Methods: Participants were 30 students (18 males, 12 females) at the University of Iceland, aged 20-30 years (mean = 23 years).
Aðferðir: Þátttakendur voru 30 nemendur (18 karlar, 12 konur) við Háskóla Íslands á aldrinum 20-30 ára (meðalaldur = 23 ár).