It's most likely an effect of the way research participation credit systems work in Australian universities. Not sure about grad level courses but in undergrad courses with a research participation requirement usually only need a small number of hours (3hrs for Level 1 Psych at Adelaide Uni) to fulfill those requirements. Given that there are usually dozens of research projects going at any given time, it makes demand for participants high. To prevent fistfights between project groups, most unis limit the amount of time any given project can utilise students needing course credit.thaluikhain said:As mentioned, seeing what people are like after playing a game for 20 minutes is missing the point, or deliberately constructing a strawman.
Plus, if this study originates from the School of Psychology, they'd had to have sold the Human Research Ethics Committee on the merits of the study to go ahead with it. They can get really touchy about shit if you're asking for too many research hours.
To be completely honest, though, this study sounds like something an undergrad student would throw together.