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Lecture 4 - o E.g The Third Variable Problem Smoking and...

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January 30, 12 Technology advances but all is no well in psychology… Humanistic Perspective Rogers & Maslow o Emphasis on individual experience o Free will Flashing forward…to the present Biological perspective Evolutionary perspective Positive perspective Research Design and Methods Descriptive Correlational Research o Naturalistic Observation o Case studies o Surveys Correlational Design Correlation: degree to which two variables are related Correlation Coefficient: Statistic measure o Varies between +1 and -1 o Direction (i.e., the sign, + or -) o Strength (i.e., the number) Positive correlation o Values move in same direction ( ↑↑ , ↓↓ ) Correlation =/= Causation o If 2 variables are correlated, cause of relationship is uncertain
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Unformatted text preview: o E.g., The Third Variable Problem Smoking and depression (and anxiety) • Experimental study o Used to establish cause and effect o How to: Create 2+ conditions: • Experimental Group • Control Group o 3 requirements for valid experiment 1. Manipulate IV (independent variable) and measure DV (dependent variable) 2. Control over experimental situation • extraneous variables- other variables that may influence DV • e.g., characteristics of situation • e.g., characteristics of subjects • Noise VS: confounding variables 3. Random assignment of subjects to groups o •...
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