Textbook Notes (368,552)
Canada (161,962)
Psychology (9,696)
PSYB01H3 (581)
Nussbaum D (52)
Chapter 9

Chapter 9 - Small N and Single Subject Designs

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Nussbaum D

Chapter 9SmallN and SingleSubject Designsie Sam He is outgoing friendly and energetic also frequently chased pushed punched and kicked peers and repeatedly hit himself on his forehead Sam is diagnosed with schizoaffective disorder bipolar type mild mental retardation and seizure disorder took a lot of medication Plan is to modify Sams behaviour focused on reinforcers that Sam had identified himself Dr Sarah W Bisconer and her colleagues 2006 mentioned reinforcers ranging from having diet soda or hot chocolate helping with meals etc Would these reinforcers have the desired effectThe team psychologist developed a behaviour checklist to completeSinglesubject designs provide alternative more systematic procedure for testing for changes in subjects behaviour Also recommended y BF Skinner for behavioural analysis required in operant conditioning experimentsSinglesubject designssinglecase designs offer alternative to group designs N1 but also apply to smallN 19Foundations of Small NDesignsSmallN and singlesubject designs have 4 components 1 Repeated measurement of dependent variable 2 Baseline phase 3 Treatment phases with all subjects exposed to each phase 4 Graphic display perhaps supplements by statistical analysisRepeated MeasurementRepeated measurement of dependent variabletarget problemYou must be able to measure subjects status on target problem at regular time intervalsIn Sams example nursing staff assessed behaviour 3 timesday for 3 months before the intervention began and then for 39 months after Alternatively repeated measures of the dependent variable can begin when client is receiving an intervention for other problemsSometimes you cant delay intervention either because there is a crisis or bc to delay intervention would not be ethically appropriateWhen using client records youre limited to information availableanother option is to ask clients about past behaviourSometimes when using retrospective data is quite feasible and realistic ie agencyfinding an outreach method that would increase number of referrals Baseline PhaseBaseline phaseA The period where intervention to be evaluated is not offered to the subjectRepeated measure reflects the status of the client on dependent variable prior to implementation of intervention Provides 2 aspects of control to control group in group design 1 In a group design we expect the treatment group to have different scores than the control group after the intervention The subject serves as control to establish patterns of score assume that the baseline pattern would continue its course 2 In a control group design RA controls for threatens to internal validityPatternsStable line pattern A line that is relatively flat with little variability in score WANT bc changes can easily e detected and there are FEW PROBLESM OF TESTING INSTRUMENTATION STAT REGRESSION AN DMATURATION IN DATA
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