Table 1.

Search in PubMed, PsychInfo, and Google Scholar.

PubMed	(risk[Title/Abstract] OR sibling *[Title/Abstract] OR likelihood[Title/Abstract] OR "broader autism phenotype"[Title/Abstract]) AND (ASD[Title/Abstract] OR autis *[Title/Abstract] OR asperger *[Title/Abstract] OR "pervasive develop*"[Title/Abstract]) AND ("Communicative Development Inventory"[Title/Abstract] OR CDI[Title/Abstract] OR "Mullen Scales of Early Learning"[Title/Abstract] OR MSEL[Title/Abstract] OR language[Title/Abstract] OR word*[Title/Abstract] OR vocabulary[Title/Abstract] OR communication[Title/Abstract]) AND month *[Title/Abstract]
PsycINFO	((risk OR sibling * OR likelihood OR "broader autism phenotype") AND (ASD OR autis * OR asperger* OR "pervasive develop *") AND ("Communicative Development Inventory" OR CDI OR "Mullen Scales of Early Learning" OR MSEL OR language OR word * OR vocabulary OR communication) AND month *).ti,ab,id
Google Scholar	(risk OR likelihood) AND (sibling OR siblings) AND (ASD OR autism OR asperger OR “pervasive developmental”) AND (“Communicative Development Inventory” OR “Mullen Scales of Early Learning”) AND (month OR months)