<p>The Raven's 2 Clinical Edition developed by Pearson features an item bank comprised of questions numbering in the hundreds.</p>
<p>Because of this each test differs from the other with possible combinations of different questions numbering in the millions. This was developed for test security in as well as practice effect mitigation. A friend of mine has taken this test a multitude of times resulting in variable scores with a large spread. He knows he's not supposed to.</p>
<p>The scores of a three month long period are as follows.</p>
<p><code>144, 133, 130, 150, 140, 140, 141, 130, 135</code></p>
<p>In that order</p>
<p>Why is there so much variability in scores?
Which score most accurately reflects this persons intelligence quotient?
Is this correctly measured within the confidence interval or margin of error of Raven's 2.</p>

CC BY-SA 4.0
2021-05-23T04:37:31.520Z
Seems like normal variation to me. IQ isn't any more precise than this. Its a mistake to think there is meaningful differences between these scores.
Bryan Krause
CC BY-SA 4.0
2021-05-23T22:37:02.047Z
Okay. It's strange to me that others would speak about their scores as being single point numbers then.
amsdecember
CC BY-SA 4.0
2021-05-23T22:56:17.973Z
Yes, it is strange and shows those people don't understand what IQ is.
Bryan Krause
<cognitive-psychology><intelligence><statistics><iq>
What is the Reason Behind This Individuals Variability in Raven's 2 Clinical Edition Scores?
amsdecember
# What is the Reason Behind This Individuals Variability in Raven's 2 Clinical Edition Scores?

(Asked by: username_0 on 2021-05-22)

The Raven's 2 Clinical Edition developed by Pearson features an item bank comprised of questions numbering in the hundreds.

Because of this each test differs from the other with possible combinations of different questions numbering in the millions. This was developed for test security in as well as practice effect mitigation. A friend of mine has taken this test a multitude of times resulting in variable scores with a large spread. He knows he's not supposed to.

The scores of a three month long period are as follows.

`144, 133, 130, 150, 140, 140, 141, 130, 135`

In that order

Why is there so much variability in scores?
Which score most accurately reflects this persons intelligence quotient?
Is this correctly measured within the confidence interval or margin of error of Raven's 2.

**Tags:** cognitive-psychology, intelligence, statistics, iq

> **Comments:**
> **username_1**: Seems like normal variation to me. IQ isn't any more precise than this. Its a mistake to think there is meaningful differences between these scores.  
> **username_0**: Okay. It's strange to me that others would speak about their scores as being single point numbers then.  
> **username_1**: Yes, it is strange and shows those people don't understand what IQ is.  

---

## 0 answers

