This paper reports on the first stage of a research project still in progress aiming at identifying undergraduate students' difficulties and errors in solving linear algebra problems. Some students' difficulties related to very basic notions of vector space theory are shown and discussed with respect to both Balacheff's theory of conceptions and…

The National Assessment of Educational Progress (NAEP) collects data in the form of repeated, discrete measures (test items) with hierarchical structure for both measures and subjects, that is complex by any standard. This complexity has been managed through a "divide and conquer" approach of isolating and evaluating sources of…

The Suvag Lingua is a machine used to facilitate better aural perception by working from and on the basis of a student's error in producing a particualr sound and adapting the model which is to be imitated. (DD)

Based on a paper given at the Fourth Annual Conference of the International Association of Teachers of English as a Foreign Language, London, England, December 29, 1970 to January 2, 1971. (RS)

A level prediction task, in the context of Piaget's conservation-of-liquid problem, was used to analyze the regularities of incompetence'' in the nonconserving or noncompensating child. (Author)

This experiment investigated performance on a reasoning task in which the subjects had to say which of four half-hidden cards they needed to see fully in order to determine the truth or falsity of a conditional sentence. (Authors)

Examines some historical facts surrounding Thorndike's 1917 article, Reading as Reasoning: A Study of Mistakes in Paragraph Reading," (republished in Reading Research Quarterly, 1971, 6, 425-48), in an attempt to put the article in its proper perspective both as a research study and as a contribution to the psychology of reading. (VJ)