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Why Does the Personality Instrument Matter?
Mark S. Majors, Ph.D.
A type result serves your client to the degree that the instrument behind the result matches the type your client confirms as their best fit. Mark Majors, the counseling psychologist who developed the Core Factors Type Discovery assessment, explains the standards for judging a type instrument and how to present a type assessment to clients as a tool for self-understanding.
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What you take away
Three Problems This Special Report Helps You Solve
Plain Language That Explains the Purpose of a Type Assessment
Some clients expect a type assessment to grade their ability or their worth. Majors explains why a type assessment is a tool for self-understanding and personal growth, and how it differs from a test that rates skill. He recommends stating that purpose at the start of a session, before any results are shared.
A Clear Answer When Someone Asks About Accuracy
Majors explains reliability, validity, and best-fit accuracy, and why best-fit studies are the method he uses to judge whether a type instrument is accurate. He also describes construct drift, which occurs when developers move away from the theory as they revise an instrument. You can apply these standards to any type instrument you consider for your practice.
Guidance for Clients Whose Preference Is Unclear
Many clients say they use both sides of most dichotomies. Majors explains how to frame a score so the client reads it as a preference for one side, rather than an amount of that side. He also explains how Type Discovery handles neutral responses and adds five questions when a result falls near the midpoint.
Inside the special report
Twenty-One Pages from the Developer of Type Discovery
01
Why Is Instrumentation Important?
02
Consistency and Standardization
03
Measurement Reliability as an Anchor for Consistency and Standardization
04
Validity or the Consistency and Standardization of Meaning and Language
05
What Does an Instrument Do?
06
The Proper Use of an Assessment of Personality Typology
07
Frequently Asked Questions
08
Appendix: The Core Factors Type Discovery History and Psychometrics
09
The Core Factors/Jungian 8-Process Scores
The evidence
Built and Tested Against Confirmed Best-Fit Types
Best-fit research is the standard Majors applies to every type instrument: the result is compared with the type the person confirms as their best fit. Type Discovery was built to that standard. Every item had to agree with the confirmed best-fit types of people who knew their type before the item could stay in the assessment. The finished assessment was then checked again against best-fit types that professionals confirmed with their clients.
Why best-fit matters
Internal consistency shows that the items on a scale agree with one another, and best-fit research shows whether the result matches the person. Majors treats best-fit research as the deciding test, because the person who completes the assessment is the best judge of whether the result fits.
About Mark S. Majors, Ph.D.
Mark S. Majors, Ph.D., is a counseling psychologist who worked with Consulting Psychologists Press from 1992 to 2001 as a contractor and as an in-house research scientist. He did the data analysis for the MBTI® Form M revision and the 1994 Strong Interest Inventory, developed the IRT scoring for the MBTI Form Q, co-authored the MBTI Form Q Manual, and led the psychometric and scoring development of the Strong Interest Explorer. He is the principal developer of the Core Factors Type Discovery, Type Elements, Type Dynamics, Career Path, Career Signals, and Social Dynamics assessments. He holds a Ph.D. in Counseling Psychology and Multicultural Studies from the University of Nebraska-Lincoln.
This special report draws on the development research behind Type Discovery and on 25 years of counseling individuals and couples through personality differences.
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