Check this out. I think PCT can explain it - not sure how the researchers have?
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Dr Warren Mansell
Reader in Clinical Psychology
School of Psychological Sciences
2nd Floor Zochonis Building
University of Manchester
Oxford Road
Manchester M13 9PL
Email: warren.mansell@manchester.ac.uk
Tel: +44 (0) 161 275 8589
Website: http://www.psych-sci.manchester.ac.uk/staff/131406
See teamstrial.net for further information on our trial of CBT for Bipolar Disorders in NW England
The highly acclaimed therapy manual on A Transdiagnostic Approach to CBT using Method of Levels is available now.
Check www.pctweb.org for further information on Perceptual Control Theory