Topic 5 Single Subject Design Flashcards
Single Subject design
Demonstrates functional relationship between changes in the IV and DV
** provides empirical verification behavior occurred because of intervention
Components of single-subject design
- Specify the problem
- Select the design
- Measure the problem
- Repeated Measures
- Baseline
- Analysis of data
Foundations of single-subject designs
a. Repeated Measurement
i. Behavior is repeatedly measured before, during and after treatment to determine if any change has occurred
b. Baseline data- control condition-
i. Subject’s performance in the absence of the IV as an objective basis for detecting change
1. Descriptive- describe the existing level of performance
2. Predictive- predict level of performance for future with intervention
c. Treatment- time period during which intervention is implemented
i. Visual analysis
d. Graphing
Components of single subject design
Depicted by using A and B
a= the baseline and withdrawal phases
b= treatment phase
AB Design
ii. Most basis single-subject design
Reversal Design
a. Repeated measures of behavior in given setting
b. Requires at least 3 consecutive phases:
i. Initial baseline (A)
ii. Intervention (B)
iii. Return to baseline (A)
Repeated Reversals (ABABAB)
a. Replication present more convincing demonstration of functional relation
b. Becomes redundant
Visual Analysis of Single Subject Designs
a. Determine the effectiveness of the IV by visual examination
i. Research of Single subject design research must be cautious in interpreting tx effectiveness from visual inference
Visual Analysis of Single Subject Designs
3 parameters-
important to visual data and graphs
i. Trend- direction of the behavior before and after
ii. Slope- degree of slope- indicates how strong trend is
iii. Level- level before treatment is important in deterring significance if change
