administration of the test takes about 35–50 minutes for the paper-and-pencil version and about 30 minutes by computer. the test instructions are simple and straightforward and the test is un-timed; thus, the test is generally self-administrable and can be used in either an individual or a group setting. the 16pf test was designed for adults at least age 16 and older, but there are also parallel tests for various younger age ranges (e.g., the 16pf adolescent personality questionnaire).