Problem: Anton and his friends are discussing a study he read about in his social psychology class. In the study, the researchers claim that most couples who pool their ?nances together have stronger relationships. Jamie questions the study, saying, "Which couples did they study? Did they include a range of different socioeconomic statuses?" Leroy also questions the study, saying "What do they mean by stronger relationships? How exactly do you measure what makes a relationship strong?" Marissa is also curious about the study, asking "Are they suggesting that pooling ?nances together leads to a stronger relationship? Couldn't there be a third variable, like good communication skills, that accounts for both variables?" Jamie's concern addresses which of the following?
- the study's statistical validity
- the study's internal validity
- the study's external validity
- the study's construct validity