Which factor is most important when selecting vocabulary for an AAC system?

• A. Vocabulary relevant to daily routines
• B. Emphasize abstract philosophical terms
• C. Exclude multilingual symbols
• D. Use only high-frequency verbs

Answer: (A)

The most important factor when selecting vocabulary for an AAC system is making sure the words and phrases match the user’s daily routines and practical communication needs. When the vocabulary is aligned with everyday activities, the user can reliably express wants, needs, options, and information in real-life contexts, which supports independence and smoother interactions with family, friends, teachers, and caregivers. Think about the kinds of things the person talks about every day: objects they use, actions they perform, questions they have, and short, useful phrases that help them participate in conversations or request help. Include language for the environments they spend time in—home, school, work, community settings—and for the people they talk with most.

Abstract terms or philosophical language tend to be less useful early on because they don’t enable immediate, practical communication. Focusing only on high-frequency verbs can leave out important nouns, pronouns, and phrases that make daily conversations flow. If the user communicates in more than one language, including multilingual symbols can improve accessibility. But the guiding aim is clear: build a vocabulary that is functional, easily navigable, and truly supports everyday communication.