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a method of investigation involving observation and theory to test scientific hypotheses
an explanation using an integrated set of principles that organizes and predicts observations
involves observing and noting behavior in order to provide a systematic and objective analysis; advantages= real world setting; disadvantages= bias observations, observer presence can change behavior
Observing and recording behavior in naturally occurring situations without trying to manipulate and control the situation.
a research in which the same people are restudied and retested over a long period; advantages= info about the affects of age on the same people;disadvantages= expensive, takes a long time
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