The behaviorists believe that FLL consists of learners imitating what they hear and develop habits in the FL by routine practice. In this view, the learners are thought to relate what they know of their L1 to what they recognize in the L2. "Positive transfer" is a result of similarities between the L1 and the L2, because habits used in the L1 easily transfer to the L2. On the other hand, "negative transfer is caused by differences between the L1 and the L2, because errors result from using habits from the L1 in the L2.