Intro to Research Methods Lecture 8 13-03-21 4:49 PM
Chapter 11- Small n Designs
• NO Control Group
1. When you use large N’s, group averages are taken and they are
contaminated by individual differences.
2. Sometimes it’s necessary because subjects with specific requirements are
hard to find.
**Will not be tested on learning or psychophysics**
**This material is not to be confused for Case Studies, that is classified
under Descriptive Research**
3 Required Elements
1. Target Behaviour- must be operationalized.
2. Establish a baseline of responding- frequency of rate of responding.
3. Introduce treatment and continue to monitor the behaviour.
**Not to be confused with pre- post- studies**
A (baseline) - B (treatment) design
A (baseline) -B (treatment) - A (withdraw treatment) design
A (baseline) – B (treatment)- A (withdraw treatment) – B (treatment)
1. Sometimes a withdrawal design isn’t appropriate, especially if the
“treatment” involves teaching a skill.
2. This design can be unethical if the target behaviour is a harmful one. Multiple Baseline Designs (in applied research)