Don bincike da zaɓin ma'aikatan da suka dace, ana amfani da hanyoyi daban-daban daga arsenal na kimiyyar tunani: tambayoyin tarihin rayuwa, daidaitattun tambayoyin da ba daidai ba, ayyuka, aikin ƙirar ƙira da motsa jiki na yanayi, gwaje-gwaje akan nasara, hali, hankali da iyawa. .
Kara karantawa