参考答案：

解析：The term cognitive means knowledge and "cognitive" psychology can be defined as the study of people’s ability to acquire, organize, remember and use knowledge to guide their behaviour.As for the acquisition of knowledge,cognitive psychology believes that there are two principal types of cognitive structures which are called schemas and concepts. Theschemas refer to sets of rules that define categories of behaviour and concepts are rules that describe properties of events and their relations with one another. Children acquire schemas and concepts by interacting with their environment with the help of two processes-assimilation and accommodation.