There are many type questionnaires that are presented as the MBTI instrument or just like the MBTI instrument. If an instrument is not published by The Myers-Briggs Company, and is not called the MBTI instrument, then it may be not validated by the same extensive research.
Although many professional are eligible to purchase and administer the assessment through graduate study of tests and measurements, a recognized MBTI® Qualifying or MBTI® Certification Program trains the professional specifically on using the MBTI instrument.
The referral network is made up of professionals who have achieved the highest level of experience and expertise set forth by the MBTI® Master Practitioner Credential Program.
The Association for Psychological Type International is a membership organization with specific type interest area groups and local chapters. The organization produces a newsletter and sponsors conferences and workshops. Of course, a practitioner may not be a member, but he or she should at least be aware of the organization.
The steps should include (a) explaining the origins of type theory and what it can and cannot do,(b) emphasizing the value of all types and the confidentiality of results,(c) explaining the preferences,(d) having respondents self-assess which preferences are most like them, and, (e) introducing the idea of whole type as more than the sum of its parts.
A good practitioner presents type as a working hypothesis, a starting point for further exploration. Only the respondent can verify which type fits best. If self-assessment and Indicator results do not agree, the practitioner should take time to explore these differences with the respondent to arrive at a best-fit type with which the respondent feels comfortable.
Participants should receive, at the very minimum, materials describing all sixteen types so they can explore other types if necessary to find their best fit. Participants can also see the wide range of types and begin to use this knowledge in relating to others.While some practitioners may create their own handouts, materials distributed should be originals obtained from the appropriate source and respectful of copyrights. (If the assessment toll being used is not the MBTI instrument, materials designed for the MBTI instrument may not be appropriate and may give inaccurate information.)