This article presents findings of the study on the structure of social representation of lecturers’ activities and their dynamics on the basis of the credibility of a source of information. The study is sought to find out what constitutes central and peripheral elements of social representation of lecturers’ activities in view of survey participants (undergraduate programme students of Klaipėda University), whether the said elements change upon reliable and unreliable sources of information, and what determines potential dynamics of elements of the representation. Answers to the above questions will significantly help to understand lecturer-student relationships, to change negative or adverse communication attitudes into positive ones. Insights of this study can be applied in lecturers’ activities so as to better understand today’s students, a role of lecturers, formation of positive attitudes in students towards lecturers’ activities and communication.