表达什么最少、什么最多、什么居中间
Dickerson found that the correct target language variant was used most frequently in (3) and least frequently in (1), with the frequency in (2) in between. (P81 Understanding SLA)
Lococo(1976) found that twenty-eight university students enrolled in an elementary Spanish course produced systematically fewer errors in adjectives, determiners, and verbs when the task was translation than when it was free composition, with the scores for the picture description task intermediary. (P82 Understanding SLA)