Define ‘between subjects’ group design:
Participants are randomly assigned to experimental group/control group. Results of both groups are compared.
Define ‘within subjects’ group design:
Repeated measures taken of same participants across conditions. Everybody gets treatment but at different stages.
What are the limitations to single case designs?
A study involving a small group of people will not have much external validity/generality.
To demonstrate external validity what should happen to single case research?
It should be repeated.
Baseline:
Measurement of the behaviour prior to implementation of the IV.
When can an ABAB design be used?
- When behaviours are likely to reverse
2. When behaviours are not dangerous to the person.
What is ‘Alternating Treatments’ design?
A design that allows simultaneous comparison of treatments to baseline by using rapid, RANDOM, alternations of the IV.
Alternating treatments requires that..
treatments are independent of one another; using the two different treatments in close temporal proximity wont result in carry-over effects.
Group designs show A_______ differences whereas single case designs show I_________ differences.
Average; Individual.
