Answer:
The behaviorist strategies that show to be least effective in therms of supporting language learning: error-correction.
Explanation:
The behaviorist strategies on language learning and acquisition, involves reinforcement or reward of some kind. This theory explains learning as a process that is based on the stimulus given to the learner to achieve the goal. A person learns through practice and imitation of the given excersises.
The less effective strategie would be error and correction, because a person needs to make mistakes in order to practice and learn. By focusing on the error and the correction, this may not be the most motivatinal strategy for a student.