Reliability and critical differences for an implementation of the coordinate response measure in speech-shaped noise

This study established test-retest reliability and critical differences for an implementation of the coordinate response measure (CRM) for the purpose of detecting significant changes in task performance. In normal-hearing adults, speech stimuli were presented monaurally at 50 dB sound pressure level in speech-shaped noise at signal-to-noise ratios (SNRs) of -12, -9, and -6 dB. Two runs were obtained. Intrasubject and intersubject variability were examined. Performance increased significantly with increasing SNR and in the second run. High variability was observed at each SNR. Critical differences indicated that only large changes in performance would be significant for the CRM as implemented in this study.