Lotfi Y, et al. - In the present study, the researchers explored spectro-temporal modulation (STM) detection and its relation to speech perception in children with auditory processing disorder (APD), defined as a deficit in the perceptual processing of acoustic information in the auditory system that may also contribute to the decreased spectro-temporal resolution, and contrasted the outcomes with aged-matched normally developed children. Participants in the study were 35 children with APD and 32 normal hearing children (8 to 12 years old). According to findings, one of the underlying factors of reduced STM detection performance in children with APD can be the altered encoding of spectro-temporal acoustic cues in the auditory nervous system. Results indicate that poor ability to extract STM cues in children with APD may be an underlying factor in challenging situations for their hearing problems in noise and impaired speech perception.