Table 1.

Demographic Characteristics of the Sample

Demographic Variable	M	SD	Range
Gender (% Female)	65.1	-	-
Race (% White)	78.1	-	-
Ethnicity (% non-Hispanic)	86.5	-	-
Age	19.63	2.69	18, 38
Sleep last night (hours)	7.15	1.46	3, 11
Medication (% yes)	15.6	-	-
Loss of consciousness (% yes)	25.5	-	-

Note: “Medication” was a yes/no response to the question Are you currently taking any prescription medication of psychological or mood problems, such as depression, anxiety, mood disorder, bipolar disorder, or ADHD?. “Loss of consciousness” was a yes/no response to the question Have you ever been unconscious for more than a few seconds (i.e., head injury or fainting)? See supplemental Figure S3 for analyses excluding individuals who responded yes to these questions.