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2. Likert scales, levels of measurement and the “laws” of statistics;Norman;Advances in Health Sciences Education,2012
3. What is this thing called Mental Toughness? An investigation with elite performers;Jones;Journal of Applied Sports Psychology,2002
4. Becoming a world or Olympic champion: a process rather than an end result;Durand-Bush,2001
5. Personality and sport: a comprehensive view;Vealey,1992