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    Development and Application of a Three-Tier Diagnostic Test to Assess Pre-service Science Teachers' Understanding on Work-Power and Energy Concepts
    (Springer, 2023) Irmak, Meltem; Inaltun, Huseyin; Ercan-Dursun, Jale; Yanis-Kellec, Hilal; Yuruk, Nejla
    The purpose of this study is twofold: (1) to develop and validate a three-tier diagnostic test on work, power, and energy (WPE) concepts and (2) to identify Turkish pre-service science teachers' conceptual understanding through this test. The Work, Power, and Energy Concept Test (WPECT) was developed through interviews, read-aloud sessions, and two pilot tests. Construct, content, and face validity of WPECT was achieved by various statistical procedures and expert opinions. The final version was administered to 709 pre-service science teachers (79.43% female, 20.57% male) from nine different universities which are located in seven official geographical regions of Turkey. The Cronbach alpha reliability coefficient of the test was estimated as .73. The analysis of the responses revealed that the majority of the participants showed an inadequate scientific understanding of WPE concepts. Four common alternative conceptions were held by more than 10% of the participants. These are as follows: (1) Constant pulleys produce a gain in energy and a corresponding gain in work; (2) The total amount of potential energy always transforms into the kinetic energy including frictional environments; (3) An object's total energy does not change when it is moved by a force; (4) A less muscular person moving the same object to the same distance at the same time delivers more power because s/he uses more energy. The results also presented that WPECT is a valid and reliable instrument to assess pre-service science teachers' alternative conceptions on WPE.
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    Investigating differences in preservice science teachers' resource management strategies in preparing laboratory report
    (Elsevier Science Bv, 2014) Inaltun, Huseyin; Irmak, Meltem; Yanis, Hilal; Ercan, Jale
    This study examined differences in students reported resource management strategies used in laboratory report preparation with respect to grade level and quality of laboratory reports. The differences in these groups were examined in terms of resource management strategies (tone and study environment, effort regulation, peer learning, and help seeking). The study includes SI freshmen, 86 sophomore and 82 juniors who are enrolled in laboratory courses in elementary science education program of the same university. Motivated Strategies Learning Questionnaire Turkish Version (MSLQ-TV) was used for data collection. Moreover, a rubric developed by researchers was used for analyzing quality of laboratory reports (high-, medium-, and low-quality).The differences in Turkish pre-service science teachers' resource management strategies used in laboratory report preparation were discussed with instructional implications for teacher education programs. (C) 2013 The Authors. Published by Elsevier Ltd.