Adam could not concentrate on the lecture because he was thinking of a
movie that he watched the previous night due to psychological reasons.
This is a conscious and unconscious phenomenon which is related to the
mind through how we feel and our thoughts. The professional who studies
psychology is known as psychologist.
The effect of Adam being distracted from the lecture due to thoughts
about movie previously watched is due to psychological reason. This what
made him being unable to concentrate during the lecture.
Read more about Psychology here https://brainly.com/question/3951300