Fig. 1
a Exploratory Structural Equation Modeling Social Responsiveness Scale correlated 3-factor RRB solution. Solid lines represent factor loadings, and curved lines represent the correlation among factors. Note: CI: Circumscribed Interests; IS: Insistence on Sameness; RMB: Repetitive Motor Behaviors. Item 4 (Shows rigid pattern of behaviors when under stress), item 20 (Unusual sensory interests), item 24 (Difficulties with changes in routine), item 28 (talks about the same thing or topic), item 31 (cannot get his mind of something), item 39 (Unusually narrow range of interests), item 50 (Repetitive motor behaviors such as hand flapping), item 61 (Inflexible), b Exploratory Structural Equation Modeling Social Communication Questionnaire correlated 3-factor RRB solution. Solid lines represent factor loadings, and curved lines represent the correlation among factors. Note: IS: insistence on sameness; RMB: repetitive motor behaviors; UI: unusual interests. Item 7 (Says the same thing/insists that others say the same thing over and over), item 8 (Has to do things in a very particular order), item 11 (Interests odd in terms of content [e. g., traffic lights, timetables]), item 12 (Interest in parts of objects [e. g., spinning wheels]), item 13 (interests unusual in intensity but not content/topic), item 14 (unusually interested in sensory stimuli), item 15 (Motor mannerisms/stereotypies [e.g., hand flapping, finger movements]), item 16 (Complex body movements [e.g., spinning, bouncing up and down]), item 18 (Objects to carry around). c Exploratory Structural Equation Modeling Autism Diagnostic Interview-Revised correlated 3-factor RRB solution. Solid lines represent factor loadings, and curved lines represent the correlation among factors. Note: IS: insistence on sameness; RMB: repetitive motor behaviors; UI: unusual interests. Item 39 (Verbal rituals), item 68 (Circumscribed interests), item 69 (Repetitive use of/interest in parts of objects), item 70 (Compulsions/rituals), item 71 (Unusual sensory interests), item 74 (Difficulties with minor changes in one’s own routines/environment), item 75 (Resistance to changes in the environment not directly affecting the individual), item 76 (unusual attachment to objects), item 77 (Hand and finger mannerisms), item 78 (Complex mannerisms or body movements), item 79 (Midline hand movements)