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.

REQUIREMENTS OF SINGLE-SUBJECT DESIGNS

• Continuous assessment

• Baseline assessment

• Variability in data:

PHASES WITHIN SINGLE-SUBJECT DESIGN

• Baseline

• Intervention

• Reversal

EXAMPLE:

Problem:

• Effect of leaf extract A to Bacterium A

• Sampling Unit: Leaf extract

• Subjects: Bacterium A grown on petri plates.

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.

DISADVANTAGES

• Lack of controls

• Limited Application

LIMITATIONS

• Carry-over effects

• Order effects

• Irreversibility

• Ethical problems

DESIGN TYPES

AB Design

Withdrawal Design- ABA

Multiple Baseline Design

Changing Criterion Design

Multiple Probe Design

Multi-Treatment Design

Alternating Treatments Design

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.

QUIZ!!!!!!!!!!!!!!!!!