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SW licensure II

independent variable a variable that is believed to affect or alter the status of another variable (the DV)
dependent variable variable who's status depends on the status of another variable (DV is out the outcome of the treatment)
stratified random samplin used to ensure that each "strata" or population characteristic is represented in the samle (gender, age, education, socioeconomic status, ethnic, etc.)
cluster sampling selecting units (clusters) and randomly selecting individuals from those units. Used when not possible to identify or obtain access to the entire pop. of interest
quasi-experimental research investigates the effets of an IV on a DV but does not provide the same degree of control as true experimental research. The assignment of subjects to treatment groups cannot be controlled due to pre-existing groups, organismic IV, or only 1 group
ex-pos facto research after the fact study to assess effects of IV afte rit has occurred. cannot randomly assign subjects to treatment groups
extraneous variable variable that is irrelevant to the purpose of a research study but confounds the study's results because it has an effect on the DV
ANCOVA analysis of covariance - used to remove variability on DV due to extraneous variable
factorial design a study which includes two or more IV
mixed design measures the DV over time or across trials.
nominal scale measurement divides variables into unordered categories. political affiliation, eye color, dsm diagnosis, etc.
ordinal scale numbered categories, ranks. cannot tell difference between scores like interval
interval scale has property of order and equal intervals between successive points
ratio scale properties of order, and equal intervals, and property of absolute zero point
null hypothesis no relationship between IV and DV
chi-square test study involves nominal data (or data reported in terms of frequency) Ex compare the number of people who prefer one of four political candidates
Mann-Whitney U test study includes 2 independent groups and data on DV is reported in terms of ranks. test determines if ranks of observation in one group are equivalent to the other group
T test used for a single sample when a study only includes one group and the mean will be compared to a population mean
ANOVA analysis of variance - compare two or more means
Created by: 8101608



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