Study design
A randomized controlled trial was designed [The sample size was computed according to previous multicenter controlled studies [The participants assessed as eligible for the study were consecutively enrolled and then randomly allocated to one of the two interventions (ratio 1:1): the ABILITY approach (experimental group) or the TAU (active comparator group).An independent operator conducted randomization, neither involved in the assessment nor treatment using a computer algorithm (CONSORT diagram of the study.Since participants could not be blinded to their treatment allocation, they were instructed not to discuss the nature of their intervention with the researchers in charge of the assessments. Outcome measures were collected by a neuropsychologist blinded to group allocation.