Evaluation Designs Adrienne DiTommaso, MPA, CNCS Office of
Evaluation Designs Adrienne DiTommaso, MPA, CNCS Office of Research and Evaluation Learning objectives By the end of this presentation, you will be able to: Explain evaluation design Describe the differences between types of evaluation designs Identify the key elements of each type of evaluation design Understand the key considerations in selecting a design for conducting an evaluation of your AmeriCorps program What is evaluation design? Evaluation design is the structure that provides the information needed to answer each of your evaluation questions. Your intended evaluation design should be based on and aligned with the following:
Your programs theory of change and logic model Primary purpose of the evaluation and key research questions Resources available for the evaluation Funders evaluation requirements Evaluation designs and CNCS requirements Meet Requirements Evaluation Study Designs Large Grantees Small Grantees/ EAP Programs Process Design (Non-Experimental Design Studies) No Yes Outcome Design (Non-Experimental Design Studies)
No Yes Yes Yes Outcome (Impact) Design (Quasi-Experimental* or Experimental Design Studies) *Fulfills CNCS evaluation design requirement for large, recompeting grantees if a reasonable comparison group is identified and appropriate matching/propensity scoring is used in the analysis. Basic types of evaluation designs The two sides of a programs logic model align with the two types of evaluation designs: Process and Outcome. Process evaluation Goals: Documents what the program is doing Documents to what extent and how consistently the program has been implemented as intended
Informs changes or improvements in the programs operations Common features: Does not require a comparison group Includes qualitative and quantitative data collection Does not require advanced statistical methods Process evaluation designs Common methods include: Review of program documents and records Review of administrative data Interviews, focus group Direct observation Types of analysis: Thematic identification Confirmation of findings across sources (triangulation) Facilitated example: Process evaluation Evaluation Design Crosswalk: Process Evaluation Research question Evaluation design Methods
What kinds of clients are seeking financial education services? Process evaluation How are clients accessing the program? Client interviews (25) Document review: client intake forms, member activity logs
Data to be collected, when, and by whom Client interviews (same as above) Partner focus groups (4) Evaluator will conduct interviews when clients begin program Documents reviewed quarterly (Same interview as above)
Evaluator will hold focus groups quarterly Analysis plan Thematic analysis on interview transcripts using NVivo Coding and thematic analysis (Same as above) Thematic analysis on transcripts using NVivo Outcome evaluation Goals:
Identifies the results or effects of a program Measures program beneficiaries' changes in knowledge, attitude(s), and/or behavior(s) that result from a program Common Features: Typically requires quantitative data Often requires advanced statistical methods May include a comparison group (impact evaluation) What is a comparison or control group? A group of individuals not participating in the program or receiving the intervention Necessary to determine if the program, rather than some other factor, is causing observed changes Comparison group is associated with a quasiexperimental design and control group is associated with an experimental design Outcome evaluation designs Non-experimental designs Outcomes are only tracked for the intervention group There are several variations within the category of nonexperimental outcome
designs, differing only in number and timing of outcome measurement points: a) Single group post-test b) Single group pre- and post-test Intervention Group Pretest a) Single group post-test b) Single group pre- and posttest 0 Treatment Posttest X 0 X
0 X = intervention is administered 0 = measurement is taken Quasi-experimental designs Defined by collecting data on two or more study groups an intervention group and a comparison group The intervention and comparison groups are identified from pre-existing or self-selected groups and are not formed through a random assignment process Intervention Group Comparison Group
Pre-test Treatment 0 X 0 Posttest 0 0 X = intervention is administered 0 = measurement is taken Pre-existing differences between the intervention and comparison groups at the outset of the intervention may lead to inaccurate estimates of the programs effects Types of quasi-experimental designs
Regression discontinuity Differences-in-differences Comparative interrupted time series Pre/post-test with matched comparison group Group constructed using: Propensity score matching Case matching Instrumental variable Experimental designs Defined by collecting data on two or more study groups an intervention group and a control group Pretest Intervention
Group Randomly assigned 0 Treatment X Posttest 0 Control Group Random assignment 0 0 techniques (e.g., lottery draw) Randomly assigned are used by the evaluator to assign study participants to X = intervention is administered 0 = measurement is taken either the intervention or the
control group Random assignment ensures the study groups are equivalent prior to intervention, thus are often considered the most credible design to show impact Facilitated example: Outcome evaluation Evaluation Design Crosswalk: Outcome Evaluation Research question Evaluation design Do clients exit the Outcome program with evaluation increased knowledge of personal finance concepts relevant to their needs? Methods
Data to be collected, when, and by whom Randomized control trial- clients will be randomly assigned to treatment at time of application to program Control group individuals deferred for 6 months, then eligible to participate in program Analysis plan Client and control
group knowledge of personal finance concepts Pre-test: during application; post-test: for treatment group, upon completion of program. For control group, at 6 months post-deferment Collected by evaluator via paper and pencil and online survey Statistical analysisdescriptive statistics; between groups T-test using STATA software Evaluation designs and CNCS requirements Meet Requirements Evaluation Study Designs
Large Grantees Small Grantees/ EAP Programs Process Design (Non-Experimental Design Studies) No Yes Outcome Design (Non-Experimental Design Studies) No Yes Yes Yes Outcome (Impact) Design
(Quasi-Experimental* or Experimental Design Studies) *Fulfills CNCS evaluation design requirement for large, recompeting grantees if a reasonable comparison group is identified and appropriate matching/propensity scoring is used in the analysis. Questions?
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