SUMMARY
The present study examined the essential factors that truly motivated youth athletes participated in Volleyball practices and competitions using the Adapted Questionnaire of Volleyball Athletes Motivation-Chinese Version. Participants were 92 youth volleyball athletes (age 14-17) from 15 schools of Nanjing City, China. Data analysis was done by a 2 Gender (boy or girl) x 2 Education-levels (high-school or middle-school) x 2 School-types (sport-school or regular-school) multivariate analysis of variance (MANOVA). Findings included: the top five higher scores from the 19 RFs were: RF1 Technical-content and unique-value M ± SD = 4.30 ± .83; RF17 For extraordinary-skills M ± SD = 4.24 ± 1.04; R3 For health M ± SD = 4.11 ± 1.02; RF12 Improve own-literacy M ± SD = 4.00 ±1.26; RF9 become healthier M± SD = 3.58 ±1.13. These RFs possess significant higher impact on the participantsmotivations. The results of the MANOVA revealed that: two out of three independent variables reached meaningful significantly difference level (p < .00), wherein in Genderaspect, Λ = .37, F = 5.92 with boys athletes motivation score significantly higher (p < .00) than the girls athletes; (2) in School-types aspect, Λ = .24, F =11.17 with sport-school players motivation score significantly higher (p < .00) than the regular-school players.