Armando is conducting a. study for his PSY—SO Research Methods class. He is curious as to wheth— er watching romantic movies makes people more committed to their romantic relationship.

He collects a sample of men in dating relationships and divides them into two groups. One group watches a 5—minute clip of a movie in which the main characters are having a romantic first date.

The sec-0nd group watches a 5—minute clip from the same movie in which the main characters break up. After the participants watch the movie clip, they are then asked to write a sentence about their relationship.

Armando counts the number of uses of the words we and us as a measure of commitment. After conducting the study, he finds that there is not a statistically significant differ— ence between his two groups.

1. A member of Armando’s lab group suggests that the null effect may be due to insufficient between-group variance.

Describe two ways that Armando’s study may have had poor between— group variance and suggest how he could improve his study.

Suggestion to improve: Suggestion to improve: