What is the filter theory?
What is social demography?
What is similarity in attitudes?
What is complementarity of needs?
Evaluate the filter theory. (ADVANTAGES)
1) Winch (1958) found that similarity of interests, attitudes and personality are typical of the early stages of a relationship, and that complementarity of needs was more important than physical attractiveness.
- This lends support to filter theory.
2) Research conducted by Taylor (2010) found evidence to support the filter theory.
- He found that 85% of Americans who got married in 2008 had married someone from their own ethnic group, supporting the social demographic idea.
- Individuals seem to choose partners that were similar to them and had a similar background to them (ethnicity). (+)
Evaluate the filter theory. (DISADVANTAGES)
1) There is some evidence that people who spend lots of time together (not just romantic partners) become more similar in beliefs and attitudes over time.
- This suggests that being in a relationship may cause the similarity between partners, rather than being the cause of the relationship in the first place, so weakening filter theory.
2) Research conducted by Levinger (1970) has found that many studies have failed to replicate findings from Kerckhoff and Davis based on filter theory.
- Levinger conducted research using 330 couples and found no evidence that similarity of attitudes or complementarity of needs was important when looking at how permanent the relationship became over time.
- There was also an issue on deciding when a short term relationship becomes a long term relationship.
- Kerckhoff and Davis stated that at 18 months a relationship becomes long term, but this has been disputed