Lyons, Michael D Finding the Sweet Spot: Investigating the Effects of Relationship Closeness and Instrumental Activities in School-based Mentoring. [electronic resource] - American journal of community psychology 03 2019 - 88-98 p. digital Publication Type: Journal Article; Randomized Controlled Trial ISSN: 1573-2770 Standard No.: 10.1002/ajcp.12283 doi Subjects--Topical Terms: Academic SuccessAdolescentChildFemaleHumansInterpersonal RelationsMaleMentoring--methodsMentors--psychologyProgram EvaluationRegression AnalysisSchoolsStudents