Diagnostic bias in organizational consultation

This article is intended to improve consultation practice by explaining the significance of models, heuristics, and diagnostic aids in organizational diagnosis. The role of diagnostic models in determining the consultant's frame of reference is explained. Evidence that organizational consultants consciously use diagnostic models is provided by citing two independent studies that revealed about 70% of the consultants reported that a diagnostic model was used. The availability, representativeness, and anchoring heuristics used by diagnosticians are summarized and examples of their use are cited. Readers are warned that bias occurs from misapplying the heuristics. However, guidance on correctly applying the heuristics is provided. The development and improvement of diagnostic expertise is explained from the perspective of learning through education as well as feedback received from clients, colleagues (as shadow consultants and as consulting team members), and self. Thus, written from the perspective of a consultant, the article provides a practical presentation on diagnostic bias, supported by theory and empirical research. It should appeal not only to a consulting constituency (i.e. practicing consultants, consultant trainers, and novice consultants), but also to the large number of potential clients (i.e. organizational decision-makers). Future research directions are discussed in terms of (1) the research that has identified relationships between consultant characteristics (e.g. Jungian constructs) and diagnostic information, and (2) the potential of expert systems in organizational diagnosis.