This thesis is written as a collection of three research papers detailing six studies, through which imagery perspectives, imagery ability, and personality, were investigated. Studies 1 and 2 explored the effects of internal visual imagery and external visual imagery on the performance of slalom-based motor tasks that require an effective use of line for a successful performance. Study 1 provided support for the beneficial effects of internal visual imagery over external visual imagery for the performance of slalom-based tasks; however Study 2 only provided some additional support. In Studies 3-5, an existing imagery ability questionnaire was adapted to bring it in line with contemporary views on imagery perspectives and kinaesthetic imagery. More specifically, in Study 3, the instructional set of this questionnaire was altered so as to be able to assess 3 factors: internal visual imagery, external visual imagery and kinaesthetic imagery ability. Following confirmatory factor analysis
procedures and item deletion an acceptable model fit was provided, supporting the 3-factor structure of the questionnaire. Further analyses also supported the
delineation of internal visual imagery and kinaesthetic imagery as separate
modalities. Study 4 confirmed the factorial validity of this questionnaire with a
different sample, and Study 5 provided initial support for the concurrent and
construct validity of this questionnaire. Study 6 examined the effect of narcissism on the efficacy of imagery perspectives on golf putting performance. High narcissists using external visual imagery displayed performance improvements, whereas high narcissists using internal visual imagery did not. The performance of low narcissists remained relatively constant regardless of imagery perspective used. The results highlight narcissism as a moderator of imagery perspective effectiveness.