Fig. 3From: Challenges in measuring depression among Ugandan fisherfolk: a psychometric assessment of the Luganda version of the Center for Epidemiologic Studies Depression Scale (CES-D)Test Information Function and Standard Error of Measurement for the reduced 13-item CES-D. The Y axis indicates the amount of information (solid line) or error (shaded area between the dotted lines) that the reduced 13 item CES-D has at various levels of the latent construct, which is represented by the X axisBack to article page