Groups of eight students asked fewer questions ( @ ( @ - @ ) vs. @ ( @ - @ ) , p < @ ) , had less hands-on time ( @:@ min ( @:@ - @:@ min ) vs. @:@ min ( @:@ - @:@ min ) , p = @ ) , conducted more unrelated conversations ( @ and @ , p < @ ) and had lower self-assessments than groups of three students per tutor ( @ ( @ - @ ) and @ ( @ - @ ) , p = @ ) .