1. Bedford, R., Pickles, A., Sharp, H., Wright, N., & Hill, J. (2015). Reduced face preference in infancy: A developmental precursor to callous-unemotional traits? Biological Psychiatry, 78, 144–150.
2. Bernstein, D. P., & Fink, L. (1998). Childhood trauma questionnaire: A retrospective self-report manual. San Antonio: The Psychological Corporation.
3. Bernstein, D. P., Fink, L., Handelsman, L., & Foote, J. (1994). Initial reliability and validity of a new retrospective measure of child abuse and neglect. American Journal of Psychiatry, 151, 1132–1136.
4. Bowlby, J. (1969). Disruption of affectional bonds and its effects on behaviour. Canada’s Mental Health Supplement, 59, 12.
5. Cleckley, H. (1941). The mask of sanity. St Louis: C. V. Mosby.