect-If results are stat significant-Then there is a treatment
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