Don Thomson is an Emeritus Professor of Psychology at the Deakin Burwood campus. His research focus is in forensic psychology, specifically the interface of psychology and the law. Don is well-placed to observe this interplay considering his background in both areas. Right from when he first completed his PhD, Don was making an impact in the field of psychology. His research on the encoding specificity principle and impact and influence of memory retrieval helped show the importance of context. The findings of this research on memory retrieval led to the development of the technique “cognitive reinstatement” which is now commonplace police interviewing procedure.
After further studies at Yale as a research psychologist, Don returned to Australia to take up a position at Monash University. Based on his memory research he was invited by Justice Michael Kirby, then Chair of the Australian Law Reform Commission, to be a member of a working group creating the Uniform Evidence Act. In order to better inform his interactions with the legal system, Don completed a law degree, his articles, and the bar readers’ course. He was admitted as a barrister to the Victorian Supreme Court in 1987. In 1992 he established the first post-graduate program in forensic psychology in Australia at Monash. His current research focus spans three different areas: existing identification procedures, jury issues, and testimony competency.
Current criminal case identification procedures use 8-10 people in a line-up presented simultaneously. There is a movement to change this identification procedure to a sequential method, where members of the lineup are presented one at a time. If the witness makes a positive identification the procedure stops. Don’s research suggests that simultaneous lineups in fact remain more effective than sequential, both in terms of correct identification as well as avoiding false identification of another member of the lineup.
Don’s research with legal cases involves both implied and theoretical jury issues. Some of these are quite topical, including in cases where television media has potentially generated prejudice due to reporting. His research has also looked at the variety of influence on juries, including what media form the article appears in, the intensity of the publicity and whether the reporting is emotive.
One of the fastest-growing areas in civil litigation is challenges to testamentary capacity, and Don is involved in several studies in this field to find the most effective way of assessing testamentary competency. He has also researched the issue of competency to stand trial, especially as it pertains to children.
As well as a wide range of education and experience, Don was the first psychologist to serve as chair of the Victorian Psychological Council and was the first President of the Psychologists Registration Board of Victoria. He is the current chair of the APS Ethical Guidelines Committee.
