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Background: Head circumference (and its related morphologic factors such as head length and width) is one of the morphologic indices that people with autism spectrum disorders (ASD) have different developmental patterns in comparison to their peers. So the aim of this study is to assess head circumference indices in relation to cognitive factors in ASD children and adolescents.

Materials and Methods: In this cross-sectional study, the case group was consisted of 129 students with ASD aged 7-18 years old. The control group was consisted of 103 students with intellectual disability (ID) aged 7-18 years old. Head circumference, head length and width was measured by meter and caliper respectively. In addition, socio- cognitive factors questionnaire was responded by parents.

Results: Results showed that the head circumference, length and width of ASD group was significantly greater than ID group (p<0.001). Moreover, ASD group achieved lower score on SSIS questionnaire than ID group (p<0.001). Furthermore, results showed that in ASD group with increasing the size of head circumference the score on socio-cognitive abilites and skills decreased (p<0.05).

Conclusion: Generally, this study indicated that the developmental trajectory as well as the relation of anthropmetric indices of head circumference and socio-cognitive factors in children and adolescents with ASDs is different from ID population.

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Introduction: Investigating the psychological issues of patients with diabetes, especially in adolescence and youth, is particularly important. Therefore, this study aims to compare the health anxiety and response inhibition of people with type 1 diabetes with healthy people.
Methods: This research is a description of the causal and comparative types. Its statistical population consists of all boys and girls aged 14 to 24 years old with type 1 diabetes in Arak city who were referred to the treatment clinics of this city in 1400. From this population, 30 people were selected by purposive sampling, and 34 healthy teenagers participated in this study as a comparison group. The tools of this research included the health anxiety questionnaire (Salkoskis and Warwick, 2002) and the open-ended task, and multivariate analysis of variance was used to analyze the data.
Ethical Considerations: The present research has been registered with the code IR.ARAKU.REC.1401.015 in the Ethics Committee of Arak University.
Results: The present study's findings showed a significant difference between health anxiety and cognitive inhibition of adolescents with type 1 diabetes and healthy adolescents (P<0.05).
Conclusions: The results of this research show the higher level of health anxiety and poor performance of adolescents with type 1 diabetes in choosing the right answer and neglect the wrong answer, which indicates a weakness in their inhibition system. Considering the placement of these problems along with the psychological characteristics of adolescence, it is suggested to use suitable psychological treatment approaches and suitable cognitive rehabilitation interventions to solve or reduce these problems and increase the health of these patients.