EXAM Secure /https//usflearn.instructure.com/courses/1229664/quizzes/1624380/tak
ID: 3493198 • Letter: E
Question
EXAM Secure /https//usflearn.instructure.com/courses/1229664/quizzes/1624380/take Dr. Kang, a cognitive psychologist, conducts an experiment examining the effect of emotion on memory. He provides lists of 15 words to two groups of participants at his university. He puts the names of all the participants in a hat. The first 20 names he assigns to Group A, and the last 20 he assigns to Group B. Group A is given a list of words that are very emotional in content (e.g., passion, murder). Group B is given a list of words that are neutral in content (e.g., houseplant, desk). He then measures how many words each group is able to remember after being distracted for 5 minutes by watching a video about the history of the university. He finds that Group A remembers 15% more words than Group B. Dr. Kang's decision to assign participants randomly to Group A and Group B increases which of the following? The covariance of the study The external validity of the study O The temporal precedence of the study The internal validity of the studyExplanation / Answer
The internal validity in an experiment refers to how well an experiment is done. Internal validity in an experiment means how well the cause and effect relationship between the independent variable and dependent variable is carried out, whether the effects on dependent variable is due to the independent variable or was it because of an extraneous variable present. If there are any extraneous variables in an experiment, it results in low internal validity. In the above experiment, if the experimenter would have been biased while assigning participants to the two groups, it would have resulted in low internal validity. Thus, randomization plays a important role in increasing the internal validity of the study.
The correct answer is, D.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.