Table 6. Reasons given by PI for withholding ECR name.

Themes and supporting examples of write-in responses to the question: “Consider cases where you contributed to a peer review report and you know your name was NOT provided to the editorial staff. When discussing this with your PI, what reason did they give to exclude you as a co-reviewer?”.

Theme	Example write-in response
Sin of omission	“They forgot”
	“Didn’t think of including me; didn’t know how to do so”
	“He was in a hurry and he couldn’t figure out the journal’s website”
Cultural expectations	“This was not explicitly discussed, but the PI implied this is “common practice” and normal for ECRs to gain experience”
	“[PI] said only [they] would be invited to review for such a prestigious journal and “we” need this for future submissions”
	“Apparently this duty is part of my job description”
	“I was told this is how one gets to train to review papers and grants”
A good way to train	“Reviewing papers as [an] ECR is part of the ECR training”
	“It’s good experience for me.”
	“It was good for my career to practice.”