Final answer:
Keller et al.'s study relates to the three cultural models, which are essential in understanding how culture influences relationship dynamics. The study contributes to insights into the role of expressive and instrumental complementarity in familial practices across cultures.
Step-by-step explanation:
The study by Keller et al. is related to the three cultural models which include functionalism, conflict theory, and symbolic interactionism. These models provide a framework to understand the influence of culture on relationship dynamics.
Keller et al.’s study likely contributes to this understanding by considering the impact of different cultural backgrounds on familial roles and how they complement each other in expressive (emotional) and instrumental (practical) terms. These insights are crucial for interpreting how culture shapes relationships, and how societal changes, like immigration patterns and technological advances, affect these dynamics.