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ERIC Number: EJ978835
Record Type: Journal
Publication Date: 2012-May
Pages: 11
Abstractor: As Provided
Reference Count: N/A
ISSN: ISSN-0034-5237
The Leading Group Effect: Illusionary Declines in Scholastic Standard Scores of Mid-Range Japanese Junior High School Pupils
Mori, Kazuo; Uchida, Akitoshi
Research in Education, v87 n1 p64-74 May 2012
Longitudinal change in the average Z scores for four groups of pupils sorted by quartiles was examined for its stability over three years. The data, collected from 1998 to 2009, was obtained from nine cohorts of Japanese junior high school pupils totaling 1,962 subjects. It showed illusionary declines among the mid-range pupils but improvements among those in the low-range group. These illusionary declines and improvements were found to stem from the fact that left-skewed distributions for the first term examination scores became less skewed for later exams. Such illusionary declines, dubbed the "leading group effect", may undermine the motivation of middle-range pupils. This illusionary statistical phenomenon should be appropriately explained to teachers and pupils of junior high schools so they won't be discouraged by illusionary declines in the Z scores.
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Publication Type: Journal Articles; Reports - Research
Education Level: Elementary Secondary Education; Junior High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Japan