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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

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Peer reviewed Peer reviewed
ERIC Number: EJ249098
Record Type: CIJE
Publication Date: 1980-Dec
Pages: N/A
Abstractor: N/A
Reference Count: 0
The Effect of Type of Superordinate Class and Size of Array on Class-Inclusion Performance.
Majeres, Raymond L.; O'Toole, Jean
Journal of Genetic Psychology, v137 n2 p257-65 Dec 1980
Class inclusion problems differing in size of the array and in superordinate class were given to 84 boys and girls in grades 1 through 4 in a first experiment, and 41 boys and girls in grades 3 and 4 in a second experiment. The experiments sought to determine performance variables explaining the developmentally late appearance of class-inclusion relative to conservation. (Author/CM)
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: N/A