Search results with tag "Comparison group"
Types of Group Comparison Research
www.csus.eduC = Comparison group X = Independent variable O = Dependent variable Group IV DV Case A E X O C X O Case B E X1 O E X2 O 11 Control Procedures In an ex post facto study, it is difficult to make conclusions about a causal relationship between two variables. One cannot be sure that the two groups do
Matched-Comparison Group Design: An Evaluation Brief or ...
www.edc.orgOct 27, 2016 · Comparison Group Design . A matched-comparison group design is considered a “rigorous design” that allows evaluators to estimate the size of impact of a new program, initiative, or intervention. With this design, evaluators can answer questions such as: • What is the impact of a new teacher compensation model on the reading achievement of
Quasi-Experimental Design and Methods - unicef-irc.org
www.unicef-irc.orgQuasi-experimental designs identify a comparison group that is as similar as possible to the treatment group in terms of baseline (pre-intervention) characteristics. There are different techniques for creating a valid comparison group such as regression discontinuity design (RDD) and propensity score matching (PSM).
Implementing Propensity Score Matching Estimators with STATA
fmwww.bc.educomparison group: ywy iijj jC pi = ∈ ∑ 0 where: • C0(pi) is the set of neighbours of treated i in the control group • wij ∈[0, 1] with wij jC p∈ i ∑ = 0 1 is the weight on control j in forming a comparison with treated i Two broad groups of matching estimators individual neighbourhood weights
Peer-Assisted Learning Strategies (PALS)
ies.ed.govstudents and 20 comparison students). Comparison group teachers used their normal approach (business- ... The study design was a randomized controlled trial in which 12 classrooms were stratified on grade level ... reviewed as a quasi-experimental design because teachers knew their treatment condition when they selected .
Brief 5: Evaluating Policy Impact
www.cdc.govor impractical to compare changes over time or to use a comparison group. Two potential non-experimental designs for impact evaluation are cross-sectional and case study.2 Establishing a Link Between a Policy and Changes in Outcomes and Impacts A randomized experimental design is sometimes considered the gold standard for conducting an impact