Citation Siddaway A (2014) Measurement of depression and anxiety problems has not kept up with theory and evidence. British Journal of Psychiatry. http://bjp.rcpsych.org/content/190/1/81.2.e-letters; https://doi.org/10.1192/bjp.190.1.81a
Abstract First paragraph: I am concerned that the measurement of depression and anxiety problems is falling behind the theory and evidence. This is a central concern because measurement fundamentally shapes conceptualisation, research and clinical practice. This letter is a call to re-start the scientific cycle again so that current knowledge regarding depression and anxiety problems once again closely underpins endeavours to measure these constructs. To illustrate my point, I present four examples by which depression and anxiety problem measurement has generally not kept up with theory and evidence.