PSYCO282 Lecture Notes - Lecture 7: Systematic Review, Clinical Trial, Meta-Analysis
20 Sep 2016
School
Department
Course
Professor
Document Summary
A-b-a-b ( or reversal design): it has 2 baseline phases and two treatment phases. It examines same behaviour, in the same client, in the same setting. Multiple-baseline designs: more than one a-b design is carried out. The baselines may vary in length before treatment begins, and intervention phase is staggered across various conditions. It can also provide evidence that treatment is e ective. Multiple baseline across subjects: apply treatment to several di erent people. Potential problem: treatment may spread across conditions during supposed baseline phase, precluding cause-and-e ect conclusions. Alternating treatments ( or multi-element design): two or more treatments are applied in the treatment phase- not simultaneously, but rapidly altering. Fractionation is the vertical separation between treatment curves. Changing-criterion design: criterion for successful treatment progressively changes (usually becoming more stringent over time). This works well for behaviours that can be approximated gradually. The best research is when they used randomized controlled trials.
