Sam has dreamed of owning her own home for years, and she can finally afford a small cottage in an older neighborhood. She notices that she feels more positive about her decision to buy her home when...

Sam has dreamed of owning her own home for years, and she can finally afford a small cottage in an older neighborhood. She notices that she feels more positive about her decision to buy her home when she drives by some rundown houses, but she hates her home when driving past fancy mansions with their large lawns. What principle of decision-making does this example illustrate?