Effect of auditory status on visual emotion recognition in adolescents.

Adolescents with severe to profound hearing loss who wear cochlear implants (CIs) experience significantly more peer problems compared to peers with typical hearing (TH). Differences in peer social dynamics may relate to perception not only of message content, but also message intent based on a speaker's emotion from visual (e.g. facial expressions) and auditory (e.g. prosody) cues. Pediatric CI users may experience greater difficulty with auditory emotion recognition due to an impoverished signal representation provided by the device, but the effect of auditory status on visual emotion recognition yields conflicting results. OBJECTIVES: The current study examined accuracy and speed of visual emotion recognition in adolescents with CIs and peers with TH. METHODS: Participants included 58 adolescents (10-18 years) stratified by auditory status: 34 CI users and 24 TH peers. Participants identified the intended emotion (i.e. happiness, sadness, anger, fear, disgust, and surprise) of static images of faces displayed on a computer screen. RESULTS: No significant differences by auditory status emerged for response accuracy, response time to all trials, or response time to correct trials. Type of emotion significantly affected both accuracy and response time. CONCLUSION: Adolescents with CIs show similar accuracy and response time in recognizing static facial expressions compared to TH peers. Future studies should explore the association between visual emotion recognition and social well-being to determine the relationship between emotion recognition and overall quality of life in adolescents with CIs.

Patterns of structural lateralization in cortical language areas of older adolescents.

Structural lateralization of cortical language areas has been extensively studied in the past, with the conclusion that there is a predominant left lateralization in the majority of typically developing adolescents. However, lateralization in this age group has often been examined using cortical volumetric measures, without taking into account the independence of surface area and thickness. Utilizing structural MRI data in a relatively large sample size, the lateralization of cortical volume, surface area, and thickness was analysed across regions of interest (ROIs) known to support language processing in 118 typically developing adolescents, ages 13;9 to 18;9 using a laterality index. Results showed that the laterality index scores for volume and surface area were more strongly correlated than volume and thickness. Results also showed that not all language regions were left lateralized, with some ROIs being significantly right lateralized. Results also showed that surface area and thickness did not always share direction of lateralization. Taken together these results indicate that cortical ROIs supporting language are not all strongly left lateralized in adolescents. These data also show that cortical surface area and cortical thickness need to be treated independently in future studies characterizing language and lateralization in the adolescent brain.