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Tetta Hämäläinen

Biographic Data

ID8250000
NAMETetta Hämäläinen
GIVEN NAMESTetta
FAMILY NAMEHämäläinen
SIGNATUREHÄMÄLÄINEN T
AFFILIATIONSUniversity of Jyväskylä
ORCID0000-0003-4100-8888
VERIFIEDYes
TOTAL WORKS2
TOTAL CITATIONS0
AUTHOR COUNT2
EDITOR COUNT0
FIRST PUBLICATION YEAR2023
LATEST PUBLICATION YEAR2026
H-INDEX0
  • The Role of Psychological Inflexibility in Adolescents' Loneliness: School Friendship Closeness as a Mediator

    Open Access•Annina Jormanainen, Kaisa Kalttila et al.•ARTICLE•Scandinavian Journal of Psychology•2026

    This study aimed to expand knowledge on the roles of psychological inflexibility and school friendship closeness in adolescents' loneliness during the transition to upper secondary education. The participants were 885 Finnish adolescents (mean age = 15.74, SD = 0.37, 56% girls). Loneliness was measured twice: in Grade 9 and at the beginning of upper secondary school in 10th grade. Psychological inflexibility and the closeness of friendships in sc…

  • A guided online ACT intervention may increase psychological well-being and support school engagement in adolescents

    Open Access•Tetta Hämäläinen, Päivi Lappalainen et al.•ARTICLE•Journal of Contextual Behavioral…•2023

    The aim of the present study was to investigate the extent to which initial levels and changes in ninth-grade adolescents' (n = 243) psychological well-being were associated with their school engagement after the transition to upper secondary education. In addition, we investigated whether a brief guided online acceptance and commitment therapy (ACT) intervention program delivered during ninth grade was associated with adolescents’ subsequent sch…

No prominent works on this page.

  • A guided online ACT intervention may increase psychological well-being and support school engagement in adolescents

    Open Access•Tetta Hämäläinen, Päivi Lappalainen et al.•ARTICLE•Journal of Contextual Behavioral…•2023

    The aim of the present study was to investigate the extent to which initial levels and changes in ninth-grade adolescents' (n = 243) psychological well-being were associated with their school engagement after the transition to upper secondary education. In addition, we investigated whether a brief guided online acceptance and commitment therapy (ACT) intervention program delivered during ninth grade was associated with adolescents’ subsequent sch…

  • The Role of Psychological Inflexibility in Adolescents' Loneliness: School Friendship Closeness as a Mediator

    Open Access•Annina Jormanainen, Kaisa Kalttila et al.•ARTICLE•Scandinavian Journal of Psychology•2026

    This study aimed to expand knowledge on the roles of psychological inflexibility and school friendship closeness in adolescents' loneliness during the transition to upper secondary education. The participants were 885 Finnish adolescents (mean age = 15.74, SD = 0.37, 56% girls). Loneliness was measured twice: in Grade 9 and at the beginning of upper secondary school in 10th grade. Psychological inflexibility and the closeness of friendships in sc…

Anxiety (1 works) · Association (psychology) (1 works) · Attachment and Relationship Dynamics (1 works) · Bullying, Victimization, and Aggression (1 works) · Child and Adolescent Psychosocial and Emotional Development (1 works) · Clinical Psychology (1 works) · Clinical Psychology (1 works) · Closeness (1 works) · Depressive symptoms (1 works) · Developmental psychology (1 works)

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