*4.1. Cognitive Reflection Test Results*

On average, the subjects answered 2.1 of the items on the CRT correctly. Of the 236 subjects, 48.7% answered all three items correctly, 24.2% answered two correctly, 14.4% answered one correctly and 12.7% did not answer any of the three items correctly. 9% of the subjects opted for the *intuitive* incorrect answer in all three items, 23.3% chose the *intuitive* answer in at least two items and 45.8% chose the *intuitive* incorrect answer at least once.

The *reflective* group consists of 172 subjects. The *intuitive* group consists of 56 subjects. The residual group consists of 8 subjects. As the residual group consists only of 8 subjects, these are grouped with the *intuitive* subjects throughout the statistical analysis. Therefore, the analyses mainly compares those *reflective* to those not *reflective.* The *non-reflective* group consists therefore of 64 subjects. Excluding the residual group, and thereby comparing the *reflective* to the *intuitive* subjects, does not change conclusions. (See Appendix D (Tables A1–A6, Figures A1–A5) for a summary of the findings excluding the residual group).

Men performed better in the CRT by answering an average of 2.3 items correctly compared to women with an average of 1.84 correct answers. This difference is statistically significant (*p* = 0.003, MWU2). The distribution of the answers can be found in Appendix E (Tables A7–A11).

In the following subsections, I will present the results for each of the tasks in the experiment. A graphical representation of the frequency of decisions consistent with rational, self-interested behavior by *non-reflective (reflective)* individuals can found in Figure 1. A more detailed presentation of decisions in each task can be found in Appendix F (Tables A12–A16, Figures A6–A9).

**Figure 1.** Frequency of Decision by Non-Reflective (Reflective) Individuals.

<sup>2</sup> Mann-Whitney-U: Note that the MWU is a test of differences in distribution.
