# Cohen's d in SPSS

Discussion in 'Psychology [Psy.D. / Ph.D.]' started by neuropsyance, Oct 4, 2010.

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1. ### neuropsyance 2+ Year Member

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Oct 8, 2009
Anyone know how to compute it? I haven't used SPSS since freshman year of undergrad and now they're making me (literally forcing me) to use it again. I'm trying to compute Cohen's d, the last thing I need for this assignment. I'm going to bed for the night, and expect some guidance when I wake up SDN!

neuropsyance

3. ### JockNerd 5+ Year Member

Mar 28, 2007
SPSS doesn't give it to you. The formula is simple and is obtainable from any google search for "cohen's d." There are half a dozen online calculators for it.

4. ### neuropsyance 2+ Year Member

199
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Oct 8, 2009
Our instructor's assignment said to "use" SPSS to compute Cohen's d. I knew the calculation, but couldn't find it in SPSS (for now obvious reasons). She must have just made a typo haha.

5. ### LGPsychology 2+ Year Member

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Oct 29, 2009
Straightforward after that.

6. ### krisrox 7+ Year Member

647
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Mar 16, 2009
+1 on G Power.

It is amazing.

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Jan 8, 2012
Hi, perhaps your tutor wanted you to just use a formula to compute cohens d from some other information you have - do you have r or z for example, because if you do then d=(2r)/sqrt(1-r^2) and d=(2z)/sqrt(N-z)...spss doesn't necessarily have to have an option to calculate d for you....you can just use the transform function.

8. ### JockNerd 5+ Year Member

Mar 28, 2007
You use the SPSS output to calculate it, but spss does not provide d. Use an online calculator.

9. ### Psychadelic2012PhD Student 2+ Year Member

827
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Sep 17, 2011
This. Use the syntax editor to compute it yourself.

213
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Jul 18, 2011
try this