Aptitude is an ability, tendency, or capacity in a specific area or discipline, inherited or acquired as the result of environment and life experiences, and is usually measurable with aptitude tests. Aptitudes can be used to predict how likely a person is to succeed in certain environments.
Business Dictionary.com, “Aptitude.” Online: http://www.businessdictionary.com/definition/aptitude.html (Retrieved on August 13, 2014)
Landine, Jeffrey and John Stewart, “Assessment in Career Guidance.” In Blythe C. Shepard and Priya S. Mani (editors). Career Development Practice in Canada: Perspectives, Principles and Professionalism. Toronto: Canadian Education and Research Institute for Counselling (CERIC), 2014, p.434.