Open Access. The accepted version of this work has been reproduced here according to the publisher's policies.
This is the author’s version of a work that was accepted for publication in Journal of Autism and Developmental Disorders. Changes resulting from the publishing process, such as copy-editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version of this work was published by Springer, this version can be found at http://dx.doi.org/10.1007/s10803-019-03892-7 (Please note: access via this link may only be available with a subscription).
Copyright (2019) Springer
Journal of Autism and Developmental Disorders, 49(6): 2231 - 2242