Psycholinguistics is a course which is addressed to third-year BA students at the English Department-University of Mohammed Seddik Ben Yahia, Jijel. In a nutshell, Psycholinguistics is defined as the study of the interrelation between linguistic factors and psychological aspects. Psycholinguists are often interested in knowing how language and speech are acquired (Acquisition), how language and speech are produced (Production), how language and speech are comprehended (Comprehension), and how language and speech are lost (Dissolution). In accordance with this line of thought, the students in this course will be introduced to an intriguing aspect of psycholinguistics which is “Language Acquisition”. Particularly, light will be shed on the stages of first language acquisition. In other words, the students will be acquainted with developmental psycholinguistics. Moreover, examples of feral and isolated children will be brought to the fore so as to highlight the issue of the existence of a critical age for First Language Acquisition. Whether or not such a critical age  could be extended to Second Language Acquisition will also be discussed.