References
- Berlyne , D. E. 1960 . Conflict, Arousal and Curiosity , New York : McGraw-Hill .
- Goldberg , S. and Lewis , M. 1969 . Play behavior in the year-old infant: Early sex differences . Child Devel. , 40 : 21 – 31 .
- Hutt , C. 1970 . Curiosity in young children . Sci. J. , 6 : 68 – 71 .
- Rabinowitz , M. F. , Moely , B. E. , Finkel , N. and McClinton , S. 1975 . The effects of toy novelty and social interaction on the exploratory behavior of preschool children . Child Devel. , 46 : 286 – 289 .