The Association Between Testing Strategies and Performance in College Algebra, Attitude Towards Mathematics, and Attrition Rate Page: 55
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55
Threat to external validity (5, p. 40) is strongest
in possible interaction of testing and treatment. it was
assumed that the experimenter administered the pretests so
that pretest sensitization was minimized. To a lesser
extent, interaction of selection and treatment as well as
reactive arrangements may have affected external validity.
Selection could not be controlled so the results of this
quasi-experimental study were generalized only to
populations similar to the one in this study. It was
assumed that reactive arrangements were minimal since the
intact class provided a natural setting in which the
subjects were not aware that they were being experimentally
treated.
Summary
Procedures for the collection of data were presented
in Chapter III. Pre-treatment algebra achievement scores,
arithmetic scores, and attitude scores were collected from
four classes of college algebra students at Louisiana State
University in Shreveport. The four treatments administered
were homework for one class, weekly quizzing for the second
class, four major examinations for the third class, and
none of these procedures for the fourth class. All four
classes had a teacher-constructed midsemester examination.
Scores on a standardized final examination served as
the dependent variable.
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Johnson, Charles W. (Charles Windle). The Association Between Testing Strategies and Performance in College Algebra, Attitude Towards Mathematics, and Attrition Rate, dissertation, May 1987; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc330880/m1/63/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .