Items were written and subsequently modified after receiving'
reactions sought from selected experts, teachers, and junior high
schoo' s,tudents. . The resulting preliminary version was field tested
with several samples of students and teachdrs in the Sydney metro-politan area. Data were subjected to item analyses in order to
identify items whose removal would enhance each scale's internal
consistency (the extent to which items in the same scale measure the
same dimensions) and discriminant validity (the extent to which a
scale measures a unique dimension not covered by the other scales in
the instrwent).