<p>The psychology notation for standardized differences between group means is <em>d</em>. I.e., the difference between group differences divided by the within-group standard deviation. Note that there are some variants about which group is used or whether a pooled standard deviation is obtained.</p>

<p>I.e., in your example: <em>d</em> = 0.3.</p>

<p>If you want to report means and sds, then you typically use <em>M</em> and <em>SD</em>.</p>

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2020-02-18T01:41:38.137Z
2020-02-18T01:41:38.137Z
Jeromy Anglim
<p>I am just getting into watching psych lectures and things online and am taking notes but I have been wondering what the proper/standard way of writing in note form about standard deviations is.</p>

<p>For example: GROUP-A is a third of a standard deviation higher in TRAIT than GROUP-B.</p>

<p>Is there a standardised way of representing that information with a kind of notation or shorthand in psychology?</p>

<p>Thanks! And sorry for the very basic question!</p>

<measurement><personality><statistics><test>
What is the notation about group differences in terms standard deviations?
lehtia
# What is the notation about group differences in terms standard deviations?

(Asked by: username_0 on 2019-08-08)

I am just getting into watching psych lectures and things online and am taking notes but I have been wondering what the proper/standard way of writing in note form about standard deviations is.

For example: GROUP-A is a third of a standard deviation higher in TRAIT than GROUP-B.

Is there a standardised way of representing that information with a kind of notation or shorthand in psychology?

Thanks! And sorry for the very basic question!

**Tags:** measurement, personality, statistics, test


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## 1 answers

### Answer by username_1 on 2020-02-18. Score: 1

The psychology notation for standardized differences between group means is *d*. I.e., the difference between group differences divided by the within-group standard deviation. Note that there are some variants about which group is used or whether a pooled standard deviation is obtained.

I.e., in your example: *d* = 0.3.

If you want to report means and sds, then you typically use *M* and *SD*.


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