The WISC-V Scores
By Inderbir Kaur Sandhu, Ph.D
Hello, I am thrilled to find this wealth of information. This site is
going into my bookmarks. :) 2 questions:
1. My 10 year old took the WISC V and several other tests. We received
the scores and they are puzzling. WISC V is "scaled scores" (Mean=10, SD=3).
I don't know what that means. His scores:
All the rest of the scores range from 15-19 on this test.
I am confused because I am used to seeing them in a this form. For
example: 90 is average; 140 is highly intelligent etc. Also seeing them
in "percentile" form and/or "grade level." Can you help me figure this
2. I read somewhere that the WISC IV and WISC V are different in that
the IQ scores received could be a bit lower on the V. The Standard
Difference could be off a bit. I am only concerned with that because
places Mensa or Davidson ask for a certain score and it is the same on
both versions of WISC.
I hope this makes sense. Thank you for your time.
There has to be a lot more in the report rather than the scaled scores.
In any report, the FSIQ should be described followed by the Primary
Index Scores (VCI – VSI – FRI – WMI – PSI). The full scale IQ comprises
of Similarities (SI), Vocabulary (VC), Block Design (BD), Matrix
Reasoning (MR), Figure Weights (FW), Digit Span (DS), and Coding (CD).
Scores are first scaled and the scaled scores are then converted to
index scores. Index scores are summed and divided by 5 (for the 5
Primary Index Score) to derive a Mean Index Score (MIS). Based on the
MIS, the 5 scores are compared and differences noted. The difference, if
found to be significant, would be indicated as a strength or a weakness.
There should be a lot more than the scaled scores in the report to
interpret the scores. However, based on the mean and SD, your child
appeared to have scored in the very high range. It is noted that in the
WISC-V, the FSIQ is generally downplayed in the manual and the ratio of
verbal tests to visually based is slightly lower but overall all
functioning is quite similar to WISC-IV. I would suggest that you speak
to someone at the test centre or school for a full report as it is hard
to make sense of the scores with so little information.
If anything, the WISC-V is an upgraded and revised version of the WISC-IV
and is able to capture intellectual abilities of a child. WISC-V is very
new and there aren't many reviews as yet; therefore it is best to speak
to someone at MENSA if you feel that scores differ on both tests. By
right, it should be similar and just a few points higher or lower. Being
a new test, I am sure there are considerations as to what scores are
acceptable for admissions.
Hope that helps a little. All the best!