Originally published in 1974, the second volume of four (Logical Inference: Underlying Operations) provides a process-model for the solution of certain syllogis

Originally published in 1975, this volume (3 of 4) presents an expanded model of certain deductive abilities in children and adults. A partial explanation of th

Logical Abilities in Children (4 Volume set), was originally published between 1974 and 1976 to critical acclaim. Now available again as individual titles or a

Originally published in 1974, a wide and interesting set of intellectual abilities in children are examined here. Volume 1 of 4 (Organization of Length and Clas

Psychology of Learning and Motivation