Research shows that if you list at least three things you’re grateful for everyday, you will significantly improve your mental health. Does it really , or does this line just sound good? If you're going to make a claim like this, you should probably link to peer-reviewed research that backs this up.
Even peer reviewed research won't make me believe claims like that. Experimental psychology seems a field plagued by replicability crisis, and frankly I think the field is just a self perpetuating paper mill for those in it, and a futile pursuit. Psychology in my view needs a theoritical approach. Did Freud, William James etc need to do experiments with 30 graduate students to study about the working of the mind, and…
Specifically what it means is that the current binary system for describing significance is built precisely in such a way that even in the case of true effects, the probability that two studies would disagree could be as high as 50%. Therefore we need better metrics to describe the evidence. What it does NOT mean, is that all the research conducted is sham and worthless.
Specifically, if one study finds p=0.045 and another finds p=0.055, then the two studies will be in conflict (i.e. failure to replicate). But to use those pvalues to then claim "there is no evidence of an effect" shows a misunderstanding of the whole process, since a pvalue of 0.055 is actually pretty good evidence (just not as good as our arbitrary threshold).
Popularisation of the term "replication crisis" as a term is part of the problem if you ask me. It points the finger completely in the wrong direction.