When on the surface, a study or scale appears to be intuitively valid it has ______ validity.

Light waves from a blue shirt stimulate different photoreceptors than light waves coming from a red shirt. The fact that we see these shirts as two different colors can be explained by _____

a. trichromatic theory b. hyperopia c. opponent process theory d. motion parallax

Pretend play is an important component of which of Erikson's psychosocial dilemmas?

a. trust versus mistrust b. autonomy versus shame and doubt c. initiative versus guilt d. industry versus inferiority