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Glossary of Psych Exam 1 - Module 2

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population
the whole group you want to study and describe
sample
the members within a group that you actually study
random sample
a sample in which every subject had and equal chance of being chosen
theory
an organized set of principles that describes, predicts, and explains some phenomenon
hypothesis
a specific testable prediction often derived from a theory
observational/naturalistic studies
A type of research in which the researcher can not influence or manipulate anything, occurs naturally in real world settings
survey method
a research method that involves interviewing or giving questionnaires to a large number of people
case studies
a type of research that involves making in-depth observations of individual persons
correlation strengh
this is indicated by how close the value is to + or - 1.
correlation direction
positive or negative relationship
independent variable
any variable that the researcher manipulates in an experiment, causes change
dependant variable
a variable that is being measured in an experiment, affected.
control group
not manipulated, serves as comparison for evaluating the effect of the treatment.
experimental group
the group that receives the manipulation in the experiment
experimenter bias
when researchers expectations influence outcome
research participation bias
participants are influence by how they think they should act
double blind study
both the research staff and the participants are ignorant about whether the research participants have received the treatment or a placebo.
placebo effect
any effect on behavior caused by the administration of an inert substance or condition, which is assumed to be an active agent.

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