Blair

In-Depth Notes on Task Analysis Training Procedures Comparison

Overview of Task Analysis Training Procedures

  • Authors: Bryan J. Blair, Julie S. Weiss, William H. Ahearn

  • Publication: Education and Treatment of Children, August 2018

  • Study Focus: Comparison of most-to-least physical and vocal prompt fading methods in training complex response chains.

  • Participants:

    • Francis: 12-year-old boy with Autism.

    • Michael: 12-year-old boy with Pervasive Developmental Disorder.

Key Concepts

  • Behavior Chains:

    • Composed of discrete, observable units of behavior.

    • Each unit typically involves an antecedent, behavior, and consequence.

    • Identifying controlling stimuli poses challenges due to environmental stimuli.

  • Prompt Fading Methods:

    • Most-to-Least Physical Prompt Fading: Gradually reducing physical assistance from hand-over-hand to no assistance.

    • Most-to-Least Vocal Prompt Fading: Reducing verbal instructions over time.

    • Various methods include:

    • Hand-over-hand guidance

    • Guidance at forearm, upper arm

    • Light touch/shadowing

    • Independent prompts

Research Methodology

  • Dependent Variables:

    • Number of steps performed independently.

    • Number of errors per session.

    • Number of sessions to reach mastery criterion.

  • Procedure:

    • Edible preference assessments before training sessions.

    • Pre-training assessment on abilities to follow directives, selecting shapes/colors.

    • Training conducted in controlled settings with specific Tinkertoy constructs.

  • Training Setup:

    • Each session consisted of 10 trials using specific prompting methods.

    • Different constructs used to minimize bias from prior knowledge.

Results

  • Francis:

    • Mastery with physical prompts took more sessions than with vocal prompts.

    • Averaged more errors with vocal prompts but completed tasks faster.

  • Michael:

    • Showed quicker mastery with vocal prompts but more errors compared to physical prompts.

  • Data Observations:

    • High interobserver agreement (97.9%); procedural integrity (%98+).

Discussion

  • Both prompting methods were effective but showed differences based on participants.

  • Variability in acquisition could be influenced by individual behavior patterns and prior knowledge.

  • Study suggests further investigation of vocal prompts due to higher error rates despite faster acquisition.

  • Indicate future research directions focusing on wider participant samples and broader constructs.

Limitations

  • Small sample size (only two participants); findings may not generalize.

  • No baseline pre-training probe; unknown if participants could perform tasks previously.

Conclusion

  • Vocal prompting may be an effective alternative to physical prompts in specific contexts.

  • Caution against concluding results as absolute due to study limitations.

References

  • Early studies on task analyses and behavior chains indicated importance of prompt hierarchies.

  • Influence of prompt consistency and fading strategies stressed in literature.

  • Further studies required to confirm findings and explore participants’ unique characteristics in task acquisition.