Integrating pre-game rituals and pre-performance routines in a culture-specific context : implications for sport psychology consultancy

von Hagan, John Elvis (Autor), ... Schack, Thomas (Autor)
Erschienen in International journal of sport and exercise psychology, 17 (2019), 1 (Sport and exercise psychology in emerging countries. Part II), S. 18-31, Lit.

The influence of indigenous culture on sport psychology practice : challenges and prospects

von Hagan, John Elvis (Autor), ... Schack, Thomas (Autor)
Erschienen in Psychology & behavioral science international journal, 7 (2017), 4, Art.-ID 555719, [3 S.], Lit.

Exploring temporal patterning of psychological skills usage during the week leading up to competition : Lessons for developing intervention programmes

von Hagan, John Elvis (Autor), ... Pollmann, Dietmar (Autor), Schack, Thomas (Autor)
Erschienen in PLoS one / Public Library of Science, 12 (2017), 8, Art.-ID e0181814, [14 S.], Lit.

Interaction between gender and skill on competitive state anxiety using the time-to-event paradigm : what roles do intensity, direction, and frequency dimensions play?

von Hagan, John Elvis (Autor), ... Pollmann, Dietmar (Autor), Schack, Thomas (Autor)
Erschienen in Frontiers in psychology, 8 (2017), Art.-ID 692, [13 S.], Lit.

Passion play : embracing new scientific perspectives for improved sport psychology consulting

von Hagan, John Elvis (Autor), ... Schack, Thomas (Autor), Koester, Dirk (Autor)
Erschienen in SOJ psychology, 5 (2018), 1, S. 1-5, Lit.

Coaching with virtual reality, intelligent glasses and neurofeedback : the potential impact of new technologies

von Schack, Thomas (Autor), ... Hagan, John Elvis (Autor), Essig, Kai (Autor)
Erschienen in International journal of sport psychology, 51 (2020), 6 (Special issue 1970-2020 : 50 years of the International Journal of Sport Psychology), S. 667-688, Lit.

Passion play : embracing new scientific perspectives for improved sport psychology consulting

von Hagan, John Elvis (Autor), ... Schack, Thomas (Autor), Koester, Dirk (Autor)
Erschienen in SOJ psychology, 5 (2018), 1, S. 1-5, Lit.

New technologies in sport psychology practice

von Schack, Thomas (Autor), ... Hagan, John Elvis (Autor), Essig, Kai (Autor)
Erschienen in The Routledge international encyclopedia of sport and exercise psychology : applied and practical measures. Volume 2, London, New York (N.Y.): Routledge (Verlag), 2020, S. 458-472, Lit.

Elite athletes’ in-event competitive anxiety responses and psychological skills usage under differing conditions

von Hagan, John Elvis (Autor), ... Pollmann, Dietmar (Autor), Schack, Thomas (Autor)
Erschienen in Frontiers in psychology, 8 (2017), Art.-ID 2280, [11 S.], Lit.

Assessing the Quality of Physical Environments of Early Childhood Schools within the Cape Coast Metropolis in Ghana Using a Sequential Explanatory Mixed-Methods Design

von Amissah-Essel, Salome (Autor), ... Hagan, John Elvis (Autor), Schack, Thomas (Autor) 2020

Sport psychology practice in Africa : do culture-specific religion and spirituality matter?

von Hagan, John Elvis (Autor), ... Schack, Thomas (Autor), Schinke, Robert J. (Autor)
Erschienen in Advances in social sciences research journal, 6 (2019), 3, S. 183-197, Lit.

Assessing the quality of physical environments of early childhood schools within the Cape Coast Metropolis in Ghana using a sequential explanatory mixed-methods design

von Amissah-Essel, Salome (Autor), ... Hagan, John Elvis (Autor), Schack, Thomas (Autor)
Erschienen in European journal of investigation in health, psychology and education, 10 (2020), 4, S. 1158-1175, Lit.

Imagining interceptions : eye movements as an online indicator of covert motor processes during motor imagery

von D'Aquino, Alessio (Autor), ... Frank, Cornelia (Autor), Hagan, John Elvis (Autor), Schack, Thomas (Autor)
Erschienen in Frontiers in human neuroscience, 16 (2022), Art.-ID 940772; [15 S.], Lit.

Elite student-athletes' perceptions of coaches' behavior during the 23rd world universiade games in Kazan, Russia

von Hagan, John Elvis (Autor), ... Ansah, Edward Wilson (Autor), Pollmann, Dietmar (Autor), Schack, Thomas (Autor)
Erschienen in International journal of human movement and sports sciences, 5 (2017), 4, S. 68-76, Lit.

Assessing the prevalence, sources and selective antecedents of organizational stressors among elite football players and coaches in the Ghana premier league: Empirical evidence for...

von Srem-Sai, Medina (Autor), ... Hagan, John Elvis (Autor), Ogum, Prosper Narteh (Autor), Schack, Thomas (Autor) 2022

Data from: Exploring temporal patterning of psychological skills usage during the week leading up to competition: lessons for developing intervention programmes

von Hagan Jr., John E. (Autor), ... Pollmann, Dietmar (Autor), Schack, Thomas (Autor), Hagan, John Elvis (Autor) 2018

Assessing the prevalence, sources and selective antecedents of organizational stressors among elite football players and coaches in the Ghana premier league : empirical evidence fo...

von Srem-Sai, Medina (Autor), ... Hagan, John Elvis (Autor), Ogum, Prosper Narteh (Autor), Schack, Thomas (Autor)
Erschienen in Frontiers in sports and active living, 4 (2022), Art.-ID 938619, [13 S.], Lit.

Managing overweight and obesity in Ghana from a cultural lens : the complementary role of behaviour modification

von Hagan, John Elvis (Autor), ... Nsiah-Asamoah, Christiana (Autor), Hormenu, Thomas (Autor), Pollmann, Dietmar (Autor), Schack, Thomas (Autor)
Erschienen in Journal of preventive medicine and care, 2 (2018), 2, S. 18-31, Lit.

Cross-cultural applicability of organizational stressor indicator for sport performers questionnaire in Ghana using structural equation modeling approach

von Srem-Sai, Medina (Autor), ... Quansah, Frank (Autor), Frimpong, James Boadu (Autor), Hagan, John Elvis (Autor), Schack, Thomas (Autor)
Erschienen in Frontiers in psychology, 12 (2021), Art.-ID 772184, [10 S.], Lit.

Examining pregnancy related socio-cultural factors among adolescent girls in the Komenda-Edina-Eguafo-Abrem Municipality in the central region of Ghana : a case-control study

von Ahinkorah, Bright Opoku (Autor), ... Hagan, John Elvis (Autor), Seidu, Abdul-Aziz (Autor), Mintah, Joseph Kwame (Autor), Sambah, Francis (Autor), Schack, Thomas (Autor), Hormenu, Thomas (Autor)
Erschienen in Frontiers in public health, 7 (2019), Art.-ID 93, [9 S.], Lit.