Single-group design involves administering a treatment to a group and measuring the effects, without a control group. It requires continuous assessment before, during, and after intervention to measure variability in responses. Advantages include ease of implementation and illustrating dramatic changes, while disadvantages are lack of controls and limited application. Common single-subject designs include AB, withdrawal, multiple baseline, changing criterion, and multiple probe designs.

2. SINGLE-GROUP DESIGN
• This design involves a single treatment with two
or more levels.
• A design in which a group of subjects are
administered a treatment and then measured. (
or observed)
• It does NOT have an experimental group or
control group.

3. REQUIREMENTS OF SINGLE-SUBJECT DESIGNS
• Continuous assessment
• Baseline assessment
• Variability in data:

4. PHASES WITHIN SINGLE-SUBJECT DESIGN
• Baseline
• Intervention
• Reversal

5. EXAMPLE:
Problem:
• Effect of leaf extract A to Bacterium A
• Sampling Unit: Leaf extract
• Subjects: Bacterium A grown on petri plates.

7. ADVANTAGES
• Ease of implementation
• Illustrates dramatic changes
• Self-Controlling
• Emphasizes recognizable clinical change
• Flexible under a variety of conditions
• Provides detailed description of the process
necessary to effect significant change.

8. DISADVANTAGES
• Lack of controls
• Limited Application

9. LIMITATIONS
• Carry-over effects
• Order effects
• Irreversibility
• Ethical problems

10. DESIGN TYPES
 AB Design
Withdrawal Design- ABA
 Multiple Baseline Design
 Changing Criterion Design
 Multiple Probe Design
 Multi-Treatment Design
 Alternating Treatments Design

11. 1.A design in which a group of subjects
are administered a treatment and then
measured.
2-4. Requirements of single subject
designs
5. Phases within single-subject design
6-8. Advantages
9-10.. Give the types of design.

12. QUIZ!!!!!!!!!!!!!!!
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