Purpose: The present study aimed to assess the psychiatric characteristics of children with chronic functional constipation using the Aberrant Behavior Checklist-Japanese version and the Pervasive Developmental Disorders/Autism Society Japan Rating Scale, and to examine the frequency of autism spectrum disorder in children with chronic functional…

Studies have proposed that individuals with autism spectrum disorder (ASD) can be divided into several subtypes depending on their sensory features. However, consideration of social communication features is also crucial for configuring ASD subtypes, because social and sensory features are tightly interrelated. In this study, we asked Japanese…

This study examined the similarities/differences between the social phenotypes of Williams syndrome (WS) and autism spectrum disorder (ASD). As cultural norms may affect symptom evaluation, this study administered the Social Responsiveness Scale-2 to Japanese individuals with WS (n = 78, 4.4-44.0 years) and ASD (n = 75, 4.7-55.4 years). The scores…

Objective: Parents of children with attention deficit hyperactivity disorder (ADHD) experience elevated levels of stress in their parenting role. Understanding what contributes to such stress is important for its management. Methods: We assessed associations between child and parent characteristics and parenting stress in Japanese mothers of…

Objective: Developmental disorders, such as attention deficit hyperactivity disorder (ADHD) and autism spectrum disorder (ASD), are some of the biggest contributors to mental health problems. However, it is not well known whether and how experiencing ADHD- or ASD-related symptoms can cause mental illness later in life. Participants: The sample…

In Japan, many high school students have severe depression. Preventive interventions for school-based cognitive-behavioral depression are effective countermeasures against depressive problems among high school students. However, since high school curriculums are time-consuming, such interventions are less common among high school students.…

Based on the "Differential Susceptibility Theory," we examined whether the relationship between pubertal maturation and depressive symptoms can be moderated by individual differences in environmental sensitivity. The current article used the three-wave data collected from Japanese adolescents aged from 12 to 15 years (girls = 111,…

The present study investigated how life stressors and sleep disturbances interactively affect depressive symptoms among university students. Based on a hypothesis that sleep disturbance can be a cause of depression, a statistical model is established which expects that life stressors impact depressive symptoms indirectly rather than directly by…

Background: The 22q11.2 deletion syndrome (22q11DS) is characterised by a changing pattern of overlapping intellectual, physical, and mental disabilities along the course of one's life. However, the impact of overlapping disorders (multimorbidity) on educational challenges remains unclear. Method: A survey was conducted with 88 caregivers of…

In the present study, we employed network analysis that conceptualizes internet addiction (IA) as a complex network of mutually influencing symptoms in 108 adolescents with autism spectrum disorder (ASD) to examine the network architecture of IA symptoms and identify central/influential symptoms. Our analysis revealed that defensive and secretive…

A weaker McGurk effect is observed in individuals with autism spectrum disorder (ASD); weaker integration is considered to be the key to understanding how low-order atypical processing leads to their maladaptive social behaviors. However, the mechanism for this weaker McGurk effect has not been fully understood. Here, we investigated (1) whether…

Small studies in Western populations report a high prevalence of obstructive sleep apnea (OSA) in adults with Down syndrome. To date, ethnic differences have not been explored. A questionnaire sent to 2,752 adults with Down syndrome aged 16 years in Scotland and Japan (789 valid responses) estimated OSA prevalence based on reported symptoms.…

The use of mindfulness as a tool to improve mental health has received increased attention. Schools provide ideal environments for short-term prevention and skill development for mental health. Further, teachers can promote and reinforce students' daily use of mindfulness. This study explored the effects of a short-term group mindfulness-based…

The present study examined the relationship between multisensory integration and the temporal binding window (TBW) for multisensory processing in adults with Autism spectrum disorder (ASD). The ASD group was less likely than the typically developing group to perceive an illusory flash induced by multisensory integration during a sound-induced…

Objectives: Motor deficits related to imitation have been observed in autism spectrum disorder (ASD) patients. This pilot investigation focused on motor performances, including daily tool-use actions, performing an action in the absence of the tool, and imitating (copying tool-use action presented visually), in eight children with ASD and eight…