The retinex theory of color vision attempts to explain which of these?

All of the following statements about social play are supported by research except

a. mothers are more likely than fathers to use play as an opportunity for teaching infants about words and routines b. play with peers and siblings appears to be universal and begins at a very early age c. adult-infant play often consists of singing games with hand and arm movements d. there are few cross-cultural differences in the way that parents play with their infants

The heritability index (h8), which Arthur Jensen estimated as approximately .80 for intelligence,

is equal to A) variance due to environment/variance due to heredity. B) variance due to heredity/variance due to heredity and environment. C) variance due to heredity/variance due to environment. D) variance due to environment/variance due to heredity and environment.