According to research by Kuhn, novices struggle with science ...

[sam.t96]

According to research by Kuhn, novices struggle with science because they
 
  a. lack relevant knowledge
  b. fail to use strategies
  c. fail to coordinate theory and data
  d. all of the above

Question 2

The ideal difficulty for an item in a standardized, norm-referenced multiple-choice test that has four alternatives with 15 in the high group and 15 in the low group would range between
 
  a. 0 and 25
  b. 30 and 40
  c. 60 and 65
  d. 80 and 100

[nathang24]

Answer to Question 1

d

Answer to Question 2

C

[sam.t96]

Thank you!

[nathang24]

Happy to help