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Background: Women and under-represented minority (URM) students continue to be under-represented in STEM and earn the lowest proportion of undergraduate engineering degrees. We employed a mixed methods research approach grounded in social capital theory to investigate "when" they first consider pursuing engineering as a college degree major, "who" influences this decision, and "how" the influence occurs. First, we surveyed 2186 first-year undergraduate students entering engineering programs at 11 universities in the U.S. during the fall of 2014. Next, we interviewed a subsample of 55 women and URM students. Results: Survey findings indicated that women were more likely than men to consider pursuing engineering while in high school, before admission into college, or while in college rather than considering it earlier in their education. Black and Latinx students were more likely than white students to consider pursuing engineering after high school. In addition, Black and Latinx students were more likely than white students to identify a school counselor (rather than a family member) as having the most influence on their engineering academic and career decisions. In interviews, women and URM students provided examples of influential people who connected their aptitude and enthusiasm for mathematics, science, and problem-solving to engineering, explained the benefits of being an engineer, and provided advice about engineering academic and career pathways. Conclusions: Encouraging earlier consideration of engineering majors, such as during middle school, could allow women and URM students time to take requisite courses and take advantage of college preparatory programming. Likewise, universities can engage in intentional efforts to identify women and URM students with engineering interests and provide guidance. Such efforts should also include connecting them with other women and URM students in engineering. In addition, universities should support K-12 and university personnel in offering advice that can influence students' decision to declare an engineering major, which could help recruit more women and URM students into engineering.

Women and underrepresented minority (URM) undergraduates declare and complete science, technology, engineering, and mathematics majors at different rates in comparison to majority groups. Explanations of these differences have long been deficit oriented, focusing on aptitude or similar characteristics, but more recent work focuses on institutional contexts, such as academic climate and feelings of belonging (fit). This study examines the experiences of women and URM students in engineering undergraduate programs, focusing on how they fit, experiential factors affecting fit, and how fit is mitigated by social relationships from their networks and organizations in which they participate (i.e., social capital). Thematic analysis of 55 women and URM interviewee responses shows that students who fit well were those with majority characteristics, including race (i.e., White, White-passing) and gender (i.e., men, masculine appearance), and those in groups well represented in their programs numerically (i.e., men, Asian). In contrast, women and Black students encountered threats to their fit due to stereotyping from bias and differential treatment from others (i.e., being excluded from group work). However, students received advice from their social networks (i.e., family, professors) in which they were warned to expect discrimination, or through organizations in which they participated (i.e., National Association of Black Engineers) where their sense of community was expanded. The advice and resources provided through this network-based and participatory social capital mitigated fit for women and Black students, albeit in different ways, helping to preserve their feelings of belonging and promote their persistence in engineering. We offer suggestions to enact university policies to increase access to social capital with homophilious alters and educational opportunities for majority groups.

Background: Social capital, defined as the people one knows and the resources available through that network of people, has been a key variable in research examining the participation of women and underrepresented minority students in science, technology, engineering, and mathematics (STEM). This study focuses on two types of social capital: instrumental (concrete advice and resources) and expressive (emotional support and encouragement). The analysis of interviews with 55 White women and women and men underrepresented minority engineering undergraduate students shows how the instrumental and expressive social capital received from parents influenced their students' declaration of and persistence in the engineering major. Within this analysis, we considered students' transition to adulthood and the corresponding expectation that parents would still provide support but allow their children to independently determine their own paths. Results: Participants shared the advice they received from people in their social networks, with the majority of participants highlighting parents as a major contributor of instrumental and expressive social capital. Instrumental social capital was helpful in students' major declarations and offered them an opportunity to further develop their interests and aptitude in STEM as well as a pathway for obtaining an engineering degree. During the first year of their engineering major, students relied heavily on the expressive social capital of parents when considering whether to stay in engineering; parental encouragement of "you can do it" became a common resource. Conclusions: These findings offer nuance to explanations of social capital's influence on STEM degree major declaration and persistence, which often use deficit approaches. In highlighting the resources of social capital, especially expressive support, this work offers educators a new frame of reference for building upon the valuable advice offered by parents to their children completing engineering majors.

As part of a longitudinal research effort that examines the influence of social capital on differential persistence and retention among undergraduate engineering majors, this study examines how engineering degree-related social capital differs for first-year engineering students by gender and ethno-racial groups. Social capital is operationalized as a person's network of relationships with individuals who hold influential positions (e.g. parent, teacher, advisers) and access to resources that support persistence in engineering programs. Our data comprise survey responses from 2186 first-year engineering students, from eleven diverse colleges and universities, who provided information about their participation in engineering-related courses, activities, and programs while in high school as well as the individuals who influenced their decision to pursue an engineering major. We found few differences in social capital between men and women, but found many differences among ethno-racial groups, which suggests that different levels of social capital could influence students' persistence and retention.