Detection of errors in statistical problem solving

摘要: Ten subjects were asked to think aloud while solving two statistical problems. The instructed after each substep of his/her problem solving, check in various ways the solution previous substep. detected 25 out a total 56 errors when they solved About half computational errors. Nine eliminated response checking instructions. data indicated that subjects' most common way detecting their own was by noting computations resulted extreme values. Subjects also (a) “spontaneous discovery”; (b) discontent with other aspects than numerical value answer; (c) repeating solution. last mentioned type error detection only occurred responded Finally it found had strong tendency respond instructions either routinized or non-elaborated way. It discussed how formulation can be improved order avoid this effect.