@article{paperid:1069874, author = {A. Heydari and H. Soltani and Mohammadi-nezhad, Mahdi}, title = {The Effect of Psychological Skills Training (Goal Setting, Positive Selftalk and Imagery) on Self-Confidence of Adolescent Volleyball Players}, journal = {Pedagogics, psychology, medical - biological problems of physical training and sports}, year = {2018}, volume = {22}, number = {4}, month = {August}, issn = {1818-9172}, pages = {189--194}, numpages = {5}, keywords = {psychological skills training; trait; self-confidence.}, }