Investment model

• Rusbult; if you are profitable, you are more satisfied meaning a longer-lasting relationship. But to remain in this, you must be committed
• intrinsic investment; direct things you put into a relationship; money, time, effort, emotions
• extrinsic investments; things you receive because of a relationship; children, house, memories
• Investment size increases dependent on how long you spend in the relationship, showing more commitment

  
• maintenance strategies; show willingness to sacrifice rewards

  • paint them in a negative way, ridicule alternatives
  • positive illusions
  • blame them
• evaluation;

  strengths

  • ecological validity for all couples, provide an explanation to why people do and dont commit in both types of couples
  • meta analysis from Le and Agnew, 52 studies, found that satisfaction, comparison and investment size were all predicted with relationship commitment
  • holistic theory
  • understands humans have irrational decision-making, when dissatisfied we still commit

  weakness;

  • Le and Agnew, correlational research, invest to commit or be committed and then invest
  • investment model fails to consider ideas of future investments, doesn't consider complexity