Boys just____ for the____ of it but girls will not waste___ on competition unless it pays. A Canadian study has___. Rose and Roy from the Gill University in Montreal and her colleagues got forty groups of four boys and four girls aged five to six or nine to ten to play two____ designed games. In one for __, the children had to____ beads on sticks until they are full, taking the beads from___ a common pot or another player. One set of____ meant that everyone would___ win. So competition was_____. Another set of rules_____ for only one winner. So competing makes____. The girls spent more time watching the____ of their competitors and_____ to them. They would_____ watch the facial_____ of their____ as they decided whether or not to take the bead. Sometimes they will decide not to , says Roy and the older girls wasted no time on competition____ when it paid off.