negative reinforcer

例句：

1. 1. In the study, the negative reinforcer was found to have a significant effect on the participants' behavior.
   在研究中，发现负强化物对参与者的行为有显著影响。
2. 2. The teacher used the negative reinforcer to encourage the students to work together.
   老师使用负强化物来鼓励学生合作。
3. 3. The experiment demonstrated that the negative reinforcer could effectively enhance the children's learning motivation.
   实验表明，负强化物能有效提高儿童的学习动机。