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- How do I convert 8 individual scores to 4 overall preference
- I took the test years ago and don't remember the results... ?
- The results from the instrument don't indicate my "true
- How do I
convert typical MBTIŽ instrument scores into continuous scores, for use in the Creativity Index and the Rainmaker Index?
I only have the scores for all of my 8 individual
preferences from the MBTIŽ instrument, but not an overall set of 4 numerical scores. How do I convert
them to four overall preference scores?
Your MBTIŽ instrument facilitator should have provided you with the
four overall scores. You could ask them to do so, or calculate them yourself.
Example: Suppose your individual
scores were as follows:
E=22, I=2 (This is Extroversion-Introversion preference scale)
S=24, N=10 (This is the Sensory-iNtuitive preference scale)
T=8, F=15 (This is the Thinking-Feeling Preference scale)
J=20, P=8 (This is the Judging-Perceiving preference scale)
Convert these scores to an overall preference for each of the four scales
a. Subtract the smaller score from the larger score, and multiply by 2.
b. If the larger score is the first of each of the pairs above, subtract 1 point.
If the larger score is the second of each of the pairs above, add 1 point.
(Ref 1, 2)
Example using the numbers above:
E minus I=22-2=20. 20x2=40. 40-1=39. Overall preference and score:
S minus N=24-10=14. 14x2=28. 28-1=27. Overall preference and score: "S27"
F minus T=15-8=7. 7x2=14. 14+1=15. Overall preference and score: "F15"
J minus P=20-8=12. 12x2=24. 24-1=23. Overall preference and score: "J23"
Hence, this individual would have a preference of: E39; S27; F15; J23.
These are the scores that are used to calculate the Creativity Index.
I took the MBTIŽ instrument years ago, and do not remember where the results are, but do
remember my overall preferences and their approximate strengths. Can I use these results
to estimate my Creativity Index?
You really should retake the instrument, and get numerical
However, if it is impractical to do this, you can estimate your
preference scores. The possible range for each of the overall preference scores is shown
below. From these, you can "guesstimate" approximate numerical values for the
E: Extroversion range of preferences = 1 to 51
I: Introversion range of preferences = 1 to 57
S: Sensory range of preferences = 1 to 67
N: iNtutition range of preferences = 1 to 51
T: Thinking range of preferences = 1 to 65 for males & females
F: Feeling range of preferences = 1 to 39 for males, 1 to 43 for females
J: Judging range of preferences = 1 to 55
P: Perceiving range of preferences = 1 to 61
Example: say you recall that most
of your preferences were ESFJ, and that they were all reasonably definite, but not
extremely so, except that E was close to I. You might then estimate that your
preferences and numbers are very roughly:
E 10; S 30; T 30 and J 27.
These numbers can be used to estimate your Creativity Index,
but it is better to have taken the MBTIŽ instrument directly.
The results from the instrument did not provide my "true type", which
I realized after some discussion with a trained MBTIŽ instrument facilitator. For example, the
instrument indicated that I was an INTP, but after discussing it and reading
several of the 16 MBTIŽ instrument type descriptions, I decided I am really an INFP. What
should I do in using the scores from the instrument to estimate my Creativity Index?
This is a relatively common occurrence. What we recommend is that you use the numerical
scores for the scales that you are confident of, and use an estimation for the one (or
more) scores where your "true type" is different from the indicated by the
Example: Say that you are confident of the
preference scores from the instrument for I, N and P. Use these preference scores directly
in the calculation of the Creativity Index.
However, you believe that "F" fits you better that "T". Depending
on how strong you think this preference really is, choose a numerical score for
"F", as described in question #2 above. If it is a relatively weak preference,
choose a low number (1-10). Typically this kind of switch happens where a preference is
not particularly strong. Perhaps the score for "T" was only 5. It might then be
appropriate to use a relatively low score for "F" of around 5. Both of these
scores are close to the "middle."
Note that only the individual can estimate what this score should be, and it is possible
to have a very strong "true-type preference" that is opposite of what the
Note: If you have not taken the
instrument, you can arrange to do so through a qualified MBTIŽ instrument administrator. Greg Stevens at WinOvations, Inc. is a one such
How do I convert typical MBTIŽ instrument
scores into continuous scores, for use in the Creativity Index, and the Rainmaker
Note: You can use our Calculator
page to automatically do the following calculations.
In the following example, the person is supplied only with the raw MBTIŽ Form G subscores
for each of the 4 indices measured by MBTIŽ Form G, as follows:
Most people will not need to do this first step. Your
MBTIŽ instrument facilitator really should have provided you with an overall score for each of the
four axes. Most do. However, in this example it was not done, so we need to first
calculate the overall MBTIŽ instrument scores.
The overall MBTIŽ instrument scores are calculated by subtracting the smaller score from the
larger one, multiplying by two, and then either adding or subtracting one. You subtract
"1" if the larger of the two are E, S, T or J. You add "1" to the
score if the larger is I, N, F or P. For example, the overall MBTIŽ
instrument scores for each of the
four axes are shown below. This is the format that MBTIŽ instrument scores are supposed to be reported
I-37 (Example calculation: I21-E3 = 18, 18 x 2 = 36, 36 + 1 = 37)
N-39 (Example calculation: N24-S5 = 19, 19 x 2 = 38, 38 + 1 = 39)
T-33 (Example calculation: T23-F6 = 17, 17 x 2 = 34, 34 - 1 = 33)
P-31 (Example calculation: P21-J6 = 15, 15 x 2 = 30, 30 + 1 = 31)
The next step is to calculate MBTIŽ instrument continuous scores. The scores typically
reported directly above have zero as the midpoint for each of the four scales. In other
words, for the S to N (Sensory to iNtuitive) scale there is a continuum going from S to N,
with zero in the midpoint.
To use statistics with the MBTIŽ instrument scores (to see correlations between the strength of the
MBTIŽ instrument preference on individual performance), we need to first convert these scores to
continuous scores with 100 at the midpoints, instead of zero. Continuous
MBTIŽ instrument scores are
not normally reported to participants, so everyone interested in calculating their
Creativity Index or their Rainmaker Index has to first convert their overall
scores to Continuous MBTIŽ instrument scores. Continuous MBTIŽ instrument scores are calculated from the overall
MBTIŽ instrument scores as follows:
For overall preferences of E, S, T or J we subtract the overall MBTIŽ
instrument score from 100.
For overall preferences of I, N, F or P we add the overall score to 100.
Example: Using the above overall MBTIŽ instrument preference scores for INTP, calculate the
continuous MBTIŽ instrument scores, which are subsequently used to calculate the Creativity
Index, and the Rainmaker Index:
EI continuous score = 137 (100 + I score of 37)
SN continuous score = 139 (100 + N score of 39)
TF continuous score = 67 (100 - T score of 33)
JP continuous score = 131 (100 + P score of 31)
The Creativity Index uses the above continuous scores. The formula for the CI
is as follows:
CI = 3 x (SN) + (JP) - (EI) -
0.5 x (TF) (Ref 3)
Example: using the same INTP participant
CI = 3 x (139) + (131) - (137) - 0.5 x (67)
= 417 + 131 - 137 - 33.5
= 377.5 This is a relatively high Creativity Index
The range of scores possible with the Creativity Index is from negative 84.5 to
positive 547.5. The mean CI in the very large CAPT database is 235. The mean in our
study of 69 business analysts was 285, and the median was 273. Harrison Gough, who
developed the CI, found that CIs above 350 correlate with people who are
highly creative in many different fields. We have found that analysts in the top third of
the CI out-earn those in the bottom third by a factor of 11 times.
The Rainmaker Index, which correlates with profits that result from the "fuzzy
front end" of new product development (provided that the analysts are first trained
and extensively coached in the WinOvations system of new business development), is also
calculated from MBTIŽ instrument continuous scores.
The formula for the Rainmaker Index from our paper is as follows:
Rainmaker Index = (SN) - (TF)
Rainmaker Index = 139 - 67
= 72 (This is quite high.)
The possible range for the Rainmaker Index is from negative
110 to positive 116. The
mean in the sample we studied was 27.8, and the median was 25. We have found that
Rainmaker Indexs above 46 are quite high. Analysts with Rainmaker Indexes above 46
(i.e. in the top third of the group) identified the great majority of profits, outearning
those with Rainmaker Indices in the bottom third by a factor of 95 times.