This work has a three-fold purpose. The first is to set out the rationale for an alternative approach for assessing the generalizability of research findings. (It is related to but not equivalent to the CE method.) The second is to formalize this approach through a quantitative model. The third is to apply the approach to the results of the…

Randomized trials of educational interventions often face logistical hurdles (Cook, 2002). For example, sometimes they are prevented from reaching their full-term. This would happen if, as a condition of participation, subjects insist on receiving the treatment program within a certain timeframe. This timeframe may be shorter than the full-term…

The purpose of the current work is to apply several main principles of the causal explanatory approach for establishing external validity to the experimental arena. By spanning the paradigm of the experimental approach and the school of program evaluation founded by Lee Cronbach and colleagues, the authors address the question of how research…

In October 2010, WestEd's Strategic Literacy Initiative (SLI) won an i3 "Validation" grant to scale up and validate the Reading Apprenticeship (RA) model in three core secondary content area classes: U.S. history, biology, and English language arts. SLI's proposal stated two goals. Goal 1: To transform academic literacy teaching and…

PCI Education conducted a three-year longitudinal study to determine the comparative effectiveness of the "PCI Reading Program" ("PCI") for students with severe disabilities as implemented in Florida's Brevard Public Schools and Miami-Dade County Public Schools. The primary question addressed by the study is whether students…

This research project consists of a randomized experiment in a few of the Reynoldsburg City Schools. The primary purpose of this research is to produce scientifically based evidence of the comparative effectiveness of the "Scott Foresman Science" ("SFScience)" program. The question being addressed by the research is whether…

This research project consists of a randomized experiment in St. Petersburg Catholic Schools. The question being addressed by the research is whether "Scott Foresman Science" is as effective as the current curricula being used in the participating campuses of the Roman Catholic Diocese of St. Petersburg. The research focuses on 3rd, 4th,…

This research project consists of a randomized experiment in Visalia Unified School District. The question being addressed by the research is whether "Scott Foresman Science" is as effective as or more effective than the curriculum being used at each site. Since Scott Foresman Science provides a significant reading component, the authors…

This research project consists of a randomized experiment in Ogden City School District. The primary purpose of this research is to produce scientifically based evidence of the comparative effectiveness of the "Scott Foresman" program. The question being addressed by the research is whether the "Scott Foresman" program is more…

Pearson Education contracted with Empirical Education Inc. to conduct five randomized experiments to determine the effectiveness of its "Scott Foresman Science" ("SFScience") curriculum and associated materials. This report addresses the experiment in Federal Way Public Schools in Washington State. The primary purpose of this…

In this paper, the authors' investigated whether "Scott Foresman Science" program, a year-long curriculum intended for daily use that provides a sequence of structured and supportive inquiry activities and text materials to develop students' independent investigative skills, is more effective than current science programs in five diverse…

Texas Instruments has undertaken a research program with the goal of producing scientifically-based evidence of the effectiveness of graphing calculators and the "TI-Navigator"[TM] classroom networking system in the context of a professional development and curriculum framework. The program includes a two-year longitudinal study. The…

The authors sought evidence of the effectiveness of the TI-Navigator classroom networking system for the second year of a two-year research study of Texas Instruments classroom technology. This randomized control trial compared Algebra I and Geometry instruction using the TI-Navigator system, which includes the TI-84 Silver Edition graphing…