This research by Prof. Kevin A. Harrigan at the University of Waterloo looked at how slot players’ perceptions were influenced by a technique that has been used since 1983 in North America, called “clustering.” By observing the player perceptions (the frustration effect, the perception of early wins, illusion of control, biased evaluation of outcomes, entrapment, and irrational thinking) as well as looking at transcripts from Nevada hearings where proponents were aware of the psychological effect on players from near misses and virtual reels, the researchers raise concerns over the connection with misrepresented game outcomes and problem gambling.

Slot Machines – Pursuing Responsible Gambling Practices for Virtual Reels and Near Misses