title: Undergraduate and Graduate Students' Combinatorial Reasoning and Formal Operations.
authors.affiliation: a University of Transkei , South Africa.
authors.forename: Tuntufye S
authors.initials: TS
authors.lastname: Mwamwenda
mesh_terms: D000328:Adult; D004500:Education, Graduate; D004522:Educational Status; D005260:Female; D006803:Human Development / Q000502:physiology*; D006801:Humans; D008297:Male; D013334:Students / Q000523:psychology*; D013850:Thinking / Q000502:physiology*; D014495:Universities; D055815:Young Adult