Psychologists have found that learning t----- place in this

Psychologists have found that learning t_____ place in this way.
首先,由于是心理学家（专家,权威）发现的“命题或者情况”我们把发现的内容当做客观真理,所以用一般现在时.不用过去时.
that 之后就是从句
从句中 learning 做主语
所以动词要接单数 takes
希望对你有所帮助!