In psychology, the critical period can be defined as the period in which some sort of transformation takes place in a limited time. <u>The critical period is that phase of life which is </u><u>important for the development</u><u> of certain skills psychologically. This period is also necessary for the development of an organism so that it can progress in a normal manner.</u>
It is the period during which the sensitivity of the nervous system is high. The critical period is also known as the optimal or the sensitive period.