Background There is a growing body of empirical evidence on demographic and
psychosocial predictors of doping intentions and behaviors utilizing a variety of variables …

This study tested the replicability and cross-cultural invariance of a trans-contextual model of
motivation across 4 samples from diverse cultures. The model proposes a motivational …

During the last decade, cyberbullying has become an increasing concern which has been
addressed by diverse theoretical and methodological approaches. As a result there is a …

In the past decade, a body of evidence has reported that dietary supplement use is related to
prohibited performance enhancing substance use (ie, doping). To help international and …

Background The creation of the World Anti-Doping Agency in 1999 and the first
implementation of the Anti-Doping Code in 2004 established institutional and legal level …

Self‐determination theory provides an integrated conception of school‐and academic
motivation. The theory proposes a continuum comprising three types of motivation: intrinsic …

The present study tested the cross-cultural generalizability of the measurement and
structural parameters of the theory of planned behavior (TPB) among youth in a physical …

Using confirmatory factor analyses, we examined method effects on Rosenberg's Self-
Esteem Scale (RSES; Rosenberg, 1965) in a sample of older European adults. Nine …

Objective The present study set out to investigate which role empathy plays in traditional
bullying and cyberbullying in a sample of adolescents from Greece and Spain. Furthermore …

Background. The trans‐contextual model (TCM) is an integrated model of motivation that
aims to explain the processes by which agentic support for autonomous motivation in …