# WPPSI-IV calculation from subscores (Wechsler IQ)

**URL:** <https://boards.straightdope.com/t/wppsi-iv-calculation-from-subscores-wechsler-iq/752544>\
**Category:** Factual Questions\
**Created:** [April 18, 2016, 8:53am UTC](https://boards.straightdope.com/t/wppsi-iv-calculation-from-subscores-wechsler-iq/752544 "2016-04-18T08:53:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Melbourne](https://avatars.discourse-cdn.com/v4/letter/m/b5e925/32.png) [@Melbourne](https://boards.straightdope.com/u/Melbourne)\
**Post date:** [April 18, 2016, 8:53am UTC](https://boards.straightdope.com/t/wppsi-iv-calculation-from-subscores-wechsler-iq/752544/1 "2016-04-18T08:53:08Z")

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Wechsler is an “IQ test”. Does anyone here know… given the following set of sub-test scores, how is the total (“Full Scale”) score calculated:

VCI = 103 (96-110)  
VSI = 82 (y5-93)  
FRI = 89 (83-96)  
WMI = 112 (103-119)  
PSI = 100 (90-110)

I know that averages / deviations sometimes give non-intuitive results, but the FSI range I’m looking at might be a calculation error, so I’m curious.

{VC = Verbal Comprehension, VS = Visual Spatial, FR= Fluid Reasoning, WM = Working Memory, PS=Processing Speed. WPPSI=Wechsler Preschool and Primary Scale of Intelligence)

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**Author:** ![Wendell\_Wagner](https://avatars.discourse-cdn.com/v4/letter/w/8491ac/32.png) [@Wendell\_Wagner](https://boards.straightdope.com/u/Wendell_Wagner)\
**Post date:** [April 18, 2016, 9:18am UTC](https://boards.straightdope.com/t/wppsi-iv-calculation-from-subscores-wechsler-iq/752544/2 "2016-04-18T09:18:36Z")

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I’m going to presume that you mean that the sub-test scores are as follows:

The Verbal Comprehension score is 103 (which, allowing for error, means that it is in the range 96-110).  
The Visual Spatial score is 82 (which, allowing for error, means that it is in the range 75-93).  
The Fluid Reasoning score is 89 (which, allowing for error, means that it is in the range 83-96).  
The Working Memory score is 112 (which, allowing for error, means that it is in the range 103-119).  
The Processing Speed score is 100 (which, allowing for error, means that it is in the range 90-110).

I have no idea how these scores are combined to calculate the overall score, but if it was simply averaging them, it would mean an overall score of about 97.