[1] His range of works include the role of life events, coping and crisis support in the aetiology of eating disorders, stress- and trauma-responses, and mobility into the social rank and attachment.

[4] He supervised the founder of Psychreg, Dennis Relojo-Howell for his research project on expressive writing at the University of Hertfordshire.

[1] In 2013, he assessed the use of an expressive writing task to increase self-reassurance and reduce self-criticism using a randomised controlled design.

[12] In 2009, he illustrated how some word types in David Bowie albums correlate with how long they spend in the charts.

Troop has written a song that amplifies these results, maximising the use of these words to create the "ideal" Bowie lyric.