Chapter_14_-_Single-subject_Designs

Chapter_14_-_Single-subject_Designs - Single-subject...

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Unformatted text preview: Single-subject Research Designs Single-subject Research Designs PSYC 310 – Chapter 14 PSYC 310 – Chapter 14 Small N Designs Small N Designs Small-N designs are single-subject experiments – they Small-N designs are single-subject experiments – they are used are used frequently in special education and clinical settings (behavioral modification). • they are true experiments. they are true experiments. • they involve manipulation of one or more IVs they involve manipulation of one or more IVs and comparison of outcome on the DV. and comparison of outcome on the DV. • causal statements can be made if there is causal statements can be made if there is adequate control of confounding variables. adequate control of confounding variables. Small N Designs Small N Designs Although there are several variations on the Small N design, typically, they involve observing an individual before and after treatment. The number of observations made before and after treatment varies across designs. Other factors that can also vary are the number of before and after treatment cycles, and also the number of treatments (IVs). Small N Designs Small N Designs Do not use statistical methods to analyze data – instead results are represented visually on a graph & you look for meaningful before & after differences. BEFORE TREATMENT AFTER TREATMENT TIME - OBSERVATIONS TREATMENT EFFECT PHASE 1 PHASE 2 Small N Designs Small N Designs BEFORE TREATMENT AFTER TREATMENT PHASE 1 PHASE 2 BEFORE TREATMENT AFTER TREATMENT PHASE 1 PHASE 2 Look for consistency and change in levels....
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