Question

On the first exam in an Introductory Psychology class, the grades are lower than Professor Mutola expected. She suspects that multitasking is to blame. She bans computers and cell phones from her class between the first and the second exam. When she compares the scores on the two exams, she finds a significant improvement on the second exam. When Professor Mutola rechecks her data, she finds that the five students with the lowest scores on the first exam have dropped the class. What threat to internal validity is this?

A.attrition / mortality

B.history

C.testing

D.maturation

Answer 1

Answer-A) attrition / Mortality

Explanation-Internal validity is an effective method to determine whether the research is successful or not. It involves identifying how many confounding variables a researcher has in his experiment. Here five students who have a lower score have dropped the class which clearly illustrating that here the threat to internal validity is attrition.