Skills therefore seem to be the vital elements through which an individual learns, communicates, understands, applies, uses and manipulates instruments, searches, gathers, discriminates, learns to learn, negotiates, forms relations, plans, or manages proactively.
L'aptitude semble donc être l'élément essentiel grâce auquel l'individu apprend, communique, comprend, applique, utilise et manie des instruments, cherche, collecte, discerne, apprend à apprendre, négocie, entre en relation, projette, gère pro-activement.