Single subject design Notes
Question – Discuss the different types of single subject design.
Answer – The following four types of basic designs are commonly used in single subject design:
Types of Single Subject Design –
1 Withdrawal design – As the name implies, the experimental treatment started after the baseline period is withdrawn. Treatment can be presented systematically and can be withdrawn in many ways. The basic argument is to establish an operator level, to introduce the independent variable, to focus on any change in the response rate, to see if the response rate is returned at the operator level and after that . Sometimes the clearance design is referred to as a wrongly re-design. Thus, reversal refers to removal and withdrawal treatment variables that are applied after the baseline period; I.e. “reversal” in the baseline.
2 Alternating treatments design – A special subclass of A-B-A-B design is that where the baseline is not required. Rather, A and B are two different treatments, which are alternately performed randomly with a single-treatment. This is thus withdrawn and replaced, not with a baseline but rather a With other treatments. The purpose for which alternative treatment design is used is to attempt to evaluate the relative efficacy of two or more treatments.
3 Multiple baseline design – As its name implies, many basic lines are established together before the administration of treatment in this design. These designs are basically replica designs. In this design, the effect of independent variables is assessed in many different behaviors emitted by the same participant. The researcher here treats many consistent behaviors, which is a simultaneous behavior in the person. He establishes the baseline for each behavior. After this, a treatment is offered for a target behavior. If this behavior changes after treatment and other behaviors (control) remains stable on the baseline, then the researcher concludes that the treatment is affecting behavior. After some time the treatment is applied to the second goal behavior of the corresponding behaviors and its effects are recorded.
4 Changing criterion design – The basic strategy of changing criteria design is that the effectiveness of treatment is measured according to the gradual changes specified in the event of behavior during the intervention period. Criteria are the real components of intervention and specify that behavior should increase in order to match the changes in the criteria. Like all other single subject designs, the changing criterion design starts with a baseline phase (A) in which records are made from a single class of behavior. The difference is that there are several sub-steps during intervention, with each separate pre-installed criteria.