63 Comparison of Measures for Identification of Social Difficulties in Early Childhood for Children with Neurofibromatosis Type 1

Objective:Social functioning patterns vary across measures in children with neurofibromatosis type 1 (NF1; Glad et al., 2021) with broad psychosocial screening measures having shown no impairment (Klein-Tasman et al., 2014; Martin et al., 2012; Sangster et al., 2011) while a more specific social functioning measure indicated poorer social skills (Barton & North, 2004; Huijbregts & de Sonneville, 2011; Loitfelder et al., 2015). The current aims were to characterize caregiver-reported social skills using three different measures and determine which measure appears to best capture social difficulties for young children with NF1.Participants and Methods:Fifty children with NF1 (31 males; M=3.96, SD=1.05) and 20 unaffected siblings (11 males; M=4.34, SD=0.88) in early childhood (ages 3-6) were rated by a caregiver on one social functioning measure (the Social Skills scale on the Social Skills Rating System (SSRS)) and two broader functioning measures that include assessment of social functioning (the Social Skills scale on the Behavior Assessment System for Children-Second Edition (BASC-2), Social Interaction and Communication domain on the Scales of Independent Behavior-Revised (SIB-R)).Results:For children with NF1, the SSRS mean standard score was significantly lower than the BASC-2 and SIB-R (f=-5.11, p