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PSYC 2360 (100)
Chapter 11

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PSYC 2360
Dan Meegan

Chapter 11: Single Case, Quasi- Experimental and Developmental Research 1. Single Case experimental designs  Clinical, counselling, educational, and applied settings  Determine whether an experimental manipulation had an effect on a single research participants  Subject’s behaviour measured over time suring baseline control period  Change in behaviour between baseline and treatment period indicates effectiveness of manipulation  Could be other explanations for the change a) reversal designs: demonstrate reversal of manipulation -A (baseline period) –B (treatment period) –A (baseline period .. ABA design -may also use control group b) Multiple baseline Designs: effectiveness of treatment is demonstrated when a behaviour changes only after the manipulation is introduced. - Must observe a change under multiple circumstances for manipulation to have been effective - Can be measured across behaviours or across situations Program evaluation: research on programs that are proposed and implemented to achieve some positive effect on a group of individuals ex: DARE in schools  Phases of program evaluation research  Rossi et al. identify 5 types of evaluations; each attempts to answer a different question about the program. o First: Needs assessment studies ask whether there aree, in fact, problems that need to be addressed to the target population o Second: Program Theory assessment: may involve the collaboration of researchers, service providers, and propspective clients of the program to determine that the proposed program does in fact address the needs of the targeted population o Third: Process evaluation: when the program is under way, the evaluation researcher monitors it to determine whether it is reaching the target population, whether it is sttracting enough clients and whether the staff is providing the planned services. o Fourth: outcome evaluation: Are the intended outcomes of the program being realized? The evaluation researcher must devise a way of measuring the outcome and then study the impact of the program are like, and we need to know what the would be like if they had not completed the program o Fifth: efficiency assessment: Once it is shown that a program does have its intended effect, researchers must determine whether its worth it 2. Quasi-Experimental Designs  Addresses the need to study the effect of an independent variable in settings in which the control features of true experimental designs cannot be achieved  Examine impact of ind
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