The third paper of a series on intellective factors in learning mathematics, critical reviews of research concerned with variables that influence mathematical ability are presented here. (Author/KM)

Investigated was the relationship between proportional thinking and students' ability to demonstrate knowledge and understanding of concepts related to simple machines, structure of matter, and equivalent fractions. The study involved a random sample of 136 ninth-grade physical science students. Each student's proportional reasoning skills were…

The relationship between trial-to-trial changes in free recall and eight intelligence and memory abilities was investigated in a sample of 72 college students. Despite identical acquisition curves under immediate and delayed recall, differences between the two groups in correlational pattern between recall performance and abilities were striking.…

Adjunct questions are test-like items interspersed at regular intervals, preceding or following prose passages, with the intention of increasing subsequent learning. In this state-of-the-art review, studies which include three major variables--age, ability, and question complexity level--are examined to determine whether a particular combination…