reciprocity of liking; reciprocal liking
Psychology term: the tendency to like someone more when you believe they like you. Used in academic or explanatory contexts.
Reciprocity of liking is a concept often discussed in interpersonal attraction research.
When you learn that someone likes you, you tend to like them back. This is called reciprocity of liking.
返報性の原理 is the broader principle of reciprocity (e.g., returning favors), while 好意の返報性 specifically refers to reciprocal liking in interpersonal attraction.
Compound of 好意 (liking, goodwill) + の (possessive particle) + 返報性 (reciprocity). A technical term in psychology, likely a direct translation of the English concept 'reciprocity of liking'.