EDUCATORS HAVE long been in general agreement concerning the desirability of teaching for improvement in the ability to reason critic ally and rigorously. Despite this agreement, however, it is obvious that much more can and should be done in this area of such importance in a democratic society. This study was designed in an effort to contribute further informa tion toward the achievement of the above named objectives. It involved (1) the construction of two forms of a new test, based on the ability to recognize printed statements of fallacies in reasoning, (2) the use of this test in a survey of 297 high-school students in grades ten, eleven, and twelve in an urban comprehensive high school, and (3) a demonstration of the teachability of the general content of the test. The Fallacy Recognition Test was constructed in two parallel forms, A and B, of fifty items each. These fifty items consisted of three simple warm-up items, eighteen distractor items, and twenty-nine scored items. The scored items were examples of fallacies in reason ing as selected from over one hundred books on logic, and edited with respect to reading level and content material to fit the high-school pop ulation surveyed. The two forms of the test were administered to two groups, a sur vey group of 297 high-school students in grades ten, eleven, and twelve, and also an experimental group of thirty-two high-school students, members of a class not involved in the survey. The survey group was tested at weekly intervals for three weeks, the first two weeks with Forms A and B, the third week with the Thur stone Primary Mental Abilities Test, Intermediate Form. The school records of these students were examined for scholastic honor point ra tios. The experimental group was also tested using Forms A and B, but was given one forty-minute class period of general instruction about reasoning problems between the two testing periods, the entire experi ment taking only three days.
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