Abstract
Four groups of Year-8 students completed a set of 2-stage Pythagorean
problems under differing conditions. One group completed the set with
specific goals (find x) without instruction; the second and third groups were
encouraged to either work forwards or backwards from the goal (x); whereas,
the fourth group completed the set with unspecified goals (no x's). On a
subsequent set of test problems, the no-goal group demonstrated a superior
performance than the other groups in applying Pythagoras' Theorem.