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Glossary of Psych vocab ch 2

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a prediction or assumption about behavior that is tested through scientific research
Hypothesis
to repeat a research study, usually with different participants and in different situations, to confirm the results of the original study
Replicated
a research technique for acquiring data about the attitudes or behaviors of a group of people, usually by asking questions of a representative, random sample
Survey
the total group to be studied or described and from whom samples may be drawn
Target Population
a representative of a target population
Sample
a survey, selected by chance, which fairly represents the general population
Random Sample
a sample drawn in such a way that knwn subgroups within a population are represented in proportion to their numbers in the general population
Stratified Sample
the concept that people who volunteer to participate in research studies often differ from those who do not volunteer
Volunteer Bias
– an in-depth study of a single person or group to reveal some universal principle
Case Study
a type of research in which the same people are studied over a long time period
Longitudinal Method
a method of research that looks at different age groups at the same time in order to understand changes that occur ding the life span
Cross-sectional method
the study of behavior in naturally occurring situations without manipulation or control on the part of the observer
Naturalistic Observation
· the study of behavior in a controlled situation
Correlation – the relationship between variables
Laboratory Observation

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