“…According to such a philosophical perspective, the tripartite ICF concept of disability does not seem to make sense and might be due to a confusion of the conceptual issue of defining disability and methodological issues related to the need to specify environmental factors with respect to estimations of ability. However, the language of the ICF classification part is somewhat less complicated to use because activities and participation are described in a common list and researchers may focus on the participation aspect [13,14,20]. Participation refers to functioning in the actual environment of the studied persons in contrast to the ICF concept of activities, which refer to a so-called standard environment or assumptions about such an environment [14].…”