Dr. Hewitt, in collaboration with Dr. Gordon Flett and other researchers, has developed various clinical and research instruments for assessment of various aspects of perfectionistic behaviour. These measures are available for downloading under the relevant tabs to the left. Normative data are also provided for several of measures. PDF’s of papers and chapters describing the development and validation of the measures are also contained under the respective tabs. Some chapters generally describing these and other perfectionism measures are available below.