Abstract
Sackett, in a remarkable paper published in 1979, ‘Bias in Analytic Research’, was the first to propose a catalogue that would include a list of biases that ‘may distort the design, execution, analysis and interpretation of research’.1 2 Sacket’s pioneering work identified, labelled and discussed 35 biases. In the conclusion of this paper, Sackett highlighted, among others, two priorities for future researches: the continued development of the proposed catalogue and the empirical evaluation of the proposed biases.2