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. 2012 Jun 7;3:162. doi: 10.3389/fpsyg.2012.00162
Item Factor 1 Factor 2
George bought two pizzas that had six slices each. How many total slices did George have to share with his friends? 0.30 0.44
Is this right? 9 + 7 = 18 0.77 0.08
How much money does Annie have if she has two dimes and four pennies? 0.63 0.26
How do you write the number four hundred and eighty two? 0.52 0.17
Draw an hour and minute hand on a clock so that it would read 3:15 PM 0.39 0.27
Draw a triangle and a square on the board 0.65 0.16
Count aloud by 5 s from 10 to 55 0.34 0.43
What time will it be in 20 min? 0.24 0.43
Is this right? 15 − 7 = 8? 0.71 0.07
Daisy has more money than Ernie. Ernie has more money than Francesca. Who has more money – Daisy or Francesca? 0.65 0.18
You are in math class and your teacher is about to teach something new 0.14 0.70
You have to sit down to start your math homework 0.57 0.18
You are adding up all the money in your piggy bank −0.27 0.59
Someone asked you to cut up an apple pie into four equal parts 0.01 0.53
You are about to take a math test 0.38 0.50
You are in math class and you do not understand something. You ask your teacher to help you 0.28 0.56
Your teacher gives you a bunch of addition problems to work on 0.33 0.54
Your teacher gives you a bunch of subtraction problems to work on 0.29 0.56
You are in class doing a math problem on the board 0.30 0.58
You are listening as your teacher explains to you how to do a math problem 0.38 0.32

Bolded numbers refer to items that load on that factor.