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Practical Methodology of Cognitive Tasks Within a Navigational Assessment

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An activity systemic approach to augmentative and alternative communication.

Per-Olof Hedvall¹, Bitte Rydeman

¹Lund University, Lund, Sweden. per-olof.hedvall@certec.lth.se

Augmentative and Alternative Communication (Baltimore, Md. : 1985)

|November 25, 2010

Summary

Cultural-Historical Activity Theory (CHAT) helps understand factors influencing augmentative and alternative communication (AAC) use. This research explored user experiences with voice output communication aids (VOCAs) and vocabulary design.

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Area of Science:

Human-Computer Interaction
Assistive Technology
Sociocultural Psychology

Background:

Augmentative and Alternative Communication (AAC) systems are crucial for individuals with communication impairments.
Understanding the multifaceted factors influencing AAC use is essential for effective design and implementation.
Voice Output Communication Aids (VOCAs) are a common form of AAC, but their vocabulary design presents unique challenges.

Purpose of the Study:

To explore how Cultural-Historical Activity Theory (CHAT) can illuminate the factors affecting the use of augmentative and alternative communication (AAC).
To analyze the activity-based vocabulary design of voice output communication aids (VOCAs) through the lens of CHAT.
To identify key themes influencing the user experience with AAC, specifically concerning pre-stored phrases in VOCAs.

Main Methods:

A 3-year project involving qualitative data collection.
Interviews with four individuals using AAC and their assistants, focusing on shopping activities.
Application of the CHAT Activity Diamond model for data analysis.

Main Results:

A complex interplay of human, artifactual, and natural factors was identified.
Six key themes emerged: Attitude/Preference, Expectation/Trust, Goal/Power, Place/Space, Time/Learning, and Usability/Accessibility.
These themes provide a nuanced understanding of AAC use in real-world activities.

Conclusions:

Cultural-Historical Activity Theory (CHAT) offers a robust framework for analyzing AAC use.
The identified themes highlight critical areas for improving AAC system design and user support.
Activity-based vocabulary design, informed by CHAT, can enhance the effectiveness and accessibility of VOCAs.