. Author manuscript; available in PMC: 2021 Mar 1.

Published in final edited form as: J Abnorm Child Psychol. 2020 Mar;48(3):391–406. doi: 10.1007/s10802-019-00603-9

Table 2.

SCT Symptoms with Convergent Validity on the SCT Factor and Discriminant Validity with the ADHD-Inattention Factor

1. My mind feels like it is in a fog

2. I stare off into space

3. I feel sleepy or drowsy during the day

4. I daydream

5. I lose my train of thought

6. I get lost in my own thoughts

7. I get tired easily

8. I forget what I am going to say

9. I feel confused

10. I zone or space out

11. My mind gets mixed up

12. My thinking seems slow or slowed down

13. I have a hard time putting my thoughts into words

Note. The sluggish cognitive tempo item “I am slow at doing things” had a low (< .50) loading on the SCT factor and a high (> .30) loading on the ADHD-IN factor. The sluggish cognitive tempo item “I am not very active” had a low (< .38) loading on the SCT factor. Given the lack of validity for these two items, these two items were not used to define the SCT construct. ADHD-IN = attention-deficit/hyperactivity disorder-inattention; SCT = sluggish cognitive tempo.