Jim and John are both 17 and are 6 feet tall. What do we know about these young men and/or the ...

Jim and John are both 17 and are 6 feet tall. What do we know about these young men and/or the timing of the growth spurt for each?
 
  a. They both experienced the growth spurt early.
  b. They both experienced the growth spurt late.
  c. They are very likely to be biologically related.
  d. We know nothing about the growth spurt of these young men.

Question 2

What is the implication of a child repeating an action simply to see the action?
 
  a. The child finds the action self-reinforcing. c. Stimulation is a basic drive.
  b. The child finds the stimulation satisfying. d. All of these are implications.

Question 3

Which of the following is true about the timing of the growth spurt and height at maturity?
 
  a. Children who spurt early tend to be long-legged.
  b. Children who spurt late are somewhat short-legged.
  c. Those who spurt early tend to end up taller at maturity.
  d. none of these

Question 4

In which substage of sensorimotor development would you first witness goal-directed behavior?
 
  a. simple reflexes c. primary circular reactions
  b. secondary circular reactions d. tertiary circular reactions