A researcher wishes to assess the effects of a new teaching technique on student performance in two sections of a high school mathematics course. She plans to control relevant variables by matching the subjects in the two sections. The relevant variables that she considers to be important are age, sex, amount of high school education, level of aspiration, and intelligence. She will arrange to have one section taught by the new technique and the other by a conventional technique. If she attempts to match on all of the variables listed, what problem is she likely to encounter?
A) An excessive range of mental ability
B) Excessive overlap among the dependent variables selected
C) A lack of statistical techniques for analyzing results of this kind
D) An insufficient number of cases for some of the classifications

Question

Quizplus · Accepted Answer

Matching subjects on a large number of variables can lead to difficulties in finding enough participants who are similar across all those dimensions, resulting in an insufficient number of cases for some of the classifications.

A Researcher Wishes to Assess the Effects of a New