All children and their parents enrolled in the study will undergo an assessment of intellectual functioning, and a direct evaluation of motor skills using the Movement Assessment Battery for Children - Thirs Edition (MABC-3). Motor skills will also be assessed indirectly through either a parent or self-completed questionnaire. The motor profile of the participants will be further characterized using kinematic analysis of upper-limb movements during two experimental tasks.

Clinical evaluation of participants by means of Autism Diagnostic Observation Schedule, Social Responsiveness Scale

The Movement ABC-3 (Movement Assessment Battery for Children, Third Edition) is a comprehensive, standardized assessment tool for identifying gross and fine motor coordination difficulties in individuals aged 3 to 25, assessing skills like dexterity, aiming, catching, balance, and locomotion.

The Developmental Coordination Disorder Questionnaire (DCDQ) is a parent questionnaire originally developed for estimating gross and fine motor skill difficulties in children. The questionnaire consists of 15 items investigating different subdomains of motor abilities, such as ball skills, complex motor coordination, fine and general motor skills. For each item, parents rate the children's degree of motor coordination on a 5-point scale comparing it to same-age peers.

The Adult Developmental Coordination Disorder/Dyspraxia Checklist (ADC) is a self-report screening tool for adults (16+) to identify potential Developmental Coordination Disorder (DCD/Dyspraxia) by assessing lifelong motor challenges in daily activities

(a) a reaching-and-inserting task involving a ball (ball task), which consists in reaching and grasping a rubber ball (diameter: 6 cm) placed over a support and dropping it in a small basket, provided with a hole large enough (diameter: 7 cm) not to require fine movements; (b) a task requiring grasping a moving ball (ball-rolling task) which requires participants to catch a ball rolling toward them on a curvilinear path off an inclined tabletop. As outcome measure, we will consider the total movement duration (recorded in sec).

Magnetic Resonance (MRI) of the Brain - MRI signal allowing tridimensional multiplanar reconstruction of the brain's structures. Anatomical images obtained with high definition T1 weighted sequences of radio frequencies - the measure is a "signal (in Hz) to noise ratio" which is obtained from each voxel (tiny 3D portions of the brain)