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Direct linkSørlie, Mari-Anne; Ogden, Terje – International Journal of School & Educational Psychology, 2014
This paper reviews literature on the rationale, challenges, and recommendations for choosing a nonequivalent comparison (NEC) group design when evaluating intervention effects. After reviewing frequently addressed threats to validity, the paper describes recommendations for strengthening the research design and how the recommendations were…
Descriptors: Validity, Research Design, Experiments, Prevention
Download full textTatto, Maria Teresa; Ingvarson, Lawrence; Schwille, John; Peck, Ray; Senk, Sharon L.; Rowley, Glenn – International Association for the Evaluation of Educational Achievement, 2008
Over the last 50 years, the International Association for the Evaluation of Educational Achievement (IEA) has conducted more than 23 large-scale comparative studies of student achievement. The work associated with teacher preparation as well as experience gained in many of IEA's studies, such as TIMSS, led to a request from members of the…
Descriptors: Preservice Teacher Education, Elementary School Teachers, Secondary School Teachers, Mathematics Teachers
