Module 6: Descriptive, Normative, and Impact Evaluation Designs

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Common Threats toInternal Validity• History (events occurring at the same time)• Maturation of subjects (getting older changesthe results)• Testing (learning how to take the test)• Instrumentation (changes in data collectioninstruments or procedures)• Selection bias (participants may be differentto begin with)• Attrition (a specific group of people may dropout)IPDET 28 28
Impact Designs• Can use experimental and quasiexperimentaldesigns• Experimental sometimes called the“medical model”– randomly assign participants to a group,group does not know who is in thetreatment or placebo group (“blind studies”)IPDET 29 29
Page 1 and 2: IPDETModule 6:Descriptive, Normativ
Page 3 and 4: Evaluation Design• The total proc
Page 5 and 6: Approach to DevelopmentEvaluationFo
Page 7 and 8: Matrix Elements• Design Matrix Pl
Page 9 and 10: Matrix Elements (page 2)• Data So
Page 11 and 12: Answering DescriptiveQuestions• D
Page 13 and 14: One-shot• Represented as:- X O 1
Page 15 and 16: Cross-sectional• Evaluation quest
Page 17 and 18: Before-and-after Designs• Also ca
Page 19 and 20: Time Series Designs• Look for cha
Page 21 and 22: Time Series• Represented as:- O 1
Page 23 and 24: Longitudinal• Evaluation question
Page 25 and 26: Case Study• Represented as:O 1O 2
Page 27: Answering Cause-EffectQuestions•
Page 31 and 32: Impact and Multi-site andCluster Ev
Page 33 and 34: Before-and-AfterMeasures• Change
Page 35 and 36: Random Assignment• Random: people
Page 37 and 38: Use of Natural Variation• Inconsi
Page 40 and 41: 9 Causal TracingEvidence Sources•
Page 42 and 43: Experimental Design• Called the
Page 44 and 45: Randomized ControlTrials (RCTs)•
Page 46 and 47: Examples of QuasiexperimentalDesign
Page 48 and 49: Case Study Design• Used when the
Page 50: To continue on to theNext Module cl

Module 6: Descriptive, Normative, and Impact Evaluation Designs

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