PSYCH-101 Lecture Notes - Lecture 18: Bar Chart, Random Assignment, Demand Characteristics
18 Sep 2020
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Random sampling: every person in the population has an equal chance of being selected. Convenience sample: this sample consists of people who are conveniently available for the study. Precise control over variable can eliminate alternative explanations. May be impractical or unethical to address certain types of research questions using an experimental design. Highly controlled lab settings can make generalization of findings to the real world more difficult. Correlation: measures the strength of the relationship between two things (-1 to 1) When receiving special treatment or something new affects human behavior. Even the suggestion" of drinking can affect memory/behavior. The experimenter"s expectations influence the outcome of a study. We might see" what we want to see". People can act differently when they know they are being studied. Similar to experimental research but there is no random assignment to conditions. Relies on existing group membership (gender, married vs, single, age groups) May be more difficult to infer causality.
