



Values, attitudes, and behaviors of different people. We should be able to use MBTI type to understand and predict people'sīehavior to some degree. (or rather, if it reflects the real world with accuracy), then Why is this important? If personality type is real That the instrument measures has meaning. Intends to measure, and the degree to which the thing Validity is the degree to which an instrument measures what it When the MBTI instrument is used with groups where reported reliabilities are lower or data are lacking, caution should be exercised and the professional should evaluate appropriate use.The reliabilities are quite good across most age and ethnic.Of the dichotomous pairs (e.g., E-I or S-N), and in a dichotomy When a person changes type on retest, it is usually on one.On retest, people come out with three to four type preferences.Reliability (when scores are treated as continuous scores,Īs in most other psychological instruments) is as good as orīetter than other personality instruments.Facts about the MBTI ® instrument reliability: The MBTI ® instrument meets and exceeds the standards for psychological instruments in terms of its reliability. But there are generally accepted standards for psychological instruments. Personality is qualitative and therefore difficult to measure, so psychological instruments cannot have the same consistency you would expect from, say, a ruler.

(This is called test-retest reliability, and it is an important measure of any kind of scientific testing.) Why is consistency important? Because when you measure something with an instrument two times, you want it to come out with the same answer (or close to it) both times. What is reliability? Reliability is how consistently a test measures what it attempts to measure.
