1. Department of Pedagogy and Psychology, University of Security, 60-778 Poznan, Poland
2. Institute of Materials Technology, Poznan University of Technology, 61-138 Poznan, Poland
3. Department of Spine Disorders and Pediatric Orthopedics, Poznan University of Medical Sciences, 61-545 Poznan, Poland
4. Department of Psychology and Cognitive Sciences, Adam Mickiewicz University, 60-547 Poznan, Poland
5. Department of Pediatric Orthopaedics and Traumatology, Poznan University of Medical Sciences, 61-545 Poznan, Poland