How to use psychological tests for functional diagnosis: the case of assessment of learning disabilities

Very often the diagnostic process provides only a descriptive label of the disorder. A useful diagnosis must reach the precise description and the functional interpretation of the deficits shown by a given individual. To this aim, four separate but intertwined steps are required: (1) clinical interview to collect personal and clinical anamnesis and to figure out the sociocultural context; (2) screening tests to describe the general cognitive picture and to detect the impaired functions; (3) standardized batteries to categorize the specific cognitive disorders according to the accredited taxonomies; (4) ad hoc investigation to identify the impaired cognitive components in the individual patient according to a sound theoretical model of the functional architecture of the cognitive processes. Only doing in this way, personalized educational and rehabilitative interventions may be planned and specific goals can be achieved.