References
- Beilin , H. 1965 . Learning and operational convergence in logical thought development . J. Exper. Child Psychol. , 2 : 317 – 339 .
- Bittner , A. C. and Shinedling , M. M. 1968 . A methodological investigation of Piaget's concept of conservation of substance . Genet. Psychol. Monog. , 77 : 135 – 165 .
- Dodwell , P. C. 1961 . Children's understanding of number concepts: Characteristics of an individual and of a group test . Can. J. Psychol. , 15 : 29 – 36 .
- Gelman , R. 1969 . Conservation acquisition: A problem of learning to attend to relevant attributes . J. Exper. Child Psychol. , 7 ( 2 ) : 167 – 187 .
- Goldschmid , M. L. 1967 . Different types of conservation and non-conservation and their relation to age, sex, IQ, MA, and vocabulary . Child Devel. , 38 ( 4 ) : 1229 – 1246 .
- McNemar , Q. 1969 . Psychological Statistics, , 4th ed. , New York : Wiley .
- Nelson , P. J. 1970 . An investigation of a group test based on Piaget's concepts of number and length conservation and its ability to predict first-grade arithmetic achievement , Ann Arbor , Mich. : University Microfilms . (Doctoral dissertation, Purdue University)
- O'bryan , K. G. 1969 . Eye-movements: Their relationship to the development of conservation of length, area, and continuous quantity Doctoral dissertation, The University of Alberta, Edmonton, Alberta, Canada
- Piaget , J. , Inhelder , B. and Szeminska , A. 1960 . The Child's conception of Geometry , New York : Harper Torchbooks .
- Rothenberg , B. B. 1969 . Conservation of number amoung fourand five-year-old children: Some methodological considerations . Child Devel. , 40 ( 2 ) : 383 – 406 .
- Rothenberg , B. B. and Courtney , R. G. 1969 . A developmental study of nonconservation in young children . Merrill Palmer Quart. Behav. & Devel. , 15 ( 4 ) : 363 – 373 .
- Uzgiris , I. C. 1964 . Situational generality of conservation . Child Devel. , 35 ( 3 ) : 831 – 841 .
- Wheatley , G. H. 1971 . Feasibility of group testing of Piagetian conservation concepts Unpublished manuscript, Purdue University
- Wheatley , G. H. August 1972 . “ Concept formation ” . In The development of new measures of cognitive variables inelementary school children (Phase II) August , Final Report, Contract No. OEC-0-70-4952, U. S. Department of Health, Education, and Welfare, Office of Education, Bureau of Elementary and Secondary Education.
- Wheatley , G. H. and Nelson , R. J. 1968 . Characteristics of a group administered static conservation test Unpublished Research, Purdue University, Lafayette, Indiana
- Winer , B. J. 1971 . Statistical Principles in Experimental Design, , 2nd ed. , New York : McGraw-Hill .
- Zimiles , H. 1963 . A note on Piaget's concept of conservation . Child Devel. , 34 ( 3 ) : 691 – 695 .