Answer: Making fundamental attribution error
Step-by-step explanation:
Fundamental attribution error is defined as error in which consideration is based on personal characteristic and feature and situational factors are avoided wile making judgement on any individuals behavior.
According to the situation mentioned in question, Dr. Townsend is emphasizing the personal traits of immaturity and youth over the poor performance of students taking the course as the situational state. Thus, this is describing tat Dr.Townsend is making fundamental attribution error wile judging the students.