[tqi]

Is the estimated effect size (g=-0.35) -35%? That feels a bit high to me.

[heyjamesknight]

Cohen's d and Hedges' g shouldn't be interpreted as the size of the change in scores, but rather how the distribution is shifted. A score of .35 is considered a "low to moderate" effect.

https://rpsychologist.com/cohend/

[rpier001]

Effect size g is in units relative to variation. It's a corrected version of Cohen's d for cases of unequal variance between groups.