PSYB01H3 Chapter Notes - Chapter 9: Repeated Measures Design, Internal Validity, Time Series
Document Summary
Single-subject designs/single-case designs: n=1; allows a systematic procedure for testing changes in a subjects behaviour. Useful in clinical processes of assessment, establishing intervention goals and specific outcomes, providing intervention and evaluating progress. Treatment phase(s), with all subjects exposed to each phase. Repeated measurement: must be able to measure subjects status on target problems at regular intervals usually repeatedly both before and during intervention. If unable to do it prior to intervention may still be able to construct preintervention measures by using data already collected or by asking about past experiences. Baseline phase: baseline phase (a): represents the period in which the intervention to be evaluated is not offered to the subject (control group) ; several measures of dv are taken (increases internal validity, patterns. Stable line: line that is relatively flat with little variability in scores; desirable as easy to detect changes. Trend: either increasing or decreasing during baseline period. Linear: increasing or decreasing at a constant rate.
