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Violations of four selected principles of writing multiple choice items were introduced into an undergraduate political science examination. Three of the four poor practices had no overall effect on test difficulty. A significant (α= .05) interaction effect between the poor practices and course achievement occurred for one of the four practices, with the poorer students generally gaining most from the poorly written items. KR 20 values were significantly lower for sets of items with the same flaws than for "good" versions of the items in three of four comparisons. The reductions in reliability were equivalent to those expected to result from shortening the test by 13 to 56 percent. Concurrent validity (correlation of experimental test scores with final examination scores) was significantly lower in two of four cases. The reductions in validity were equivalent to those expected to result from shortening the test by 56 to 83 percent. 相似文献
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It has been argued that visitors' pre-visit “agendas” directly influence visits. This study attempted to directly test the effects of different museum visit agendas on visitor learning. Two new tools were developed for this purpose: (1) a tool for measuring visitor agendas; and (2) a tool for measuring visitor learning (Personal Meaning Mapping). Visitor agenda was defined as having two dimensions: motivations and strategies. Personal Meaning Mapping is a constructivist approach that measures change in understanding along four semi-independent dimensions: extent, breadth, depth, and mastery. The study looked at 40 randomly-selected adults who were visiting the National Museum of Natural History's Geology, Gems and Minerals exhibition. Visitor agendas did significantly impact how, what, and how much individuals learned. Results are discussed in terms of the current debate about education vs. entertainment. 相似文献
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