ADI-R	Autism Diagnostic Interview-Revised
ADHD	Attention-Deficit/Hyperactivity Disorder
ADOS	Autism Diagnostic Observation Schedule
ANOVA	Analysis of Variance
AQ	Autism-Spectrum Quotient
ASD	Autism Spectrum Disorder
BAPQ	Broad Autism Phenotype Questionnaire
BD	Bipolar Disorder
BPRS	Brief Psychiatric Rating Scale
CHR-P	Clinical High Risk for Psychosis
CI	Confidence Interval
FEP	First Episode Psychosis
IQR	Interquartile Range
MDD	Major Depressive Disorder
OCD	Obsessive–Compulsive Disorder
OR	Odds Ratio
PANSS	Positive and Negative Syndrome Scale
PAUSS	PANSS Autism Severity Score
PCA	Principal Component Analysis
PERMANOVA	Permutational Multivariate Analysis of Variance
PSD	Psychotic Spectrum Disorder
RAADS-R	Ritvo Autism Asperger Diagnostic Scale-Revised
RRB	Restricted and Repetitive Behaviors
SD	Standard Deviation
SRS	Social Responsiveness Scale
VIF	Variance Inflation Factor