Table 2.

The cognitive performance test

Question	Reflective & correct answer	Intuitive & incorrect answer	Non-intuitive & incorrect answers
1) A bat and a ball cost £1.10 in total. The bat costs £1.00 more than the ball. How much does the ball cost?	5 pence	10 pence	1 or 9 pence
2) If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?	5 minutes	100 minutes	20 or 500 minutes
3) In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?	47 days	24 days	12 or 36 days
4) All living things need water. Roses need water. If these two statements are true, can we conclude from them that roses are living things?	No	Yes	NA
5) Claire is 31 years old, single, outspoken and very bright. She majored in philosophy. As a student, she was deeply concerned with issues of discrimination and social justice, and also participated in anti-nuclear demonstrations. Which is more probable?	Claire is a bank teller	Claire is a bank teller and is active in the feminist movement	NA

Table describes the questions and multiple choices on the Cognitive Performance Test (CPT). The first three questions, taken from the Cognitive Reflection Test, had one “reflective & correct,” one “intuitive & incorrect,” and two “non-intuitive & incorrect” answers. The last two questions, using standard belief bias and conjunction fallacy items, had one “reflective & correct” and one “intuitive & incorrect” answer