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Module 3: Baseline Phase in Single Case Experimental Designs

Module 3: Baseline Phase in Single Case Experimental Designs

Presented by
Associate Professor Amanda Richdale
Olga Tennison Autism Research Centre, La Trobe University

 

Baseline is similar to the ‘pre-test’ condition in a pre-post test design.

The key difference here is that we measure the target behaviour on multiple occasions to see if any change/variability in the behaviour is occurring naturally (increasing, decreasing, fluctuating).

No intervention is introduced during baseline conditions.

At least 3 data points are necessary (except in rare cases).

Baseline sessions are valuable from both clinical and research perspective:

  • Allow us to apply and test your data collection process.
  • Allow us to better understand clients’ strengths and needs, and to refine intervention if necessary.
  • Important to explain the importance and benefits of baseline sessions to client/carers/caregivers to avoid misconceptions.

Module 4 Graph

Activity

Now define the intervention (independent variable) that you will use in an attempt to change the target behaviour.

Ensure that your definition is written in a way that it addresses the following questions:

  • In what context will the intervention be provided?
  • What is the nature of the intervention?
  • What will be the frequency of the intervention?
  • What will be the intensity of the intervention?
  • What will be the duration of the intervention?

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