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PSYC 102: Lecture #3

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University of British Columbia
PSYC 102
David Klonsky

Psychology 102: Developmental, Social, Personality, and Clinical Psychology Lecture #3 - January 10, 2013  Replication: same finding with different participants in different situations  Random sampling: when each member of the target population has an equal chance of inclusion in a sample (unbiased sample) Three Basic Types of Scientific Studies  Descriptive: careful and accurate description (questionnaires and interviews) o Naturalistic observation (observing life as it happens) o Case studies (observe just a subset or a small group)  Correlational: evaluating relationships (links between two things, or among several things) o Amount of sleep and the correlation to depression o Can range from 0.00 to 1.00  No relationship 0.00, perfect relationship (1.00/-1.00)  Sign (+/-) indicates the direction of relationship (positive/negative)  Experimental: exploring cause and effect o We will control one of the variables to see how the other variable reacts  Does the variable effect the outcome (amount of sleep and depression)  Depends on what is the independent and dependent variable  Independent variable: a factor manipulated by the experimenter o The effect of the independent variable is the focus of the study  Dependent variable: a factor that may change in response to an independent variable Evaluating Therapies:  Experimental condition: exposes the participant to the treatment
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