Figure 7From: Understanding Ferguson's δ: time to say good-bye? Same scale, different δ values. Illustration of the association between the score distribution and Ferguson's δ using real life data. Figure A represents the distribution of the 4DSQ depression scale in a sample of employees (n = 3852); Figure B represents the distribution of the same depression scale in a sample of general practice patients with depressive symptoms (n = 177).Back to article page