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Download full textSomers, Marie-Andrée; Zhu, Pei; Jacob, Robin; Bloom, Howard – MDRC, 2013
In this paper, we examine the validity and precision of two nonexperimental study designs (NXDs) that can be used in educational evaluation: the comparative interrupted time series (CITS) design and the difference-in-difference (DD) design. In a CITS design, program impacts are evaluated by looking at whether the treatment group deviates from its…
Descriptors: Research Design, Educational Assessment, Time, Intervals
Peer reviewedHoyle, Craig D.; O'Dwyer, Laura M.; Chang, Quincy – Regional Educational Laboratory Northeast & Islands, 2011
The Maine Department of Education wanted to use longitudinal data from its data system to better understand whether and how student and school characteristics are associated with student performance on the state-mandated Maine High School Assessment (MHSA). It was particularly interested in understanding the factors associated with changes in test…
Descriptors: High Schools, Intervals, Critical Reading, Educational Improvement
Direct linkCabalo, Jessica Villaruz; Vu, Minh-Thien – Empirical Education Inc., 2007
The Maui Hawaii Educational consortium (the Maui School District and Maui Community College) sought scientifically based evidence for the effectiveness of the "Cognitive Tutor (CT) Algebra I Curriculum" to inform adoption decisions. Decision makers were particularly interested in whether the use of the "CT" program affects…
Descriptors: Access to Computers, Program Effectiveness, Algebra, Community Colleges
