Changing the wording changes your depression score

A randomized trial altered only the instructions on the PHQ-9 and GAD-7 — and the same people scored differently.

We treat depression and anxiety questionnaires like neutral rulers, but this randomized trial shows the ruler can bend. Researchers recruited 200 U.S. adults who had been diagnosed with or treated for major depression or generalized anxiety, and had each person complete the two most widely used screeners, the PHQ-9 (depression) and GAD-7 (anxiety), twice in one sitting. The control group got standard instructions both times. The intervention group got standard instructions first, but before the second round they were simply reminded to pay attention to the wording of the instructions, with emphasis on the word “bothered” (as in, how often have you been bothered by these problems). That tiny nudge produced a real drop: intervention participants scored about 2.6 points lower on both the PHQ-9 and GAD-7, and were roughly 14 times more likely to show a greater-than-20% reduction in their depression score. The point isn’t that anyone was faking, it’s that these tools aren’t perfectly objective, and small differences in how they’re administered can move scores enough to matter in clinics, research, and mental-health apps. A strong case for standardizing exactly how screeners are delivered.