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Direct linkGreenberg, Ariela Caren – ProQuest LLC, 2010
"Differential item functioning" (DIF) and "differential distractor functioning" (DDF) are methods used to screen for item bias (Camilli & Shepard, 1994; Penfield, 2008). Using an applied empirical example, this mixed-methods study examined the congruency and relationship of DIF and DDF methods in screening multiple-choice items. Data for Study I…
Descriptors: Test Bias, Science Programs, Income, Program Effectiveness
Longo, Christopher M. – ProQuest LLC, 2012
This study investigated the impact of an inquiry-based science program on the critical thinking skills, science process skills, creativity, and science fair achievement of middle school students. Although research indicates the connection between inquiry and achievement, there is limited empirical research relating specific inquiry-based programs…
Descriptors: Middle School Students, Secondary School Science, Grade 7, Grade 8
