Social and Behavioral Sciences Commons^™

Development Of A Multidimensional Measure Of Wellbeing For Emerging Adults Utilizing A Convergent Parallel Mixed Method Design, Kelley Marie Wick

Dissertations and Doctoral Documents from University of Nebraska-Lincoln, 2023–

Attempting to conceptualize wellbeing is difficult, and the current research literature does not offer a standard definition that encapsulates the complexity of this construct, nor has there been a thorough consideration the impact of culture and societal standards of behavior on wellbeing. Additionally, the emergence of a new developmental period between adolescence and true adulthood (emerging adulthood) offers an additional layer of nuance, as many of the traditional scales currently used to measure wellbeing are inappropriate for emerging adults. A major gap in the current research literature is the reluctance in developing measures with the help of the target population. …

Tsunami Exposure And Mental Health Consequences: Protective Role Of Cultural Coping Strategies, Thulitha Wickrama, Michael J. Merten, K. A.S. Wickrama, Amanda Terrell

Department of Child, Youth, and Family Studies: Faculty Publications

There is a knowledge gap regarding the link between disaster exposure and adolescent mental health problems in developing countries. This study examines the case of Sri Lanka to investigate (a) the immediate and long-term mental health impact of the 2004 tsunami disaster on adolescents and (b) the potential moderating effects of unique cultural and family practices that prevail in Sri Lanka. This study used a random sample of 160 adolescents (ages 12–19) and their mothers who were exposed to the tsunami disaster while living in a southern Sri Lankan village and provided prospective data immediately after the disaster (2005) and …

An Analysis Of Child Valence Bias Trajectories As A Result Of Parental Factors: A Longitudinal Perspective, Kaylee Brooke Donner

Honors Theses

Valence bias is an important part of how individuals perceive the world around them, and this is especially influential in terms of children’s development. This study used data from longitudinal data collection surveys consisting of 197 participants, ages 6-17, to investigate correlations between valence bias, puberty, parental conflict, emotion regulation, temperament, interpersonal regulation, trait anxiety, and personality. This research provides much sought-after knowledge in terms of how parental factors impact children’s development, specifically children's valence bias development. Previous research has shown that emotion regulation in parents, along with different parenting styles with equal levels of discipline and loving support largely …

Psychological Distress And Behavioral Vigilance In Response To Minority Stress And Threat Among Members Of The Asian American And Pacific Islander Community During The Covid-19 Pandemic, Andrew S. Franks, Rin Nguyen, Y. Jenny Xiao, Dena Abbott

Department of Educational Psychology: Faculty Publications

Stigmatization, hostility, and violence towards the Asian American and Pacific Islander (AAPI) community have increased sharply during the COVID-19 pandemic. It is important to conduct research to promote understanding of the effects of such stigmatization on the AAPI community. Accordingly, the present study used a combined minority stress and integrated threat framework to examine whether factors related to AAPI identity would moderate the relationship between stigmatization/threat associated with AAPI identity and increased psychological distress and behavioral vigilance. AAPI individuals were recruited online from both Turk Prime and Reddit and completed measures of perceived stigmatization; integrated threat; depression, anxiety, and stress; …

Relation Of Life Sciences Students’ Metacognitive Monitoring To Neural Activity During Biology Error Detection, Mei Grace Behrendt, Caron Clark, Mckenna Elliott, Joseph Dauer

Department of Educational Psychology: Faculty Publications

Metacognitive calibration—the capacity to accurately self-assess one’s performance—forms the basis for error detection and self-monitoring and is a potential catalyst for conceptual change. Limited brain imaging research on authentic learning tasks implicates the lateral prefrontal and anterior cingulate brain regions in expert scientific reasoning. This study aimed to determine how variation in undergraduate life sciences students’ metacognitive calibration relates to their brain activity when evaluating the accuracy of biological models. Fifty undergraduate students enrolled in an introductory life sciences course completed a biology model error detection task during fMRI. Students with higher metacognitive calibration recruited lateral prefrontal regions linked in …

Growing Through Adversity: The Relation Of Early Childhood Educator Post-Traumatic Growth To Young Children’S Executive Function, Caron A. C. Clark, Holly Hatton-Bowers, Kimia Akhavein, Sarah Rasby, Gilbert R. Parra

Department of Educational Psychology: Faculty Publications

Introduction: Early childhood educators (ECEs) play a critical role in supporting the development of young children’s executive functions (EF). EF, in turn, underpins lifelong resilience and well-being. Unfortunately, many ECEs report adverse childhood experiences (ACEs) that may compound high stress levels associated with an emotionally and physically demanding profession. ACEs have well-established negative implications for adult well-being and may dampen ECEs’ capacities to engage in emotionally responsive interactions with children. However, many individuals who experience ACEs also report post-traumatic growth experiences that foster empathy, self-determination, and resilience. Such post-traumatic growth may equip teachers with skills to engage in responsive …

Impact Of Covid‑19 On Food Security And Diet Quality In Chilanga District, Zambia, Shela Sridhar, Janella Kang, Joyce Makasa, Sally Bell‑Cross, Isabel Madzorera, Ethan Zulu, Davidson H. Hamer

Department of Child, Youth, and Family Studies: Faculty Publications

Introduction Food security and nutrition have been severely impacted during the COVID-19 pandemic, particularly in low- and middle-income countries (LMICs). We aimed to quantify the impacts of the pandemic on food security and diet diversity within Chilanga District in Zambia and identify target areas for high-impact social protection and safety net programs.

Methods We conducted a cross-sectional study in Chilanga district immediately after the Omicron variant surge in February 2022. Diet quality and food security were assessed based on a household diet questionnaire and a Minimum Dietary Diversity-Women (MDD-W) score was calculated. A paired t-test was used to determine whether …

Indicators Of Community Physical Activity Resources And Opportunities And Variation By Community Sociodemographic Characteristics: A Scoping Review, Ann E. Rogers, Michaela A. Schenkelberg, Peter Stoepker, Danielle Westmark, Deepa Srivastava, David A. Dzewaltowski

Department of Child, Youth, and Family Studies: Faculty Publications

Objective: This scoping review synthesizes studies examining community-level variability in physical activity resource (assets) and opportunity (organized group physical activity services) availability by community sociodemographic characteristics to describe methodologies for measuring resources/opportunities, indicators characterizing availability, and associations between community-level sociodemographic characteristics and availability.

Methods: A systematic search was conducted in MEDLINE, CINAHL, PsycINFO, and Scopus for literature through 2022. Eligible studies quantitatively examined measures of physical activity resource/opportunity availability by community-level racial, ethnic, and/or socioeconomic characteristics within geospatially defined communities. Extracted data included: community geospatial definitions, sociodemographic characteristics assessed, methodologies for measuring and indicators of community physical activity …

Early Childhood Language Gains, Kindergarten Readiness, And Grade 3 Reading Achievement, Jessica A.R. Logan, Shayne B. Piasta, Kelly M. Purtell, Robert Nichols, Rachel E. Schachter

Department of Child, Youth, and Family Studies: Faculty Publications

In this preregistered study, we used latent change score models to address two research aims: (1) whether preschool-aged children's language gains, over a year of early childhood education, were associated with later performance on state-mandated, literacy-focused kindergarten readiness and Grade 3 reading achievement assessments, and (2) whether gains in language, a more complex skill, predicted these outcomes after controlling for more basic emergent literacy skills. There were 724 participating children (mean = 57 months; 51% male; 76% White, 12% Black, 6% multiple races, and 5% Hispanic or Latino). We found that language gains significantly predicted kindergarten readiness when estimated in …

Rates Of Recent Adverse Childhood Experiences Among Indigenous Children, Emily A. Waterman, Katie Edwards, Natira Mullet, Ramona Herrington, Skyler Hopfauf, Preciouse Trujillo, Naomi Even-Aberle, Lorey Wheeler

Department of Educational Psychology: Faculty Publications

The current paper describes rates of recent (past six months) adverse childhood experiences (ACEs) and examines the association of ACEs with cultural connection and depressive symptoms among Indigenous children aged 10 to 14 (N = 177; mean age = 11.8; 48.3% boys; 44.3% girls; 7.4% another gender identity). Children completed baseline surveys as part of a larger evaluation of a culturally grounded, strengths-focused, family-based program to prevent ACEs. Surveys included an inclusive measure of ACEs developed for the current study, an adapted measure of connection to culture, and the Children’s Depression Screener. Results for ACEs indicated that 18.6% of …

Students' Attitudes Towards Animals Influences Youth Development Constructs Based On Interactions With Different Animal Species Prior To College, Allison K. Pachunka

Department of Animal Science: Dissertations, Theses, and Student Research

Human-animal interactions (HAI) are commonplace in society and play a consequential role in a variety of situations such as companion animal ownership, agriculture, or youth programs such as 4-H or FFA. Interacting with animals has been shown to provide developmental benefits to children. Positive youth development (PYD), measured by the Five Cs Model, is a framework that focuses on fostering youth’s potential through positive activities which has been studied specifically in 4-H. However, this framework has not been applied to other organizations such as the National FFA Organization (FFA) or to other young adults with less formal interactions with animals. …

Development And Psychometric Validation Of The Pandemic-Related Traumatic Stress Scale For Children And Adults, Courtney K. Blackwell, Phillip Sherlock, Kathryn L. Jackson, Julie A. Hofheimer, David Cella, Molly A. Algermissen, Akram N. Alshawabkeh, Lyndsay A. Avalos, Tracy Bastain, Clancy Blair, Michelle Bosquet Enlow, Patricia A. Brennan, Carrie Breton, Nicole R. Bush, Aruna Chandran, Shaina Collazo, Elisabeth Conradt, Sheila E. Crowell, Sean Deoni, Amy J. Elliott, Jean A. Frazier, Jody M. Ganiban, Diane R. Gold, Julie B. Herbstman, Christine Joseph, Margaret R. Karagas, Barry Lester, Jessica A. Lasky-Su, Leslie D. Leve, Kaja Z. Lewinn, W. Alex Mason, Elisabeth C. Mcgowan, Kimberly S. Mckee, Rachel L. Miller, Jenae M. Neiderhiser, Thomas G. O’Connor, Emily Oken, T. Michael O’Shea, David Pagliaccio, Rebecca J. Schmidt, Anne Marie Singh, Joseph B. Stanford, Leonardo Trasande, Rosalind J. Wright, Cristiane S. Duarte, Amy E. Margolis

Department of Child, Youth, and Family Studies: Faculty Publications

To assess the public health impact of the COVID-19 pandemic on mental health, investigators from the National Institutes of Health Environmental influences on Child Health Outcomes (ECHO) research program developed the Pandemic-Related Traumatic Stress Scale (PTSS). Based on the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) acute stress disorder symptom criteria, the PTSS is designed for adolescent (13–21 years) and adult self-report and caregiver-report on 3–12-year-olds. To evaluate psychometric properties, we used PTSS data collected between April 2020 and August 2021 from non-pregnant adult caregivers (n = 11,483), pregnant/postpartum individuals (n = 1,656), …

Amultidimensional Examination Of Children’S Endorsement Of Gender Stereotypes, Cindy Faith Miller, Lorey A. Wheeler, Bobbi Woods

Nebraska Center for Research on Children, Youth, Families, and Schools: Faculty Publications

The present research applied a multidimensional framework to the study of gender stereotypes by investigating whether elementary school children display different levels of endorsement when considering distinct gender stereotype constructs (ability, category, and interest) and feminine versus masculine stereotypes. Study 1 (N = 403) compared children’s ability and category beliefs using a set of gender-neutral skill items. Study 2 (N = 539) extended this research by examining whether children showed different patterns of ability and category decisions for feminine versus masculine occupational items. Study 3 (N = 974) furthered our understanding of the construct dimension by comparing …

Less Computer Access: Is It A Risk Or A Protective Factor For Cyberbullying And Face-To-Face Bullying Victimization Among Adolescents In The United States?, Jun Sung Hong, Miao Wang, Rekha Negi, Dexter R. Voisin, Lois M. Takahashi, Andre Iadipaolo

Department of Educational Psychology: Faculty Publications

The present study investigates whether less computer access is associated with an increase or decrease in cyberbullying and face-to-face bullying victimization. Data were derived from the 2009–2010 Health Behavior in School-Aged Children U.S. Study, consisting of 12,642 adolescents aged 11, 13, and 15 years (Mage = 12.95). We found that less computer usage was negatively associated with cyberbullying victimization and face-to-face bullying victimization. The findings from the study have implications for research and practice.

How Teachers Use Data: Description And Differences Across Prek Through Third Grade, Amanda Witte, Lisa Knoche, Susan Sheridan, Natalie A. Koziol

Nebraska Center for Research on Children, Youth, Families, and Schools: Faculty Publications

The use of data to inform instruction has been linked to improved student outcomes, early identification of intervention needs, and teacher decision-making and efficacy. Additionally, data are used as a means of accountability within educational settings. However, little is known about data use practices among early grades teachers. The purpose of the current study is to describe the data use of PreK to third grade teachers and to investigate differences in data use and support across grade levels. Participants were 307 early childhood teachers in PreK and early elementary school. Analysis of survey data revealed, overall, most teachers across grade …

Undernutrition In Older Children And Adolescents In Peri-Urban Zambia, Shela Sridhar, Janella S. Kang, Isabel Madzorera, Ethan Zulu, Joyce Makasa, Sally Bell Cross, Davidson H. Hamer

Department of Child, Youth, and Family Studies: Faculty Publications

Background: Adolescents make up roughly a quarter of the population in Zambia; however, most nutrition-related programming is targeted at the underfive population. Understanding the scale of undernutrition in older children and adolescents is fundamental to alleviating food insecurity and addressing undernutrition across all age groups.

Methods: A cross-sectional survey was performed in four low-income, peri-urban compounds in Chilanga District which included anthropometric measurements of children between ages 6 months-19 years and a household-level diet diversity and food security questionnaire. Wasting was used for children under 5 and thinness for children 5–19 years. Descriptive analysis and multivariate logistic regression …

Undernutrition In Older Children And Adolescents In Peri-Urban Zambia, Shela Sridhar, Janella S. Kang, Isabel Madzorera, Ethan Zulu, Joyce Makasa, Sally Bell Cross, Davidson H. Hamer

Department of Child, Youth, and Family Studies: Faculty Publications

Background: Adolescents make up roughly a quarter of the population in Zambia; however, most nutrition-related programming is targeted at the underfive population. Understanding the scale of undernutrition in older children and adolescents is fundamental to alleviating food insecurity and addressing undernutrition across all age groups.

Methods: A cross-sectional survey was performed in four low-income, peri-urban compounds in Chilanga District which included anthropometric measurements of children between ages 6 months-19 years and a household-level diet diversity and food security questionnaire. Wasting was used for children under 5 and thinness for children 5–19 years. Descriptive analysis and multivariate logistic regression …

Social Networks And Violence Victimization And Perpetration Among Youth: A Longitudinal Analysis, Natira Mullet, Emily A. Waterman, Katie M. Edwards, Victoria Banyard, Thomas W. Valente

Nebraska Center for Research on Children, Youth, Families, and Schools: Faculty Publications

Interpersonal violence (IV) is a serious concern for adolescents in the United States that has devastating impacts for individuals and communities. Given the increased importance placed on friendships during adolescence, the purpose of the current study was to examine the extent to which IV experiences cluster within youths' friendship networks. Participants were students (N = 1303) in grades 7th to 10th who completed surveys at the beginning and end of an academic year. Results showed that friends' average perpetration (i.e., the percentage of the friends they nominated who perpetrated IV) was strongly associated with likelihood of individual perpetration at …

Graduate Student Award Winners In Educational Psychology: What Made Them Successful?, Kenneth A. Kiewra, Saima Hasnin, Jared Soundy, Priya Karimuddanahalli Premkumar, Chris Labenz

Department of Educational Psychology: Faculty Publications

Much is known about the factors that make some educational psychologists highly productive. Beginning nearly 25 years ago, Kiewra and colleagues began a series of six qualitative investigations to uncover the keys to scholarly success in educational psychology. The initial study (Kiewra & Creswell, 2000) investigated Richard Anderson, Richard Mayer, and Michael Pressley, who were ranked as the top scholars in a survey of educational psychologists. The second study (Patterson- Hazley & Kiewra, 2013), more than a decade later, investigated productive scholars Patricia Alexander, Richard Mayer, Dale Schunk, and Barry Zimmerman who were ranked as the top scholars in a …

Protective Factors In The Relationship Between Perceived Discrimination And Risky Drinking Among American Indian Adolescent, Ying Guo, Randall C. Swaim, W. Alex Mason

Department of Child, Youth, and Family Studies: Faculty Publications

Introduction: The relationship between perceived discrimination and risky drinking among American Indian (AI) youth is understudied, and the potential protective factors that may buffer this association are unknown. Therefore, the objective of this study was to examine protective factors across individual, family, school, peer, and cultural domains of the social ecology that might attenuate the relationship between perceived discrimination and risky drinking among AI adolescents.

Method: Data were from the Substance Use Among American Indian Youth Study (Swaim and Stanley, 2018, 2021). AI youth who have used alcohol in their lifetime (n = 2516 within 62 schools) …

Implementation Of Participatory Research In Vulnerable Context: Methodological Strategies And Challenges, Bruna Larissa Seibel, Raysa Schmitz Serafim, Nathassia Santos Da Silva, José Antônio Caetano Araújo, Paul Russell Springer, Cody S. Hollist

Department of Child, Youth, and Family Studies: Faculty Publications

Participatory methods contribute to scientific rigor by highlighting the contextual needs, especially of underrepresented populations, making them protagonists in the process of social change. This article aims to present the application of a participatory research method, called Community-Based Participatory Research (CBPR), in a context of social vulnerability in southern Brazil. It seeks to discuss the challenges and strengths of the method, which provides ecological validity for the development of public policies appropriate to the context, while empowering the participants. The research has been carried out since 2019 and, among the inherent challenges, has also faced the difficulties posed by the …

Gender-Neutral Bathrooms On Campus: A Multicampus Study Of Cisgender And Transgender And Gender Diverse College Students, Merle Huff, Katie Edwards, Victoria Mauer, Heather Littleton, Stephanie Lim, Kayla E. Sall

Department of Educational Psychology: Faculty Publications

Objective: This study examined cisgender and transgender and gender diverse (TGD) college students’ perceptions of gender-neutral bathroom availability across eight U.S. campuses, TGD students’ fear of harassment related to (lack of) availability of gender-neutral bathrooms, and the relation between fear of harassment and TGD students’ psychological distress.

Methods: Participants were 4,328 college students (4,195 cisgender, 30 binary transgender, 103 gender diverse) from eight U.S. institutions of higher education.

Results: The majority (84.2%) of TGD students and 34.6% of cisgender students perceived there were too few gender-neutral bathrooms on their campus. Further, TGD students’ fear of harassment related to a lack …

Adverse Childhood Experiences Among Adolescent Girls In Residential Treatment: Relationship With Trauma Symptoms, Substance Use, And Delinquency, Akemi E. Mii

Department of Psychology: Dissertations, Theses, and Student Research

Adverse childhood experiences (ACEs) refer to negative events during childhood or adolescence including abuse, maltreatment, and exposure to household dysfunction (Kalmakis & Chandler, 2014). ACEs are associated with negative outcomes including mental and behavioral health concerns and offending (Fox et al., 2015). The risk of negative outcomes associated with ACEs increases when an individual experiences polyvictimization (experiencing multiple types of adverse events; Felitti et al., 1998; Finkelhor et al., 2011). A majority of adolescents served by residential treatment programs (RTPs) have experienced polyvictimization (Briggs et al., 2013). Research examining juvenile offending and youth delinquency has focused on boys. Thus, research …

Patterns Of Classroom Organization In Classrooms Where Children Exhibit Higher And Lower Language Gains, Laura Cutler, Rachel E. Schachter, Clariebelle Gabas, Shayne B. Piasta, Kelly M. Purtell, Nathan P. Helsabeck

Department of Child, Youth, and Family Studies: Faculty Publications

Previous research suggests that the ways in which early childhood classrooms are organized may facilitate children’s language learning. However, different measures of classroom organization often yield inconsistent findings regarding child outcomes. In this study, we investigated multiple aspects of classroom organization across two time points in classrooms where children made varying language gains. Using a purposeful sample of 60 early childhood classrooms, 30 in which children made higher language gains and 30 in which children made lower language gains, we explored the organization of the physical classroom literacy environment, classroom management, classroom time, and classroom activities. Research Findings: Results indicated …

The Moderating Role Of Socioeconomic Status For The Link Between Parent-Teacher Communication And Children's Academic Achievement, Haley Withuhn

Honors Theses

Parent-teacher communication plays a vital role in children’s educational success and has been positively linked to academic achievement. Family socioeconomic status has been shown to play a significant role in how we understand parent-teacher communication. The purpose of the current study is to explore the role of socioeconomic status for the link between parent-teacher communication and children’s academic achievement. A socioeconomically diverse sample of approximately 174 early elementary school students was used to explore links between parent- teacher communication, academic achievement, and household socioeconomic status (SES). Teachers report on students’ reading and mathematics achievement according to the Nebraska State Standards. …

Coparenting Support In The Context Of Difficult Children: Mother And Father Differences, Victoria J. Johnson, Dongho Choi, Lorey A. Wheeler, Patty X. Kuo

Department of Child, Youth, and Family Studies: Faculty Publications

While parenting children with difficult behaviors can intensify stress within the entire family system, families may lean on other familial relationships to mitigate that stress. The coparenting relationship is known to play a key role within the family system for child outcomes and familial interactions, but it is not clear whether it eases the stress and challenge of raising a difficult child, nor how that plays out differently for mothers versus fathers. Ninety-six couples (89.7% married) parenting young children (Mean age = 3.22 years) were included in this study. Using cross-sectional and aggregated daily response data, actor–partner interdependence models were …

Coparenting Support In The Context Of Difficult Children: Mother And Father Differences, Victoria J. Johnson, Dongho Choi, Lorey A. Wheeler, Patty X. Kuo

Department of Child, Youth, and Family Studies: Faculty Publications

While parenting children with difficult behaviors can intensify stress within the entire family system, families may lean on other familial relationships to mitigate that stress. The coparenting relationship is known to play a key role within the family system for child outcomes and familial interactions, but it is not clear whether it eases the stress and challenge of raising a difficult child, nor how that plays out differently for mothers versus fathers. Ninety-six couples (89.7% married) parenting young children (Mean age = 3.22 years) were included in this study. Using cross-sectional and aggregated daily response data, actor–partner interdependence models were …

Family Strengths Among Native American Families And Families Living In Poverty: Preventing Adverse Childhood Experiences, Natira Mullet, Emily A. Waterman, Katie Edwards, Briana Simon, Skyler Hopfauf, Ramona Herrington

Nebraska Center for Research on Children, Youth, Families, and Schools: Faculty Publications

Objective: The purpose of this study was to understand how youth, caregivers, and community professionals perceive family strengths and adverse childhood experiences (ACEs) in their community. Specifically, this study was focused on the protective role of caregivers and families, positive youth development, and how Native American families and families living in poverty support adolescents’ social–emotional development and help them thrive in the face of adversity.

Background: Research documents the concerning rates and negative outcomes of ACEs. However, very little research has examined the views of families and professionals on how to prevent ACES among these populations.

Method: Participants were youth …

White Privilege And Teacher Perceptions Of Teacher-Child Relationship Quality, Kathleen Moritz Rudasill, Colin M. Mcginnis, Sheng-Lun Cheng, Dwayne Ray Cormier, Natalie A. Koziol

Nebraska Center for Research on Children, Youth, Families, and Schools: Faculty Publications

In this study, we investigated differences in teachers’ perceptions of the teacher-child relationship from kindergarten through second grade as a function of child race and gender from the perspective of critical race theory and the cultural synchrony hypothesis. Given the extensive evidence of White privilege and anti-Black racism in the US education system, we expected that teachers, particularly White teachers, would perceive their relationships with White children more positively than with Black children. Controlling for family SES and child gender, results supported this hypothesis. Black boys had the highest risk of being perceived by teachers as having poor relationships with …

John Glover: A Long Overdue Account Of His Productive Scholarship Methods, Kenneth A. Kiewra, Douglas Kauffman

Department of Educational Psychology: Faculty Publications

How are some scholars so productive? Kiewra and colleagues have interviewed about two dozen productive scholars over six studies to find out (Flanigan et al., 2018; Kiewra & Creswell, 2000; Kiewra et al., 2021; Kiewra et al., 2023; Patterson-Hazley & Kiewra, 2013; Prinz et al., 2020). Meanwhile, Bembenutty has also interviewed about 30 contemporary scholars to uncover their productivity pathways (Bembenutty, 2015, 2022). Absent from these interviews, though, is John Glover, the founding editor of Educational Psychology Review and one of the leading scholars of his time. Unfortunately, Glover’s time was brief. He died from a fallen tree in 1989 …