How computers have affected diagnosis in mathematics is discussed. A distinction is made between errors and mistakes, followed by consideration of computers as a diagnostic tool. The development of algorithms to diagnose errors and of models of student performance is described. (MNS)

Considered are concept development and errors in using both Logo and BASIC made by 25 prospective teachers in a computer literacy course. Understanding errors that students exhibit in programing may affect the ways mathematics teachers understand the process of learning structured content like mathematics. (MNS)

This study with 28 Netherlands children (mean age 9 years, 7 months) with written language disorders found that copying words from the computer screen resulted in significantly fewer spelling errors on the posttest than writing words from memory and that both these forms of practice led to fewer spelling errors than only reading the words.…

A computer program named BUGGY is described. The program is designed to duplicate "traditional" student mathematical mistakes; pupils are to identify the nature of the errors the computer makes. (MP)

Discussion of programs for analyzing the writing of students using word processors focuses on six categories of available software that can help to improve students' writing skills: error checkers, reformatters, audience awareness programs (including reader's needs and readability formulas), student conferencing utilities, grading utilities, and…

Eleven learning-handicapped students, ages 8-13, generated text at microcomputers both alone and as members of dyads. Examination of mechanical errors revealed a lower error rate in the dyad condition compared to working alone. The relationship between error monitoring and the social interaction needed for collaboration is discussed. (Author/JDD)

A student was observed practicing arithmetic with a computer-assisted instruction (CAI) system. She enjoyed practice and believed that it helped. However, she consistently failed to solve problems on the computer that she could do with pencil and paper. This paper suggests reasons for her problems and draws implications for CAI. (Author/PK)