AQA A A2 Research Methods Vocab.

1. Characteristics of individual participants that may influence the outcome of a study. (11, 9)
4. A sampling technique in which groups of participants are selected in proportion to their frequency in the population to obtain a representative sample. (10, 6)
6. A measure of dispersion that shows the amount of variation in a set of scores. (8, 9)
7. The extent to which a procedure is measuring what its intending to measure. (8, 8)
8. In repeated measures design, a confounding variable arising from the order in which conditions are presented. (5, 7)
9. To ensure that variables are in a form that can be easily tested. (14)
10. A measure of similarity between two individuals or sets of individuals on a given trait. (11, 4)

1. A trial run of a research study involving only a few participants to represent the target population. Its conducted to test the research design, with the mind to improve it before a full scale study. (5, 5)
2. An assumption that there is no relationship in the population from which the sample was taken with respect to the variables being studied. (4, 10)
5. In an inferential test the value of the test statistic that must be reached to show significance (8, 5)

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