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Judging Evidence Quality
Journal quartile
Also called journal quality, impact factor tier, q1 journal
Journal quartile (Q1 through Q4) ranks a journal's citation impact against others in its subject category, with Q1 being the top 25%. It's a rough proxy for influence, not a guarantee that any individual paper in it is good.
In context
You'll usually need this when a committee asks you to justify the outlets you're citing or targeting.