turnabout

1. N-SING A turnabout is a complete change in opinion, attitude, or method. (观点、态度或方法的)彻底转变[英国英语] [oft N 'in' n]

As her confidence grows you may well see a considerable turnabout in her attitude. 随着她自信心的增强，你很可能会看到她的态度有非常大的转变。