Stimulability is defined as the client's ability to accurately produce a phoneme when provided a model for it. Typically, stimulability is initially achieved at sound level but can be identified at various production levels. These levels can include syllable, word, and sentence. When a sound becomes stimulable, it indicates to the SLP that the sound is ready to be targeted in traditional articulation therapy (within each level). When sounds are stimulable, it shows a readiness for therapy. 

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One goal of stimulability is to focus on increasing the child's phonemic inventory using visual speech sound cue cards and hand motions. Overall, this approach is geared towards younger children who are not stimulable for consonants. This has also been effective for older children who have Childhood Apraxia of Speech. 

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The video below will outline procedures of the Stimulability Approach: