Acoustic reflexes of children with and without central auditory processing disorders

Abstract

According to international standards, determination of acoustic reflex thresholds (ART) is one of the established objective measurements in the diagnostic workup of central auditory processing disorders (CAPD). However, there is still no evidence for the significance of ART in CAPD diagnosis. This study tested 57children with proven CAPD and 50healthy children (control group) with regard to group differences in mean ART (sine tones or bandpass-filtered noise). Additionally, it was investigated whether there were group differences between the mean dissociations of ART for sine tones or bandpass filtered noise. Neither ipsi- nor contralaterally were significant clinically relevant group differences (p< 0.050) between the mean ART of children with and without CAPD found. After Bonferroni correction, asignificant group difference in the percentage of non-triggered reflexes was only observed with left-sided contralateral 2kHz stimuli. Concerning the number of dissociations ≥20dB, no significant group differences (p< 0.050) were detected either ipsi- or contralaterally (Fisher's test). The results of the study seem to indicate no clinically relevant ability of ART measurements to distinguish between children with and without CAPD. This renders the benefit of ART measurements for CAPD diagnosis questionable.