When working with humans, it's important to understand the technology to ensure we can complete tasks without hesitation and uncertainty during sessions. When therapists try out new technology that they aren't comfortable with, it may cause patients to lose faith in the process and dampen their enthusiasm for treatment. Knowing a person's past can help determine their choice of games in Virtual Reality Development because they react differently whether they are significant games (for different preferences, interests or places of familiarity) or indifferent games.