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Abnormal Psych Chapter 2
Terms in this set (24)
Clinical researches do not ___
Asses, diagnose, or treat individuals
Positives of Case study
Used by psychoanalytical's (Freud)
Detailed; helps with individual treatment; ethical way; starting point
Negatives of case study
Can't be generalized to population as a whole; not that scientific
Correctional method and experimental method
Allows researchers to draw broad conclusions
Preferred method of clinical investigation; observing many individuals; use statistical tests to analyze results
Degree in which events or characteristics vary with each other; everyone has equal part in study
Called a sample- must be representative of larger population
Describing a correlation
Can be graphed and a line of best fit can be drawn
Positive= upward slope
Negative = downward slope
Unrelated no slope
Describing correlation (cont.)
Magnitude is important. High magnitude means variable vary very closely together; low means they are farther from line- scattered.
Trust a correlation when
Due to it's statistical analysis of probability; statistical significance ( unlikely to have occurred by chance)
Confidence of correlation increases with the size of the sample and magnitude of the correlation .
Advantages of correlation
Can see trends and relationships; can generalize to large population
Negatives of correlation
Can not establish causation
Reveal the incidence and prevalence of a disorder in a particular population
Number of cases that emerge
Total number of cases
Researchers observe the same individuals on many occasions over a long period
Has a manipulated variable(dependent; cause) and a manipulation'd effect on another variable (dependent variable; measure effect). Other extraneous variables are controlled.
Answers questions about casual relationships.
Group of subject who are not exposed to the independent variable but whose experience is SIMILAR to that of the experimental group.
By comparing the two groups we see the effect of the independent variable.
Any selection procedure that ensures every participant in the experiment is as likely to be placed in one group as another
To avoid bias by participant, they have the participants not know which group they are assigned to (placebo-fake pill)
Neither the participants or researchers know which group they're in
Do not randomly assign participants to groups but make use of groups that already exist (ex: children with history of child abuse)
Nature manipulates the independent variable and the experimenter observes (ex: psychological impact in flooding). Cannot be replicated at will; broad generalizations cant be made
Allow investigators to manipulate independent variables while avoiding ethical and practical limitations; induce lavatory subjects robe have in ways that seem to resemble real life (use animals)
Single participant is observed both before and after manipulation of an independent variable. Rely on baseline data to set a standard comparison ex: ABAB (baseline, alter, baseline, alter)
Combination of many studies (larger data set is analyzed, high sample size, uncover relationships that weren't apparent in other studies)
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