Table 3. Unidimensional Factor Structure of the Decision Fatigue Scale (N=101).

Items	Factor 1
5. It takes too much effort to make decisions.	.84
2. Making decisions is difficult because I can't concentrate.	.74
10. My mood has made it difficult for me to make decisions.	.72
3. It is hard for me to take in information and use it to make decisions.	.70
I can't make a decision because I am too tired and stressed.	.67
8. I can't make up my mind about which option is best.	.63
4. I don't have enough confidence in myself to make good decisions.	.58
6. Someone else should make decisions for me.	.57
9. I have made decisions without carefully thinking about them.	.42

Note. Extraction method was principal axis factoring with oblique rotation (direct oblimin rotation using the following parameters: δ = 0, κ = 4). According to a priori criteria for item retention, Item seven, “I have made decisions quickly in order to move on,” was removed. The internal consistency reliability (Cronbach's alpha) is 0.87 for the 9-item version of the Decision Fatigue Scale.