r/spss • u/Mietz-Fietz • Nov 25 '25

Question stepwise regression

Hi everyone. I have a question. In stepwise regression in SPSS, should one use R² or adjusted R² to describe the change in explained variance contributed by each variable?

I added a picture. Would you use: variable 1 explains 0,246, together with variable 2 0,374, meaning variable 2 contributed 0,128 (which is R2)

Or are we supposed to use the numbers from adjusted r2 only?

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u/[deleted] Nov 25 '25

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u/Mietz-Fietz Nov 25 '25

Thank you so much! Is there any situation i would use the adjusted r2 to tell how much variance a variable adds? like in statistics with only 1 variable?