DTTC in Speech Therapy

What does DTTC stand for?

DTTC stands for Dynamic Temporal and Tactile Cueing. It's a treatment developed by Edythe Strand, originally as an adaptation of Integral Stimulation, and refined specifically for children with childhood apraxia of speech. It's grounded in principles of motor learning — repetition, variability, feedback, and shaping.

Who is DTTC for?

DTTC was designed for children with childhood apraxia of speech (CAS), particularly those who are severely unintelligible or have very limited verbal output. The evidence base is strongest for younger children (typically 2–7 years) with a confirmed or suspected CAS diagnosis, not for children whose primary difficulty is phonological or articulation.

The DTTC cueing hierarchy

DTTC uses a movable hierarchy: the clinician provides as much support as the child needs to succeed, then fades that support based on performance. The core levels are:

1. Simultaneous production — clinician and child produce the target together, with the clinician providing maximum temporal and tactile support.
2. Direct imitation — clinician models, child imitates immediately.
3. Delayed imitation — a brief pause between the model and the child's production.
4. Spontaneous production — child produces the target without a preceding model, elicited by a picture, question or context.

The clinician moves up or down the hierarchy trial-by-trial based on accuracy. When the child succeeds, support is reduced; when they struggle, support is added back in.

Key principles of motor learning in DTTC

• Mass practice early, distributed practice later.High trial counts on a small set of targets while learning, then fewer trials spread across time to promote retention.
• Blocked practice early, random practice later.Practise one target repeatedly first, then interleave targets.
• Knowledge of performance during acquisition, fading to knowledge of results as the child becomes more accurate.
• Slowed rate and prosodic support as the "temporal" part of the name suggests, with tactile support at the jaw, lips or face as needed.

How is DTTC different from PROMPT?

Both use tactile cueing, but they're distinct treatments. PROMPT is a system of specific tactile-kinesthetic prompts applied to the face that specify place, manner, and timing of individual phonemes. DTTC uses tactile support more flexibly, focused on shaping movement sequences rather than individual phonemes, and is anchored in a specific motor-learning hierarchy.

Evidence base

DTTC has a small but growing body of single-case experimental and small-group studies showing improvements in speech accuracy and functional communication in children with CAS. It's one of the treatments most consistently recommended in position statements on CAS and in the ASHA practice portal, alongside other motor-programming approaches. For any individual child, the strength of the evidence depends on the specific outcome, severity and age.

Getting citations for your clinical reasoning

Ask SLPGPT for the current evidence base on DTTC — or on any CAS treatment — and you'll get a peer-reviewed reference list to paste into your report or funding application. First question is free, no signup.