Ma'anar ƙamus na kalmar "limen daban-daban" ita ce mafi ƙanƙanta bambanci a cikin ƙarfin ƙarfafawa da ake buƙata don samar da bambanci mai ban sha'awa a tsakanin abubuwan motsa jiki guda biyu. Ana kuma san shi da bambancin sanannen kawai ko JND. Tunani ne da aka fi amfani da shi a cikin ilimin halin ɗan adam da ilimin halin ɗan adam don fahimtar fahimtar hankalinmu da kuma ikon iya bambanta tsakanin abubuwan motsa jiki daban-daban.