29. 다음 글의 밑줄 친 부분 중, 어법상 틀린 것은? [3점]
Providing feedback to students is a critical task of teachers.
General psychology has shown that knowledge of results is
necessary for improving a skill. Advanced musicians are able to
self-critique their performances, but developing music students
① rely on teachers to supply evaluative feedback. The most
constructive feedback is that ② which expresses the
discrepancies between a student’s performance of a piece of
music and an optimal version. Expert teachers give more
detailed feedback than general appraisals, and music educators
generally recognize that more specific teacher feedback
facilitates student performance improvement. Researchers also
have explored ③ whether the feedback of effective teachers is
more often positively or negatively expressed, that is,
constituting praise or criticism. One might intuitively think that
positive comments are more ④ motivated to students and, as a
result, are more associated with effective teaching. The
research, however, paints a slightly different picture. Although
positive feedback is ⑤ likely more helpful with younger
learners and in one-on-one instruction, more advanced music
students seem to accept and benefit from greater levels of
criticism in lessons.
motivated -> motivating