A first evaluation mode and a second evaluation mode for evaluating with a criterion different from the first evaluation mode are set and the second evaluation mode is applied to acquired information before application of the first evaluation mode to output the evaluation result. A user recognizes that the evaluation result is acquired from the current finger placement. If a change is made in the evaluation result by making transition from the second evaluation mode to the first evaluation mode, the user sensuously recognizes again that the finger placement is not proper from the evaluation result and is prompted to perform a correct operation of the finger position.