The fact that coos sound the same regardless of whether the young ...

[storky111]

The fact that coos sound the same regardless of whether the young infant can hear suggests that they
 
  a. convey self-generated meanings for adult listeners.
  b. develop with maturation of the brain and vocal organs.
  c. are a reflection of the parents' recasts and extensions.
  d. arise from the infant's mutual exclusivity constraint.

Question 2

The confidentiality principle of research ethics requires that this information be kept secret:
 
  a. the researchers' hypotheses.
  b. subjects' names and individual results.
  c. insurance policies held by the laboratory.
  d. results of unnamed groups of subjects.

[Andromeda18]

Answer to Question 1

B

Answer to Question 2

B

[storky111]

Excellent

[yeungji]

Gracias!