References
- Barna , J. D. and O'Connell , D. C. 1967 . Perception of horizontality as a function of age and stimulus setting . Percept. & Motor Skills , 25 : 70 – 72 .
- Beilin , H. , Kagan and Rabinowitz , R. 1966 . Effects of verbal and perceptual training on water level representation . Child Devel. , 37 : 317 – 329 .
- Ford , L. H. Jr. 1970 . Predictive versus perceptual responses to Piaget's water-line task and their relation to distance conservation . Child Devel. , 41 : 193 – 204 .
- Piaget , J. and Inhelder , B. 1956 . The Child's Conception of Space , London : Routledge & Regan Paul .
- Rebelsky , F. 1964 . Adult perception of the horizontal . Percept. & Motor Skills , 19 : 371 – 375 .
- Robertson , A. , de Shazo , A. and Youness , J. 1969 . Anticipatory visual imagery in deaf and hearing children . Child Devel. , 40 : 123 – 135 .
- Smedslund , J. 1963 . The effect of observation of children's representation of the spatial orientation of a water surface . J. Genet. Psychol. , 102 : 195 – 201 .
- Warner , W. L. 1960 . Social Class in America , 140 – 141 . New York : Harper & Row .