Term
| QUASI-EXPERIMENTAL STRATEGY |
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| researcher looks for differences between groups or conditions, but either does not manipulate the independent variable or does not create equivilant groups, such as by randomly assigning subjects to conditions |
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| study assess the degree and direction of statistical association between variables in a single group of subjects |
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| researcher simply observes events or phenomena to detail or categorize them or to chart their course |
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| NONEQUIVILANT CONTROL GROUP DESIGN |
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| uses separate experimental and control groups, without using random assignment or matching to equate them, and only the experimental group receives a particular experience or treatment |
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| INTERRUPTED TIME SERIES DESIGN |
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| researchers take a series of assessments before and after a major event occurs or a teatment condition begins and compare the pretest and posttest data; the time series is interrupted by the event or condition |
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| a characteristic of the subjects, such as gender, that is used in a quasi experiment to separate them into groups for comparisons |
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| a quasi-experimental independent groups design in which groups are formed on the basis of a naturally occurring factor, subject variable |
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| observe different individuals of different ages at about the same time |
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| observe same individuals repeatedly over a long period of time |
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| group of individuals who were born at about the same time and, for tht reason, probable experienced historical events in society that were similar |
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| quasi-experimental method whereby characteristics of subjects are assessed and at a later time examined for relationships to future behaviors or events |
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| quasi-experimental method whereby past behaviors or events are examined for relationships |
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| researchers id median score and assign those above the median to one group and those below to another |
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| researchers use only individuals who score on a test at the upper and lower ends of the distribution |
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| quasi-experimental- no random assignment |
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| in correlational procedures, a graphical representation of subjects' scores on two variable, with the pattern of data points depicting their relationship |
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| a straight line that best represents the data in a scatterplot by following a path that minimizes the summed square deviations of the scores |
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| statistic that can range from -1.00 to +1.00 and expresses the direction and magnitude of association between variables |
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| COEFFICIENT OF DETERMINATION |
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| for two correlated variables, the proportion of the variance of one that can be accounted for by the other; the square of r (the correlation coefficient) |
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| a pattern of data that is not linear in a distribution of scores; the trend of the datat does not follow a straight line |
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| limited dispersion of span of scores fro one or both the variables in a scatterplot |
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| scores that fall well outside the main distribution in a data grouping |
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| a problem in correlational interpretation; any causal relationship underlying a correlation between two variables could operate in either direction |
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