Some behaviours of interpersonal relationships seem to be more influenced by cognitive factors than others. For example, the attraction-similarity model proposes that the initial cause of attraction could be attributed to similarities in hobbies, interests, and others. Additionally, the familiarity hypothesis states that attraction originates from the fondness generated by the sight of something routinely familiar - where situations of being exposed to a certain aspect increases one’s fondness towards it. From the two examples present in the stimulus, it is evident that cognitive factors tend to elaborate the process on how attraction is developed.

However, evidence suggests that biological factors were more present over the course of the relationship after attraction has been established. For example, oxytocin decreases anxiety and aggression - allowing couple to be more intimate and trusting of each other, while the dopamine reward system provides an intense motivation for positive attitudes towards a partner in efforts of winning them over and making them happy. Hence, the stimulus implies that biological factors were more influential in the maintenance of relationships.

On the other hand, culture may not have much effect toward interpersonal relationship as love is a universal language. Other factor such as cognitive may have a greater effect in personal relationship as people tend to attracted to someone who either make them feel welcomed, they perceived as similar, and fulfill their own criteria for desirable partner. This factor doesn’t bound to  or affected by culture. 

 

However, in maintaining a relationship, biological factors play a more significant role such as oxytocin and dopamine. Where oxytocin helps to elevate our mood and intensify the feeling of attachments. While dopamine helps humans to generate emotions when we think about the special person. Thus, both cognitive factors and biological factors plays a role in interpersonal relationship where cognitive factors in the development of a relationship and biological factors in  maintaining a relationship.

Some behaviors in interpersonal relationship are more likely to be influenced by cultural factors, which implies culture has an effect on whom is considered as attractive, as well as how we form our relationship. For example, the mere-exposure effect explains that people tend to develop a preference because of familiarity. When someone is similar to their preferences, this results in attraction and it can form relationships.

However, it seems that biological factors is more evident in playing the role in interpersonal relationship. For instance, oxytocin plays a role in intensifying feelings of attraction. Thus, the individuals will become more attached. 

In conclusion, culture does play a role in the development in a relationship, while biological factors display how relationship is maintained, 

Hormones like oxytocin for example play a large role in the early stages of bonding and are considered as a mechanism for love and attachment as well as affecting an individual’s mood or influencing feelings of happiness attributed to the individual’s personal relationship towards another individual. Another form of attraction may come in a form of a neurological response similar to drug addiction. Passionate romantic love is a neurobiological process similar to drug addiction as they share similar symptoms of substance abuse and addictive behavior.