Optimally efficient and effective intervention for children with speech sound disorder (SSD) is increasingly shown to depend on the delivery of approaches that map clearly to the sub-type of the child’s SSD and follow the evidence-base with fidelity (e.g., Crosbie et al. 2005, Lousada et al. 2013) in contrast to the eclectic approach favoured by most Speech and Language Therapists (e.g., Hegarty et al. 2020).

Optimally efficient and effective intervention for children with speech sound disorder (SSD) is increasingly shown to depend on the delivery of approaches that map clearly to the sub-type of the child’s SSD and follow the evidence-base with fidelity (e.g., Crosbie et al. 2005, Lousada et al. 2013) in contrast to the eclectic approach favoured by most Speech and Language Therapists (e.g., Hegarty et al. 2020).

Optimally efficient and effective intervention for children with speech sound disorder (SSD) is increasingly shown to depend on the delivery of approaches that map clearly to the sub-type of the child’s SSD and follow the evidence-base with fidelity (e.g., Crosbie et al. 2005, Lousada et al. 2013) in contrast to the eclectic approach favoured by most Speech and Language Therapists (e.g., Hegarty et al. 2020).

Optimally efficient and effective intervention for children with speech sound disorder (SSD) is increasingly shown to depend on the delivery of approaches that map clearly to the sub-type of the child’s SSD and follow the evidence-base with fidelity (e.g., Crosbie et al. 2005, Lousada et al. 2013) in contrast to the eclectic approach favoured by most Speech and Language Therapists (e.g., Hegarty et al. 2020).

A phonetically transcribed representative sample of a child’s speech is the first step to support effective clinical decision-making for children with speech sound disorder (SSD). Moreover, further analysis of child speech is needed for some children with moderate-severe SSD, beyond that supported in published assessments such as the DEAP.

Optimally efficient and effective intervention for children with speech sound disorder (SSD) is increasingly shown to depend on the delivery of approaches that map clearly to the sub-type of the child’s SSD and follow the evidence-base with fidelity (e.g., Crosbie et al. 2005, Lousada et al. 2013) in contrast to the eclectic approach favoured by most Speech and Language Therapists (e.g., Hegarty et al. 2020).

Transcription informs every decision we take about intervention for a child when we tackle their speech sound problem. By carrying out and examining a transcription we come to understand a child’s speech profile, what we should do and what else we need to know. (Child Speech Disorder Research Network, 2017, p. 1).

Optimally efficient and effective intervention for children with speech sound disorder (SSD) is increasingly shown to depend on the delivery of approaches that map clearly to the sub-type of the child’s SSD and follow the evidence-base with fidelity (e.g., Crosbie et al. 2005, Lousada et al. 2013) in contrast to the eclectic approach favoured by most Speech and Language Therapists (e.g., Hegarty et al. 2020).

The complexity approach is an evidence-based intervention for children with moderate to severe consistent phonological disorder. It is designed to improve the efficiency of intervention.