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Alistair T R Sim

Biographic Data

ID7174036
NAMEAlistair T R Sim
GIVEN NAMESAlistair T R
FAMILY NAMESim
SIGNATURESIM A T R
AFFILIATIONSCompass (United States)
VERIFIEDNo
TOTAL WORKS11
TOTAL CITATIONS5
AUTHOR COUNT11
EDITOR COUNT0
FIRST PUBLICATION YEAR2020
LATEST PUBLICATION YEAR2026
H-INDEX1
  • Character attributes scale

    Open Access•Roya Abbasi‐Asl, Richard M Lerner et al.•ARTICLE•International Journal of…•2026

    To understand youth character development, assessments must consider both the fluctuations of an individual’s character across time and place (within-person variations), as well as the changes in their character relative to other individuals in their context (between-person differences). Although measures of character exist for between-person research, there is a need for context-specific, valid, and reliable measures of character that can captur…

  • Character strengths and well-being

    Jonathan M Tirrell, Natasha Keces et al.•ARTICLE•Journal of Moral Education•2025

    Youth development programs in the majority world are increasingly taking a strengths-based, positive youth development (PYD) approach to promoting youth thriving. Although character strengths are believed to support well-being, more evidence from majority-world contexts is needed. Using data derived from the Compassion International Study of PYD in Uganda (n = 606, Mage = 12.5 years, SDage = 2.3, 50.2% female), we validated a measurement model of…

  • Character development among Ugandan youth

    Roya Abbasi‐Asl, Dian Yu et al.•ARTICLE•Journal of Moral Education•2025

    Person-specific and variable-focused assessments represent two distinct approaches to research, each offering valuable insights from different standpoints. However, the focus of character studies has mostly been on variable-focused assessments that measure between-person differences, leaving the specific trajectories of character development and the relation among character constructs at the within-person level unexplored. In this article, we stu…

  • Using the orthogenetic principle to explore the ontogeny of the positive development of Ugandan youth

    Jonathan M Tirrell, G John Geldhof et al.•ARTICLE•Applied Developmental Science•2025

  • Using youth-specific approaches to illuminate character-well-being relations

    Open Access•Roya Abbasi‐Asl, Dian Yu et al.•ARTICLE•International Journal of…•2025

    To date, most studies linking youth well-being to character attributes focus on average effects based on between-person differences. In this study, we examined the within- and between-person relations among character attributes and well-being using an intensive longitudinal data set from the Compassion International (CI) Study of Positive Youth Development in Uganda. Participants (200 CI-enrolled youth, 49.5% female, Mage = 12.13, SDage = 2.19) c…

  • Measuring Youth Perceptions of Being Known and Loved and Positive Youth Development

    Open Access•Jonathan M Tirrell, Elizabeth M Dowling et al.•ARTICLE•Child & Youth Care Forum•2023

  • ‘That is when justice becomes complete.’ Exemplars’ perspectives on forgiveness as a civic virtue in post-genocide Rwanda

    Jonathan M Tirrell, Erin I Kelly et al.•ARTICLE•Journal of Moral Education•2023

    Should forgiveness be considered a civic virtue that promotes peace and justice following injustice? In the aftermath of conflicts as severe as state-sponsored genocide, how can relationships be restored, communities reconciled, and justice achieved? We interviewed 15 adults in Rwanda—survivors of the 1994 genocide, nominated as exemplars for their youth-serving roles in their communities and their experiences with forgiving the traumas of the ge…

  • Agentic and Receptive Hope

    Open Access•Jennifer Medina Vaughn, Paul E King et al.•ARTICLE•Religions•2022•References: 52

    Hope contributes to positive development in adolescents, and religious and spiritual contexts may be particularly important for developing and supporting hope. However, extant literature on hope, religion, and spirituality neglects their synergistic relation, leaving questions about how they work together to support development. In this study, we explore how religiousness and spirituality (R/S) inform hope by identifying unique synergies that mig…

  • Exploring the role of the “Big Three” features of effective youth development programs in El Salvador

    Open Access•Jonathan M Tirrell, Somaly Hay et al.•ARTICLE•International Journal of…•2021

    Programs effective in promoting positive youth development (PYD) involve curricular features termed the Big Three: Positive and sustained adult–youth relationships; life-skill-building activities; and youth contribution and leadership opportunities. Data from 610 adolescents (50% female; M age = 16.39 years, SD = 1.83) enrolled in Compassion International-supported programs in El Salvador indicated that scores derived from a youth-report measure …

  • Evaluating the measure of diverse adolescent spirituality in samples of Mexican and Salvadoran youth

    Paul E King, Yeonsoo Yoo et al.•ARTICLE•Psychology of Religion and…•2021

  • Exploring Religiousness and Hope

    Open Access•Paul E King, Pamela Ebstyne King et al.•ARTICLE•Religions•2020•Cited by: 5•References: 61

    Given the strong link between religiousness and hope, we sought to further understand the relations of these potentially powerful resources for youth living in adversity. Although existing research suggests that religiousness might be associated with adolescent hope via spirituality and social connections, few studies have tested models that integrate both. Thus, as applied psychologists, the aim of this paper was to test a theoretical model in t…

  • Exploring Religiousness and Hope

    Open Access•Paul E King, Pamela Ebstyne King et al.•ARTICLE•Religions•2020•Cited by: 5•References: 61

    Given the strong link between religiousness and hope, we sought to further understand the relations of these potentially powerful resources for youth living in adversity. Although existing research suggests that religiousness might be associated with adolescent hope via spirituality and social connections, few studies have tested models that integrate both. Thus, as applied psychologists, the aim of this paper was to test a theoretical model in t…

  • Exploring Religiousness and Hope

    Open Access•Paul E King, Pamela Ebstyne King et al.•ARTICLE•Religions•2020•Cited by: 5•References: 61

    Given the strong link between religiousness and hope, we sought to further understand the relations of these potentially powerful resources for youth living in adversity. Although existing research suggests that religiousness might be associated with adolescent hope via spirituality and social connections, few studies have tested models that integrate both. Thus, as applied psychologists, the aim of this paper was to test a theoretical model in t…

  • Exploring the role of the “Big Three” features of effective youth development programs in El Salvador

    Open Access•Jonathan M Tirrell, Somaly Hay et al.•ARTICLE•International Journal of…•2021

    Programs effective in promoting positive youth development (PYD) involve curricular features termed the Big Three: Positive and sustained adult–youth relationships; life-skill-building activities; and youth contribution and leadership opportunities. Data from 610 adolescents (50% female; M age = 16.39 years, SD = 1.83) enrolled in Compassion International-supported programs in El Salvador indicated that scores derived from a youth-report measure …

  • Evaluating the measure of diverse adolescent spirituality in samples of Mexican and Salvadoran youth

    Paul E King, Yeonsoo Yoo et al.•ARTICLE•Psychology of Religion and…•2021

  • Agentic and Receptive Hope

    Open Access•Jennifer Medina Vaughn, Paul E King et al.•ARTICLE•Religions•2022•References: 52

    Hope contributes to positive development in adolescents, and religious and spiritual contexts may be particularly important for developing and supporting hope. However, extant literature on hope, religion, and spirituality neglects their synergistic relation, leaving questions about how they work together to support development. In this study, we explore how religiousness and spirituality (R/S) inform hope by identifying unique synergies that mig…

  • Measuring Youth Perceptions of Being Known and Loved and Positive Youth Development

    Open Access•Jonathan M Tirrell, Elizabeth M Dowling et al.•ARTICLE•Child & Youth Care Forum•2023

  • ‘That is when justice becomes complete.’ Exemplars’ perspectives on forgiveness as a civic virtue in post-genocide Rwanda

    Jonathan M Tirrell, Erin I Kelly et al.•ARTICLE•Journal of Moral Education•2023

    Should forgiveness be considered a civic virtue that promotes peace and justice following injustice? In the aftermath of conflicts as severe as state-sponsored genocide, how can relationships be restored, communities reconciled, and justice achieved? We interviewed 15 adults in Rwanda—survivors of the 1994 genocide, nominated as exemplars for their youth-serving roles in their communities and their experiences with forgiving the traumas of the ge…

  • Character strengths and well-being

    Jonathan M Tirrell, Natasha Keces et al.•ARTICLE•Journal of Moral Education•2025

    Youth development programs in the majority world are increasingly taking a strengths-based, positive youth development (PYD) approach to promoting youth thriving. Although character strengths are believed to support well-being, more evidence from majority-world contexts is needed. Using data derived from the Compassion International Study of PYD in Uganda (n = 606, Mage = 12.5 years, SDage = 2.3, 50.2% female), we validated a measurement model of…

  • Character development among Ugandan youth

    Roya Abbasi‐Asl, Dian Yu et al.•ARTICLE•Journal of Moral Education•2025

    Person-specific and variable-focused assessments represent two distinct approaches to research, each offering valuable insights from different standpoints. However, the focus of character studies has mostly been on variable-focused assessments that measure between-person differences, leaving the specific trajectories of character development and the relation among character constructs at the within-person level unexplored. In this article, we stu…

  • Using the orthogenetic principle to explore the ontogeny of the positive development of Ugandan youth

    Jonathan M Tirrell, G John Geldhof et al.•ARTICLE•Applied Developmental Science•2025

  • Using youth-specific approaches to illuminate character-well-being relations

    Open Access•Roya Abbasi‐Asl, Dian Yu et al.•ARTICLE•International Journal of…•2025

    To date, most studies linking youth well-being to character attributes focus on average effects based on between-person differences. In this study, we examined the within- and between-person relations among character attributes and well-being using an intensive longitudinal data set from the Compassion International (CI) Study of Positive Youth Development in Uganda. Participants (200 CI-enrolled youth, 49.5% female, Mage = 12.13, SDage = 2.19) c…

  • Character attributes scale

    Open Access•Roya Abbasi‐Asl, Richard M Lerner et al.•ARTICLE•International Journal of…•2026

    To understand youth character development, assessments must consider both the fluctuations of an individual’s character across time and place (within-person variations), as well as the changes in their character relative to other individuals in their context (between-person differences). Although measures of character exist for between-person research, there is a need for context-specific, valid, and reliable measures of character that can captur…

Psychology (11 works) · Social Psychology (10 works) · Youth Development and Social Support (8 works) · Developmental psychology (7 works) · Sociology (5 works) · Resilience and Mental Health (4 works) · Early Childhood Education and Development (3 works) · Epistemology (3 works) · Mathematics (3 works) · Political science (3 works)

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