Next Friday, Steph, Scott, Cameron or Ray will emerge from the House as the winner of Big Brother.
We've got to know them pretty well over the past few weeks - but no one knows 'em better than the psych team!
Here's what the experts had to say about the final four...
Steph - The Cleaner
According to Dr Sandra Scott this year's housemates have preconceived ideas on how to survive the stress-provoking Big Brother game. Steph is no exception.
The mini housemate has controlled her negative emotions by using a sophisticated emotional defence system known as sublimation. This is when individuals deal with stresses by channelling their anxious energies into pro-social behaviour, in Steph's case... housework!
By a long margin she does more than any of the other housemates, and can spend up to five hours a day on housework.
Even with her chores however, sometimes the pressure is still too much. At these times we see Steph drop her guard and reveal her insecurities
With the mounting pressure of the final week, chores may not be enough to contain Steph's anxiety. If she cannot find another emotional outlet we may see even more of what lies beneath the surface.
Scott - The Player
Scott outwardly appears to be one of the most balanced housemates, says psychologist Geoffrey Beattie, however, he has consistently had the worst sleep patterns in the BB house.
Scott may appear very laid back, but he often controls conversational flow in a complex way. On Day 56, Scott used a variety of devices to get Ray to reveal perhaps more than he intended. He took the empathetic stance of a therapist to get Ray to disclose, but then immediately retracted his enquiry.
There is clearly more to Scott than meets the eye. The question is for how much longer can he stay in control?
Cameron - The Guardian
Cameron, like all of the housemates this year, has a clear understanding of the game - you have to have a strategy to survive, comments Dr Sandra Scott.
Most of the way through Cameron has managed to refrain from imposing his high moral values on his housemates, by finding an outlet for his criticisms. From week one, he used the Diary Room as a confession booth.
