The APEST is in the validation process. Next in the process is deeper exploration and test-retest reliability. You can watch this space for updates.
There are four factors at play in this question. Read below to find out more of where APEST and mPULSE coming from.
VALIDITY
...refers to whether an assessment gives an accurate indication of
what it is actually designed to measure. APEST/mPULSE identify how a person
is currently functioning in their present ministry setting. The validity of
APEST/mPULSE is indicated in the accurate measure of subject matter
understanding and individual predictability for influence.
RELIABILITY
...relates to the consistency of an assessment to provide accurate
measures over time. As an assessment, APEST and mPULSE reliability provides a
consistent, immediate measure. Over time, an organic system will change
to meet the demands of mission.
CORRELATION
An assessment cannot have a high validity without high reliability -
the two need to correlate. Correlation refers to how these two factors
are inter-related to determine organization change. As validity
indicates a present state, reliability refers to the present state
remaining constant over time. The correlation between the two is
determined by an organizations ability to maintain proper levels of
engagement between the members of a ministry team. Correlation in
principle and practice, in validity and reliability, is the constant
pressure of measurement. Applicability of APEST - whether it can
actually influence individual and organizational effectiveness - is
also correlated to an organization's ability to create an environment
ready for individual engagement in a common cause 0 mPULSE.
APEST/mPULSE and Environmental Fit
The validity and reliability of an assessment are ultimately
predicated on ‘Environmental Fit.’ Environmental Fit refers to the
inter-relationship between three factors: person, place and timing -
the right person, the right person in the right place and the right
person in the right place at the right time. An individual who knows
his or her APEST profile is effective when supported by the three
elements of Environmental Fit. A group who is striving to become more aware of a particular element of their mDNA in mPULSE, will also be effective when lived out in that environment.