Culturally Smart Relationships Study

Mentor report - Empathic Feeling and Expression Subscale from Ethnocultural Empathy Scale (Wang et al., 2003) - 15 items - mean scores range from 1 to 6; 2 reversed scores items; higher scores reflect higher empathic feeling and expression

Mentor report - 6-item scale (Anderson et al., 2018) - mean scores range from 1 to 4; higher scores reflect higher self-efficacy

Mentor report - 4-item scale created for this study (Sánchez et al., 2021) - mean scores range from 1 to 4; higher scores reflect higher self-efficacy

Mentor report - Adapted measure of Multicultural awareness, knowledge and skills scale (D'Andrea et al., 2003) - 13 items. Items were added and adapted to reflect the current intervention. Mean scores range from 1 to 4. Higher scores reflect higher perceived knowledge.

Mentor report - Unawareness of Racial Privilege subscale of the Color-Blind Racial Attitudes Scale (CoBRAS; Neville et al., 2000) - 7 items - Mean scores range from 1 to 6; 6 items are reverse scored; higher scores reflect more unawareness of racial privilege

Youth reported scale (Sanchez et al., 2018) - adapted for the current study and added 5 items for a total of 11 items - 1 reversed scored item; Mean scores range from 1 to 4; higher scores indicate more support from mentors on youth's ethnic/racial identity.

Youth-reported 8-item scale created for this study (Sanchez, Herrera, DuBois, & Anderson, 2021); 3 reversed scored items; mean scores range from 1 to 4; higher scores indicate more support from mentors on youth's coping with discrimination.

Youth reported - Youth Centered Relationships Subscale of Youth Survey - 5 items. Youth-reported scale; mean scores range from 1 to 4; higher scores indicate a more youth-centric mentoring relationship.

Mentor reported - 11-item scale created for this study (Sanchez, Herrera, DuBois, & Anderson, 2021). Mean scores range from 0 to 3; Higher scores indicate more frequent engagement in activities and discussions about race and social justice.

Youth reported - 11-item scale created for this study (Sanchez, Herrera, DuBois, & Anderson, 2021). Mean scores range from 0 to 3; higher scores indicate more frequent engagement in activities and discussions about race and social justice.

mentor reported - 6-item scale created for this study (Sanchez, Herrera, DuBois, & Anderson, 2021). Mean scores range between 0 and 3. Higher scores reflect more frequent racial/ethnic socialization activities and discussions.

Mentor reported scale - 7 item scale(Pryce & Deane, 2019). Mean scores range between 1 and 6. Higher scores reflect higher mentor attunement.

Youth reported scale - MAS-Y; Pryce & Deane, 2019; 15 items. Mean scores range from 1 to 6; higher scores indicate higher mentor attunement.

Mentor Reported Challenges Scale - 3 items (Herrera et al., 2014); mean scores range between 1 and 4; higher scores reflect more cultural clashes in the relationship.

Youth reported - Interpersonal Trust Scale (DuBois, 2006) - 5 items. modified some items and response scale for this study; 1 reversed scored item; mean scores range between 1 and 4; higher scores reflect more trust towards adults.

Youth reported measure; Whitlock, 2007; 5 items; modified the response scale for this study; 1 reversed scored item; mean scores range from 1 to 4; higher scores reflect higher community connectedness.

Youth reported measure; Sense of Mattering Scale (Rosenberg, 1981) - 5 items - modified items and response scale for this study; mean scores range from 1 to 4; higher scores reflect higher perceptions that youth matters to adults outside their family.

youth reported - Private Regard Subscale of the Multidimensional Inventory of Black Identity- Teen (MIBI-T) - 3 items (Scottham, Sellers, & Nguyen, 2008; Rivas-Drake, Hughes, & Way, 2009); mean scores range from 1 to 4; higher scores reflect more positive perceptions about one's ethnic/racial group.

youth reported - o Public Regard Subscale of the Multidimensional Inventory of Black Identity- Teen (MIBI-T) - 3 items (Scottham, Sellers, & Nguyen, 2008; Rivas-Drake, Hughes, & Way, 2009); mean scores range from 1 to 4; higher scores reflect more positive societal perceptions about one's ethnic/racial group.

youth reported - Ethnic Identity Scale - exploration subscale Brief - 2 items (Douglass & Umaña-Taylor, 2015); mean scores range from 1 to 4; higher scores reflect higher engagement in activities that explore one's ethnic/racial group

youth reported - affirmation subscale brief - 3 items (Douglass & Umaña-Taylor, 2015); all items are reversed scored; mean scores range from 1 to 4; higher scores indicate higher affirmation about one's ethnic/racial group

youth reported - 3 items adapted for this study (Sandler et al., 2000; Sanchez et al., 2017); mean scores range from 1 to 4; higher scores indicate higher efficacy in coping with racial discrimination.

Youth reported - Cultural Mistrust Inventory for Adolescents (Terrell & Terrell, 1981) - cultural mistrust in interpersonal relationships subscale modified by Sanchez & DuBois (2006) - 11 items; 5 reversed scored items; mean scores range from 1 to 4; higher scores indicate more cultural mistrust towards White people

Mentor reported - Bias Awareness Scale (Perry et al., 2015) - 4 items - response scale was adapted; one item is reversed scored; mean scores range from 1 to 6; higher scores indicate higher awareness of bias.

Mentor reported - Social Justice Interest subscale of the Social Issues Questionnaire (Miller et al., 2009) - 6 items - adapted for the current study to assess mentor's interest in engaging in social justice activities with their mentee; mean scores range from 1 to 9; higher scores indicate higher interest in engaging in social justice activities with mentees.

Youth reported scale - Level of Adolescent Voice Scale (Harter, 2000) - with 13 items (3 were added by current investigators); 8 reversed scored items; mean scores range from 1 to 4; higher scores indicate that youth are able to be their authentic self around the mentors.

Mentor reported scale - Match Characteristics Questionnaire - Closeness subscale - 5 items (Harris & Nakkula (2004). Mean scores range between 1 and 6; higher scores reflect closer mentoring relationships.

youth reported scale - Relational Satisfaction Subscale (Harris & Nakkula, 2004) - 6 items; mean scores range between 1 and 4; higher scores reflect closer mentoring relationships.

Satisfaction Subscale of the Investment Model Scale - 5 items (Rusbult et al., 1997; see Drew et al., 2020); mean scores range from 1 to 4; higher scores indicate greater perceived mentee support-seeking behaviors.

Youth Report of Measure of Growth/Goal Focus in Youth Mentoring Relationships (DuBois, 2008) - 6 items; mean scores range between 1 and 4; higher scores reflect more growth/goal focus in mentoring relationship

mentor reported - Mentoring Processes Scale (MPS) - 6 items (Tolan et al., 2020); 1 reversed scored item; mean scores range from 1 to 4; higher scores indicate higher mentor advocacy for mentees.

mentor reported - Mentee Support Seeking Scale - 4 items (Karcher et al., 2005); mean scores range from 1 to 4; higher scores indicate more mentee support-seeking behaviors perceived by mentors.

Mentor reported - Adapted Activity Log - 4 items (Karcher et al., 2010); mean scores range from 1 to 5; higher scores reflect more frequent mentoring activities.

Duration of mentor-youth relationships gathered from case records; duration is reported in number of months.

Youth self-reported grades for 4 subjects: math, reading, social studies and science. A through F scale

Youth - behaviors that youth has gotten in trouble for in the last 3 months: substance use (4 items - adapted from Clasen, Brown, & Eicher (1986), status offenses (3 items - created for this survey), school discipline (4 items - adapted from Vandell et al. (2013)); o In the past 3 months, I got in trouble or could have gotten in trouble for… Responses are a 3-point scale: 0 times, 1 or 2 times, 3 or more times (0 to 2 scale). Higher mean scores reflect more risky behaviors.

o In the past 3 months, I got in trouble or could have gotten in trouble for…Responses are a 3-point scale: 0 times, 1 or 2 times, 3 or more times.

Youth reported - In the past month, I got in trouble for or could have gotten in trouble for…adapted from Bosworth, Espelage, & Simon (1999) and Dahlberg, Toal, & Behrens (1998).

5 items - Responses are on 3 point scale (0 times, 1 or 2 times, 3 or more times; 0 to 2 scale); higher mean scores reflect more risky behaviors Responses are on 3 point scale (0 times, 1 or 2 times, 3 or more times)

Youth reported - "In the past 3 months, I:" Responses are on a 2-point scale (Yes = 1, No = 0); Higher sum score reflect more police and juvenile justice contact.

3 items

Youth reported - Adapted from the Middle School Youth Survey, originally from Prior et al. (2000); Responses are on a 4-point scale (Not at all true, A little true, Mostly true, Totally true); Mean responses range from 1 to 4 with higher scores reflecting higher emotional regulation.

4 items

Youth reported - Taken from the Health Measures' PROMIS Pediatric Depressive Symptoms instrument (2013). Responses are on a 5-point scale (Never, Almost Never, Sometimes, Often, Almost Always); 2 reversed scored items; Mean responses range from 1 to 5 with higher scores reflecting more depressive symptoms 10 items

youth reported - Loneliness Questionnaire-Short Version (Ebesutani et al., 2012) - 9 items; modified the response scale; mean scores range from 1 to 4; higher scores mean higher loneliness.

Youth reported - Abbreviated Version of the Hopeful Future Expectations (HFE) Scale (Callina et al., 2016) - adapted - 8 items; 1 reversed scored item; mean scores range between 1 and 5; higher scores mean more hopeful future.

Youth reported - Critical Reflection Subscale; Diemer et al., 2020) - 3 items; modified the response scale and excluded a survey item for this study; mean scores range between 1 to 4; higher scores mean higher level of critical analysis of socioeconomic and racial/ethnic inequalities.

Youth reported - (Kay & Jost, 2003) - 10 items - adapted the response scale for this study; mean scores range between 1 to 4; higher scores mean stronger beliefs that the world is a fair and just place.

Youth reported - Critical Agency Subscale; Critical Behavior Subscale; McWhirter & McWhirter, 2016) - 10 items; modified response scale for this study; mean score range between 1 to 4; higher scores mean higher critical agency and behavior.

Youth reported - Revised Implicit Theories of Intelligence (Self-Theory; DaCastella & Byrne, 2015) Scale - 8 items; adapted the response scale for this study; mean scores range between 1 to 4; higher scores mean higher academic growth mindset

Youth reported - Academic Self-Efficacy Subscale-Patterns of Adaptive Learning Scale (Midgley et al., 2000) - 5 items; mean scores range between 1 and 4; higher scores mean higher academic self-efficacy.