Quantitative Research (Part 2)
Single-Subject Research
Characteristics
>data are collected and analyzed for one subject at once.
>to study changes in behaviour of an individual after treatment is being given.
Single-Subject Designs
>the graphing of single-subject design
>line graphs
>dependent variable: vertical axis
>a sequence of time: horizontal axis
>the first: baseline
>the second: condition line
1. The A-B Design
>A-Baseline, B-Condition line
>the researcher does not know whether the change of behaviour is due to the treatment or not.
2. The A-B-A Design
>also known as reversal design
>A-Baseline, B-Condition line, A-Baseline
>present stronger evidence
>ethical disadvantage: leaving the subject to the A condition.
3. The A-B-A-B Design
>A-Baseline, B-Condition line, A-Baseline, B-Condition line
>increase the effectiveness as both conditions are tested twice.
>the ethical disadvantage is avoided.
4. The B-A-B Design
> B-Condition line, A-Baseline, B-Condition line
>to be implemented when the behaviour of subject is disturbing to the point where the baseline could not be established
5. The A-B-C-B Design
>A-Baseline, B-Condition line, C-Contigent Condition line, B-Condition line
6. Multiple-Baseline Designs
>An alternative to the A-B-A-B Design
>to be conducted when it is impossible to create baseline or condition line
>the researcher determines the baseline and the condition during the process.
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