“…The CHECK is a one-page questionnaire designed for use by parents to provide information about their children's ability to function within the context of their natural environments during the previous three months. The questionnaire was developed based on a number of resources that established the tool's content validity: (a) the DSM-5 definitions of SLD, ADHD, and DCD [1], (b) the ICF framework, which served as the basis for understanding interactions between components that reflect functioning [30], (c) Barkley's hybrid model of executive functions [27], (d) the current literature about daily functional challenges of children with these conditions, (e) previously designed screening questionnaires (e.g., [49, 50]), and (f) analysis of interviews with parents of children and adults with SLD, ADHD, and DCD about their children's daily functioning experiences, confrontations, and challenges (e.g., [17, 51–54]). Initially, based on these resources and the researchers' extensive clinical experience, including observations on young children, 48 statements were formulated by the first author to reflect daily routine functions that challenge children aged 3 to 6 years with suspected invisible disabilities because of the need for executive function involvement in their performance (i.e., ADL, communication, inhibition and self-regulation, and organization in space and time).…”