An aptitude test is an evaluation that measures an individual's innate ability to excel in a specific area. Some synonyms for an aptitude test are a proficiency exam, a diagnostic assessment, a skill assessment, a capability test, a talent evaluation, and a potential appraisal. A proficiency exam measures an individual's proficiency in a given area. A diagnostic assessment evaluates an individual's specific strengths and weaknesses in a particular skill. A capability test assesses an individual's capability to learn a new skill or knowledge. A talent evaluation analyzes an individual's natural abilities to excel in a specific field, while a potential appraisal evaluates an individual's general ability to perform well in different areas. Whichever synonym is used, the purpose of an aptitude test is to assess an individual's potential and readiness to perform well in a particular field.