Supplementary table 1
Items from Discrimination Measure

Item	Response type	Key	Response range	
In the past 12 months, have you felt discriminated against: because of your race, ethnicity, or color?  Definition of ethnicity: groups of people who have the same customs, or origin
	Yes/No 	0 No
1 Yes
	0-1	
In the past 12 months, have you felt discriminated against: because you are (or your family is) from another country?
	Yes/No	0 No
1 Yes
	0-1	
In the past 12 months, have you felt discriminated against: because someone thought you were gay, lesbian, or bisexual?
	Yes/No	0 No
1 Yes
	0-1	
In the past 12 months, have you felt discriminated against: because of your weight?
	Yes/No	0 No
1 Yes
	0-1	
How often do the following people treat you unfairly or negatively because of your ethnic background? Teachers
	Likert scale	1 almost never 
2 rarely
3 sometimes
4 often
5 very often 	1-5	
How often do the following people treat you unfairly or negatively because of your ethnic background? Other adults outside school
	Likert scale	1 almost never 
2 rarely
3 sometimes
4 often
5 very often	1-5	
How often do the following people treat you unfairly or negatively because of your ethnic background? Other students
	Likert scale	1 almost never 
2 rarely
3 sometimes
4 often
5 very often	1-5	
I feel that others behave in an unfair or negative way toward my ethnic group
	Likert scale	1 almost never 
2 rarely
3 sometimes
4 often
5 very often	1-5	
I feel that I am not wanted in American society
	Likert scale	1 almost never 
2 rarely
3 sometimes
4 often
5 very often	1-5	
I don't feel accepted by other Americans
	Likert scale	1 almost never 
2 rarely
3 sometimes
4 often
5 very often	1-5	
I feel that other Americans have something against me	Likert scale	1 almost never 
2 rarely
3 sometimes
4 often
5 very often	1-5	

Supplementary table 2
Scores of Discrimination Across Parent-reported Races. Average Reported Experiences of Discrimination Differed Across Races, F(17, 3,839) = 9.14, P < 0.001, partial η2 = .04

Parent reported race	Mean	Standard deviation	N	
American Indian	9.64	2.44	14	
Asian Indian	7.79	1.13	19	
Black	9.37	3.84	298	
Chinese	8.19	2.22	27	
Filipino	8.31	3.33	13	
Japanese	7.00	0	2	
Korean	7.50	0.84	6	
Latina/o/x non-white	8.91	3.14	190	
Multi-racial	8.46	2.79	357	
Other Asian	7.11	0.33	9	
Other Pacific Islander	7.00		1	
Other race	8.18	1.81	17	
Refuse to answer	8.33	0.82	6	
Samoan	7.00		1	
Unknown	8.46	2.53	197	
Vietnamese	8.20	1.64	5	
White	7.83	1.96	2,211	
Latina/o/x white	8.43	2.47	466	

Supplementary table 3
 Results for Analyses Only Including Discrimination Items Relevant for Race and Ethnicity (Excluding Discrimination due to Weight, or due to Being Gay, Lesbian or Bisexual)
Statistic	β	t	p	SEa	95% confidence intervalb	
Race/ethnicity discrimination and symptoms	
Psychotic-like experiences	0.252	15.969	<0.001	--	--	
Depression	0.129	5.955	<0.001	--	--	
Race/ethnicity discrimination and emotional stroop	
Percent correct	0.039	2.373	0.018	--	--	
Reaction time	0.008	0.469	0.639	--	--	
Race/ethnicity discrimination and emotional n-back	
Percent correct	-0.111	-5.831	<0.001	--	--	
Reaction time	0.008	0.437	0.662	--	--	
Mediation analysis for race/ethnicity discrimination and psychotic like experiences	
Emotional n-back	0.01	--	--	0.0023	0.0009-0.0099	
Emotional stroop	-0.0004	--	--	0.0008	-0.0023-0.0012	
Mediation analysis for race/ethnicity discrimination and depressive symptoms	
Emotional n-back	-0.0013	--	--	0.0026	-0.0071-0.0036	
Emotional stroop	0.0009	--	--	0.0015	-0.0021-0.0043	
a Sobel’s test of indirect effects bootstrap standard error based on 5000 bootstrap samples
b Sobel’s test of indirect effects bootstrap confidence intervals based on 5000 bootstrap samples