 በተጨማሪም, ተመራማሪዎቹ ስለ አጠቃላይ ቁጥሮች ጥንቃቄዎችን ከመጠየቅ ይልቅ, ከግለሰብ ደረጃ ባህርያት ይልቅ King and Lu (2008) እና Hopkins and King (2010) አቀራረቦች ጠቃሚ ሊሆኑ ይችላሉ.
Ngati ofufuza kuchita nakweza kufunsa amasamala udindo akaphatikiza, osati makhalidwe munthu mlingo yekha, ndiye ikuyandikira mu King and Lu (2008) ndi Hopkins and King (2010) zikhonza kukhala zothandiza.