Performance of children with speech sound disorders in the dynamic evaluation of motor speech skills

The PraxiFala Battery: A diagnostic accuracy study

PURPOSE

To present the sensitivity and specificity and establish cutoff points (receiver operating characteristic [ROC] curve) for the PraxiFala Battery.

METHOD

The sample included 308 Brazilian-speaking children aged 3;0-7;11. Twenty-one children had motor speech disorders (MSD), 58 children had phonological disorder (PD), and 229 had typical speech (TS) development. Participants were administered the PraxiFala Battery, which contains verbal (word and sentence production), nonverbal (orofacial praxis), and diadochokinetic tasks. The sensitivity and specificity of items in each task were then calculated using ROC curves.

RESULT

Total scores on the verbal (word production), nonverbal (orofacial praxis), and diadochokinetic tasks had good sensitivity and specificity. The only scores with poor sensitivity and specificity in differentiating between TS, PD, and MSD were consistency and prosody in the verbal tasks (sentence production), and item /ta/ in the diadochokinetic task. Area under the ROC curve (AUC) values were greater than 0.7 for most items in the comparison between TS vs. MSD and PD vs. MSD. AUC values were poor or fair among children with TS and PD, suggesting that this instrument may not be accurate in identifying these groups.

CONCLUSION

The verbal, nonverbal, and diadochokinetic tasks in the PraxiFala Battery had good sensitivity and specificity.

A systematic scoping review of the literacy skills of children with childhood apraxia of speech: Recommendations for best practice and further research

PURPOSE

Little is known about the literacy skills of children with childhood apraxia of speech (CAS) or effective methods for teaching them to read. This systematic scoping review aimed to synthesise what is known about this issue.

METHOD

Nine databases were searched to identify relevant articles. Included articles were categorised by study design, quality, and confidence of CAS diagnosis.

RESULT

Twenty-three articles were included, 17 described literacy skills of children with CAS and six trialled literacy interventions. Children with CAS had early skills deficits that manifest as literacy difficulties in the later school years and beyond. They frequently had poorer outcomes compared with both typical readers and children with other speech disorders. Both the extent of literacy impairment and responsiveness to intervention appear to be related to the severity of speech impairment. Four literacy interventions for children with CAS were identified.

CONCLUSIONS

Children with CAS are at high risk of literacy difficulty and may require early literacy intervention to help them attain academic success. Further research is warranted to determine the longer-term literacy outcomes of children with CAS, appropriate means of assessment, and whether a systematic synthetic phonics approach is an effective form of literacy instruction for this population.