*2.3. Outcome Measures*

The survey consisted of several sections. The first part consisted of a structured interview on the socio-demographic data (gender, age, education, schooling, city of birth, profession) of both the caregiver and child/student who used DL. The second part presented a series of psychological scales for assessing the psychological impact of DL on parents.

The psychological battery included:



The third part included tests that children and adolescents had to fill in via selfassessment with parental support:



Finally, both groups were administered the System Usability Scale (SUS) to evaluate the usability of DL. The system usability scale (SUS) is a Likert scale with ten items that provides a global view of subjective usability assessments. SUS requires only one evaluation at the end of the treatment; scores above 50.0 indicate good usability of the device [25].
