This paper deals with quantitative evaluation of the effects of erroneous performance by stemming and similar clustering algorithms in information retrieval systems. (Author)

Two studies involving 242 college students are described. First, a 15-item test on means was given, identifying students' misconceptions. In the experiment that followed, most students were able to acquire the appropriate schema of statistical concepts by engaging in diagnostic activities embedded in a feedback-corrective procedure. (MNS)

The accuracy of deaf adults' letter report was greater for real and nonsense words than for pseudowords, and error analysis shows deaf adults tend to produce orthographically regular responses. These findings indicate clearly the use of orthographic structure in word recognition. (MSE)

By handling numbers in unexpected ways, computers and calculators create headaches for computer programers and set traps for unsuspecting users by sometimes producing wrong answers. Specific examples of such computer/calculator errors are discussed. (Author/JN)

Two competing theories of social facilitation, one stressing audience presence and the other stressing the threat of evaluation, were tested to determine their efficacy in predicting oral reading performance of 24 academically handicapped children (9- to 12-year-olds). (Author)

Presents study exploring oral reading errors of normally developing readers to determine any developmental differences in learning phoneme-grapheme units; to discover if the grapheme representations of some phonemes are more difficult to read than others; and to replicate results reported by Fowler, et. al. Findings show most oral reading errors…

Examined observer error in attitude attribution. Subjects appeared to have invested essays, written under assignment, with diagnostic value on the presumption of a correlation between the strength of the essay and the writer's attitude. Suggests that attribution error is based on the inclination to adopt a diagnostic judgmental set. (Author)

Tests the effects of stimulus variability on overgeneralization and overdiscrimination errors in children and adults. The subjects (n=64), adults and five-, seven-, and nine-year-old children, participated in a visual discrimination task. (CM)

Methods developed by Newman and Casey for analyzing errors by children attempting verbal arithmetic problems are described. Emphasis is given to Newman's hierarchy of error causes. Data obtained by Newman, Casey, and Clements show a large proportion of errors by children are in categories…