model claims satisfaction cannot be the sole factor in commitment
outlines three elements
satisfaction - measured through the level of profit (costs vs rewards)
comparison with alternatives, one remains in a relationship if there aren’t any better options
investment, what a partner has put into the relationship that they stand to lose in a breakup
intrinsic, placed directly into it e.g. time, money, a house
extrinsic, factors associated with the relationship e.g. children, mutual friends
relationship maintenance mechanisms - behavioural features of healthy relationships e.g. not engaging in tit-for-tat, unconditional positive regard, ridiculing of alternatives
AO3
explains commitment in abusive relationships, accounts for these situations in which there is no/very little satisfaction
Le and Agnew (2003) reviewed 52 studies with a total of 11,000 ppts and found each element of Rusbult’s model to be a strong indicator of commitment, this finding was true regardless of culture, age, gender and sexuality
causation may operate in the opposite direction, perhaps those who feel more committed to their partner are more likely to invest in it
self-report measures are not an issue as it is one’s own perception of the different factors that is actually influencing their commitment behaviour, whether they are accurate is neither here nor there
the idea of investment is too simple as it ignores a third factor - the future - this includes investments such as plans for the relationship's progression, or simply physical plans like an upcoming holiday