References
- Annett , M. 1959 . The classification of instances of four common class concepts by children and adults . Brit. J. Educ. Psychol. , 29 : 223 – 236 .
- Braine , M. 1959 . The ontogeny of certain logical operations: Piaget's formulation examined by nonverbal methods . Psychol. Monog. , 73 ( 5 ) Whole No. 475
- Davey , A. 1968 . The Tristan Da Cunhan children's concepts of equivalence . Brit. J. Educ. Psychol. , 38 : 162 – 170 .
- Elkind , D. 1961 . The development of the additive composition of classes in the child; Piaget replication study III . J. Genet. Psychol. , 99 : 51 – 57 .
- Elkind , D. 1968 . “ Children's discovery of the conservation of mass, weight, and volume: Piaget replication study II ” . In Logical Thinking in Children , Edited by: Hooper , F. H. and Sigel , I. E. New York : Holt, Rinehart & Winston .
- Guthrie , G. M. , Tayag , A. H. and Jacobs , P. J. 1969 . The Philippine Nonverbal Intelligence Test , Goshen, N. Y. : Research Psychologists Press .
- Hunt , E. and Hovland , C. 1960 . Order of consideration of different types of concepts . J. Exper. Psychol. , 59 : 220 – 225 .
- Inhelder , B. and Piaget , J. 1964 . The Early Growth of Logic in the Child , New York : Harper & Row .
- Komachiya , M. 1957 . A note of concept attainment . J. of Psychol. , 43 : 261 – 263 .
- McGaughran , J. 1954 . Predicting language behavior from object sorting . J. Abn. & Soc. Psychol. , 49 : 183 – 195 .
- McGaughran , L. and Wylie , A. 1969 . Continuity in the development of conceptual behavior in preschool children . Devel. Psychol. , 1 : 181 – 192 .
- Olver , R. and Hornsby , J. 1966 . “ On equivalence ” . In Studies in Cognitive Growth , Edited by: Bruner , J. S. New York : Wiley .
- Price-Williams , D. R. 1962 . Abstract and concrete modes of classification in a primitive society . Brit. J. Educ. Psychol. , 32 : 50 – 61 .
- Thompson , J. 1941 . The ability of children of different grade levels to generalize on sorting test . J. of Psychol. , 11 : 119 – 126 .
- Wieman , R. 1970 . The effects of age and cultural familiarity on children's categorization responses , The Pennsylvania State University Graduate School . Unpublished Master's thesis