Normative values for tests of central auditory processing disorder in children aged from 6 to 12 years old

INTRODUCTION

Central auditory processing disorders (CAPD) can significantly affect the daily functioning of a child, and the first step in determining whether rehabilitation procedures are required is a proper diagnosis. Different guidelines for making diagnoses have been published in the literature, and in various centers normative values for psychoacoustic tests of CAPD have been used internally. The material presented in this paper is based on more than 1000 children and is the largest collection so far published. The aim of this study is to present normative values for tests assessing CAPD in children aged 6 to 12 years, divided by age at last birthday.

METHOD

We tested 1037 children aged 6 to 12 years who were attending primary schools and kindergartens. The criteria for inclusion were a normal audiogram, intellectually normal, no developmental problems, and no difficulties in auditory processing. To evaluate auditory processing all children were given three tests on the Senses Examination Platform: the Frequency Pattern Test (FPT), Duration Pattern Test (DPT), and Dichotic Digit Test (DDT).

RESULTS

The results from 1,037 children allowed us to determine normative values for FPT, DPT, and DDT in seven different age groups (6 through to 12 years). We developed a newapproach, based on quantile-based norms, to determine normative values in each group. Three categories - average, below-average, and above-average - allow for a broader but more realistic interpretation than those used previously. We compare our results with published standards.

CONCLUSIONS

Our study is the largest normative database published to date for CAPD testing, setting a standard for each child by age in years. We used the Senses Examination Platform, a universal tool, to unify standards for the classification of CAPD. Our study can serve as a basis for the development of a Polish model for the diagnosis of CAPD.

A model for cross-cultural translation and adaptation of speech-language pathology assessment measures: Application to the Focus on the Outcomes of Communication Under Six (FOCUS©)

PURPOSE

In the absence of a gold standard, this study illustrates the process involved in the cross-cultural translation and adaptation of the FOCUS^© and its shortened version, FOCUS-34^© (the Parent Form and Instruction Sheet, as well as the Clinician Form and Instruction Sheet), while also determining the social validity and clinical applicability of the translated measure. The target language used as example was Afrikaans, one of the 11 official languages of South Africa.

METHOD

A two-phase cross-cultural translation model was employed in which Phase 1 (comprising a six-step blind back-translation procedure) was sequentially followed by Phase 2 (social validation and clinical applicability of the measure, using focus groups with stakeholders).

RESULT

The extensive process followed in Phase 1 resulted in a clear and appropriate translation acceptable to both stakeholder groups (parents and speech-language pathologists). Both groups questioned the meaning of certain concepts, explored cultural differences and requested the extension of some items. Parents also shared their emotional reactions towards assessment, while therapists focussed on editorial changes to the measures.

CONCLUSION

A framework is proposed for cross-cultural translation and adaptation of assessment measures with suitability in the speech-language pathology discipline.

Validity of the Multiple Auditory Processing Assessment-2: A Test of Auditory Processing Disorder

Purpose A normative study using the Multiple Auditory Processing Assessment-2 (MAPA-2; Schow et al., 2018) was recently completed. With access to these data, the authors extend that work and support a definite construct for auditory processing disorder (APD). The goal here is to examine MAPA-2 reliability and validity (construct, content, and concurrent). Evidence for the APD construct is further buttressed by measures of sensitivity and specificity. Results of MAPA-2 testing on children diagnosed with learning disability (LD), attention-deficit/hyperactivity disorder (ADHD), and specific language impairment (SLI) are included. Method Normative data (previously published as the MAPA-2) allowing derivation of these findings included a representative sample of 748 children (53% girls) ages 7-14 years tested by 54 speech-language pathologists and audiologists in 27 U.S. states. The authors examined diagnostic accuracy based on the American Speech-Language-Hearing Association (2005) criteria (index test) for confirmed cases of APD. The index was also used to identify listening problems for three other diagnostic categories (LD, ADHD, and SLI). Validated questionnaire responses from parents and school personnel allowed incorporation of functional measures widely supported in APD diagnosis but unavailable with other normative and sensitivity/specificity studies. Results Reliability and validity were both satisfactory, and diagnostic accuracy for an APD group of 18 (28% female) compared to the remaining typical group of 625 yielded 89% sensitivity and 82% specificity. The remaining three groups (LD, ADHD, and SLI), where comorbidity was expected to be about 50%, had APD-type listening problems with a prevalence ranging from 52% to 65%. Conclusions Current results provide important evidence for the construct of APD. The MAPA-2 can be administered by an audiologist or speech-language pathologist. A similar diagnostic protocol in Australia yielded positive therapeutic gains. Further study is encouraged to determine if the present positive findings will be found in future research.