Previous studies indicate that Multiple Complex Developmental Disorder (MCDD) children differ from PDD-NOS and autistic children on a symptom level and on psychophysiological functioning. Children with MCDD (n = 21) and PDD-NOS (n = 62) were compared on two facets of social-cognitive functioning: identification of neutral faces and facial expressions. Few significant group differences emerged. Children with PDD-NOS demonstrated a more attention-demanding strategy of face processing, and processed neutral faces more similarly to complex patterns whereas children with MCDD showed an advantage for face recognition compared to complex patterns. Results further suggested that any disadvantage in face recognition was related more to the autistic features of the PDD-NOS group rather than characteristics specific to MCDD. No significant group differences emerged for identifying facial expressions.

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Keywords Emotion recognition, Face recognition, Facial expression recognition, MCDD, PDD-NOS, Pervasive developmental disorders
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Herba, C.M., de Bruin, E.I., Althaus, M., Verheij, F., & Ferdinand, R.F.. (2008). Face and emotion recognition in MCDD versus PDD-NOS. Journal of Autism and Developmental Disorders, 38(4), 706–718. doi:10.1007/s10803-007-0438-5