I am not scientist enough to judge this, so please someone enlighten me: most categories i've read through that find a shift do so with an increase of about 0.1-0.2 standard deviations. that does not sound significant to me. is that enough to make the claims this study makes?
Statistically significant does not necessarily mean practically significant. If you just increase your sample size sufficiently, you can measure a significant effect, despite having a small magnitude of the measured effect:
https://en.wikipedia.org/wiki/Power_(statistics)#:~:text=Sta...
considering this is a review aggregating a bunch of small n studies from before we acknowledged the replication crisis in psychology, I'm going with "no"
