Ma'anar ƙamus na "gwajin tunani" yana nufin daidaitaccen kima ko jarrabawar da aka yi amfani da ita don auna iya fahimtar mutum, aikin tunani, ko halayen tunani. An tsara gwaje-gwajen tunani don kimanta fannoni daban-daban na aikin tunani, gami da ƙwaƙwalwar ajiya, hankali, tunani, warware matsala, da iya fahimta. Ana iya amfani da waɗannan gwaje-gwaje don dalilai daban-daban, kamar bincikar rashin fahimta ko nakasar ci gaba, tantance hankali ko ƙwarewa, ko kimanta cancantar mutum don wani aiki ko aiki. ƙwararrun ƙwararrun ƙwararrun ƙwararrun masu horarwa ne ke gudanar da gwaje-gwajen tunani galibi, kamar masana ilimin halayyar ɗan adam ko masu tabin hankali, kuma suna iya haɗawa da nau'ikan ayyuka ko motsa jiki daban-daban, kamar tambayoyin zaɓi da yawa, wasanin gwada ilimi, ko kimanta tushen aiki.