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. 2017 May 16;23(5):1205–1212. doi: 10.1038/mp.2017.98

Figure 1.

Figure 1

Validation of the novel questionnaire of autistic traits in adults. (a) Distributions of the total scores on the 18-item self-report questionnaire (Q18 score) of autistic traits in a Dutch general population sample of 50 adults* (General population (GP) participants, red line; total score range: 25–46; mean total score: 33 (s.d.=5.4)) and in 24 adults with a confirmed autism spectrum disorder (ASD) diagnosis (ASD participants, blue line; total score range: 37–66; mean total score: 50 (s.d.=7.5)). ASD participants scored significantly higher than the GP participants (P<0.001; two-sided T-test). (b) Correlation between Q18 score of autistic traits (total score range: 25–46; mean total score: 33 (s.d.=5.4)) and the total scores on the 50-item AQ (Q50 score; total score range: 78–123; mean total score: 98 (s.d.=10.2)) in a Dutch GP sample of 50 adults*. Each dot represents one participant. A significant correlation (correlation coefficient R=0.703; P<0.001) was observed between the total autistic traits score on our 18-item questionnaire and the total AQ score. *These are the same 50 respondents.