Stage 4 sleep is marked by mostly _________ waves

Which researcher developed an intelligence test that normed its scores according to the concept of normal distribution?

a. David Wechsler b. Alfred Binet c. Lewis Terman d. Sir Francis Galton

Until about one year of age, infants respond similarly to the basic sounds used in all languages. After that, they can detect subtle differences in language sounds only in their native language. Which of the following theories best supports this phenomenon?

A) canalization B) experiential canalization C) genetic determinism D) probabilistic epigenesis