一项英国研究称，如果学龄前小孩不愿吃蔬菜，只要他们尝尝味道，就给他们一些小奖励，或许可以帮助小孩吃下原本不想吃的食物。研究发现，每当3、4岁的小孩吃点不喜欢的蔬菜，家长就发贴纸给他们，可以慢慢改变小孩的态度。几周后，获得这种奖励的小孩，对蔬菜的评价变高，从1到2级（大概介于“恶心”与“还好”），上升到2到3级，相当于“还好”与“好吃”之间。研究显示，在实验室的味觉试验中，有贴纸奖励的小孩也更愿意吃更多蔬菜，不管是红萝卜、芹菜、小黄瓜、红辣椒、卷心菜还是碗豆。而口头赞美之所以无效，是因为小孩可能觉得爸妈说的话“不真诚”。

If your preschoolers turn up their noses at carrots or celery, a small reward like a sticker for taking even a taste may help get them to eat previously shunned foods, a UK study said.

Though it might seem obvious that a reward could tempt young children to eat their vegetables, the idea is actually controversial, researchers wrote in the American Journal of Clinical Nutrition.

That's because some studies have shown that rewards can backfire and cause children to lose interest in foods they already liked, said Jane Wardle, a researcher at University College London who worked on the study.

Verbal praise, such as "Brilliant! You're a great vegetable taster," did not work as well.

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