Moving matchsticks to form true arithmetic statements illustrates that successful solutions require ...

Moving matchsticks to form true arithmetic statements illustrates that successful solutions require overcoming
 
  a. limited capacity STM. c. self-imposed constraints.
  b. functional fixedness. d. All these

Question 2

Insight
 
  a. is a form of discovery.
  b. usually occurs after repeated unsuccessful solutions.
  c. occurs suddenly.
  d. All of these

Question 3

Metcalfe found that subjects' ratings revealed that they thought they were not making progress until the very end when solving
 
  a. arrangement problems. c. transformation problems.
  b. inducing structure problems. d. analogies.