TY  - JOUR
PY  - 1963//
TI  - Inheritance of behavior in infants
JO  - Science
A1  - Freedman, D. G.
A1  - Keller, B.
SP  - 196
EP  - 198
VL  - 140
IS  - 3563
N2  - Mental and motor abilities and personality development were studied in 20 pairs of infant twins of the same sex on a monthly basis in their first year, that is, before mutual imitation becomes a factor. Blood group determinations, made after the study was completed, revealed an N(1) of 11 fraternal and N(2) of 9 identical pairs. Within-pair differences were significantly greater within fraternal pairs on all tests and rating scales.<p /> <p>Language: en</p> 
LA  - en
SN  - 0036-8075
UR  - http://dx.doi.org/
ID  - ref1
ER  -