law of effect law of diminishing returns • law of equal areas · · · Info · Definitions · Characters · · law of effect · · Text Common · · Latin · · Scripts 13 · · Length 4 · · Syllables Definitions · · · (noun) (psychology) the principle that behaviors are selected by their consequences; behavior having good consequences tends to be repeated whereas behavior that leads to bad consequences is not repeated. Synonyms: law of effect. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 l latin small letter l U+006C o latin small letter o U+006F t latin small letter t U+0074 w latin small letter w U+0077