It was published in "Scientific Reports", a known low-quality journal. They are not necessary predatory like some of the truly bad journals, e.g., work in this journal still is supposed to pass the "not a low effort triviality and not obviously wrong" check and there are even some really cool things published in this journal. However, I generally take publications in this journal with a significant grain of salt.
Also, just FYI, "Scientific Reports" is not in a specific subfield -- I have published on quantum computing in this journal. That is not too strange, there are plenty of "generalist" journals that are good, but I thought it could still be useful context to know.
Well, it's been hand wavily described on 50 students with similar socio-economical backgrounds how much more replication would you like? There are also some references to statistics terms so it must have statistical power.
Also, just FYI, "Scientific Reports" is not in a specific subfield -- I have published on quantum computing in this journal. That is not too strange, there are plenty of "generalist" journals that are good, but I thought it could still be useful context to know.