Ch 5,7 from Evaluating Research in Communicatie Disorders
Terms
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- 5 phases of research
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Research concerned with hypothesis development, safety issues and risk factors.
Development of treatment methods and outcomes measures, and pilot studies of potential treatment effects.
Randomized clinical trials for evaluating treatment efficacy.
Post marketing studies of long-term effectiveness and safety of treatmtnet.
Follow-up studies of cost-effectiveness adn consumer satisfaction. - Categories of Design
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Pre Experimental
True Experimental
Quasi Experimental - Clinical Trial
- use results based on a limited sample to generalize to a population
- Counter Balance Design
- people get all conditions, Quasi
- Effectiveness/Efficacy
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-refers to results of the procedure applied in everyday practice
-what you expect of a clinical procedure at its best - External Validity
- Interaction of pre-testing, selection, reactive arrangements, multiple treatment interference
- Internal Validity
- history, maturation, testng, instrumentation, statistical regression, selection, mortality, interaction, Hawthorne effect
- Introduction Section of Research
- Title, Abstract, General Statement of Problem, Rationale, Review of Literature
- Misc. Considerations
- Definitions of terms, Limitations to the study
- One Group Pre, Post Test
- G OXO Within group design (still weak design) Only one group, the Pre-test could affect post test - Pre-Experimental
- One Shot Case Study
- G XO (weak) - Pre-Experimental
- Post Test Only Control Group
- G1 R XO, G2 R_O, True Experimental
- Pre-Experimental
- "weak design", subject ot criticism based on internal & external validity
- Pre-Test Post-test Control Group Design
- G1 ROXO, G2 RO_O. True Experimental
- Quasi-Experimental / True Experimental
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-Not as strong as experimental, some good in terms of generalizability, baseline- variable-follow up
-Strong Designs. Typically involve random assignment - Seperate Sample Pre-Test Post-Test
- G1 R O (X), G2 R _ X O. eliminates pre&post interference
- Soloman Four Group
- G1 ROXO, G2 RO_O, G3 __XO, G4 __O, True Experimental
- Static Group Comparisson
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G1 X O
G2 O - Time Series
- OOO X OOO, better generalizability. Quasi
- Treatment Efficacy Research/Treatment Outcomes Research
- proves treatment benefits / identifies treatment benefits