Thesis (Ph. D.)--University of Missouri-Columbia, 2005. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (November 14, 2006) Vita. Includes bibliographical references.

Self-efficacy has consistently distinguished between highly successful and less successful athletes. Given this relationship there is demand in sport to have strategies to enhance self-efficacy. The use of motivational general-mastery (MG-M) imagery is an effective psychological technique to enhance self-efficacy. What moderates the effectiveness of this technique is the athlete’s ability to use MG-M imagery. A single-subject multiple baseline design was employed where inter-collegiate golfers (n = 3; male) completed baseline and post-intervention measures: Motivational Imagery Ability Measure for Sport and the Golf Self-Efficacy Questionnaire. Participants completed the Competitive State Anxiety Inventory prior to each competition and the score recorded for each round of golf was used to evaluate performance. Participants engaged in six sessions of guided MG-M imagery training over a 3-week period. The results of the study demonstrated that the sport confidence and golf self-efficacy of Participants 2 and 3 improved, while Participant 1 remained at a relatively constant level. All participants showed improved imagery ability and Participants 1 and 3 demonstrated improved golf performance. Post-experimental interviews indicated all participants felt the imagery training program was effective and appropriate for their sport.

Self-efficacy has consistently distinguished between highly successful and less successful athletes. Given this relationship there is demand in sport to have strategies to enhance self-efficacy. The use of motivational general-mastery (MG-M) imagery is an effective psychological technique to enhance self-efficacy. What moderates the effectiveness of this technique is the athlete’s ability to use MG-M imagery. A single-subject multiple baseline design was employed where inter-collegiate golfers (n = 3; male) completed baseline and post-intervention measures: Motivational Imagery Ability Measure for Sport and the Golf Self-Efficacy Questionnaire. Participants completed the Competitive State Anxiety Inventory prior to each competition and the score recorded for each round of golf was used to evaluate performance. Participants engaged in six sessions of guided MG-M imagery training over a 3-week period. The results of the study demonstrated that the sport confidence and golf self-efficacy of Participants 2 and 3 improved, while Participant 1 remained at a relatively constant level. All participants showed improved imagery ability and Participants 1 and 3 demonstrated improved golf performance. Post-experimental interviews indicated all participants felt the imagery training program was effective and appropriate for their sport.

Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (leaves 76-81).

Abstract Background: Golf is a sport with a growing focus on the physical aspect of the game and its relationship to performance. Studies have determined a correlation between club head speed and performance in golf. Rotational power has proven to be an important factor for the club head speed. By examining the relationship between club head speed and rotational power, researchers has found that rotation power on the golfers dominant side have a moderate to high correlation with club head speed. Previous research has mostly investigated the peak rotational power on the dominant side. Furthermore, additional research is needed to examine the bilateral strength and its relationship to club head speed. Aim: The aim of this study was to examine the correlation between peak trunk rotational power and club head speed in elite golfers, and also to study the impact of bilateral rotational strength on club head speed. Methods: The study included 27 elite golf players (21 males, 6 females) age 19±2 years. The subjects attended two sessions where the first session included a club head speed test and the second session a rotation power test in the Quantum machine. The rotational peak power ratio (dominant/non-dominant side) were ranged from 1-27 (the closer to 1, the higher order) to study a linier relationship with club head speed. Spearman’s nonparametric rank correlations coefficient (rs) was used since the data was not normally distributed. Results: There was a moderate correlation between peak trunk rotational power on the dominant side and club head speed ( rs=0.58, p=0.01). The correlation between the peak trunk rotational powers on the dominant and non- dominant side was high, rs=0.82 (p=0.01). There were no significant correlation found between the ranged rotational peak power ratio and club head speed (rs=0.30, p=0.1). Conclusion: The current study found a slightly lower correlation between peak trunk rotational power and club head speed than found in earlier studies. The golfers in this study had symmetric strength in the trunk, other studies have shown that the rotational strength in golfer´s dominant side were higher than of the non- dominant side. The result of this study indicates that balance between the sides not necessarily has a relationship with how high the golfer’s club head speed is. Future research is needed to analyze the quadratic correlation between ratio and club head speed on a more advanced level. The results of this study can, if validated, be used for further researching and understanding of club head speed and golf performance.

Abstract Introduction: Ball trajectory in the golf swing is an important outcome variable for golf performance, however, no direct investigation of ball flight trajectory variability for pre-elite players has been conducted. Purpose: The purpose of this study was to examine correlations between average score and ball trajectory variability (for carry and lateral displacement) on pre-elite golfers both at and between two different clubs.  Methods: Sixteen pre-elite/elite golfers were included in the study, 11 men and 5 women with a mean age of 22 ±2 (SD). An actual average (mean) score was calculated for each player’s first ten competition rounds. Subjects were then instructed to hit 5 balls, with focus on consistency, with their seven iron and then hit 5 balls approximately 70 metres with their preferred wedge. Ball trajectory variables were recorded using a Flightscope® Kudo Doppler radar launch monitor system (EDH South Africa (PTY) Ltd). Statistical calculation of averages, standard deviation (SD), normalised root-mean, coefficient of variance, performance error index (PEI= and Pearson’s correlation. Results: The results from the present study showed there was no significant correlation between average score (76.2 ±1.9) and variability of ball trajectory, for the seven iron or wedge. Results also showed average seven iron CV for carry and lateral PEIdisplacement was 5% and 3% respectively, whilst average wedge carry CV for carry and lateral PEIdisplacement was 9% and 2% respectively.  Carry CV and Lateral CV PEI were moderately correlated (r=0.61, p=0.012) with each other for the wedge. Conclusion: : Our findings show no correlation between shot variability and golf score, however we found weak correlation between carry and lateral variability for the wedge. In order for effective coaching more understanding into the importance of biomechanical variability and golf performance is required, further research is needed to better understand the implication of our findings

The purpose of this study was to examine the factorial validity and measurement equivalence of the Test of Performance Strategies (TOPS; Thomas, Murphy, & Hardy, 1999); the Sport Anxiety Scale (SAS; Smith, Smoll, & Schultz, 1990); and the Golf Performance Survey (GPS; Thomas & Over, 1994) across age groups in a representative sample of amateur golfers. Based on archival data, participants comprising this study were 649 younger adult (n = 237) and older adult (n = 412) amateur golfers who played in the Dupont World Amateur Golf Championship in Myrtle Beach, South Carolina. The participants completed a set of questionnaires including psychological skills and strategies (e.g., self-talk, goal setting, imagery, etc.) used during competition, sport-specific competitive trait anxiety, and psychomotor skills and involvement in golf. Results demonstrated that the original factor structure of the TOPS competition subscale, the SAS, and the GPS, did not adequately fit the data among this sample of younger and older adult amateur golfers. Further exploratory and confirmatory factor analyses established evidence of factorial validity with the TOPS competition subscale, SAS, and the GPS with both younger and older adult amateur golfers. Configural, metric, scalar, and strict measurement invariance were identified in relation to the TOPS competition subscale, SAS, and the GPS across age cross-group comparisons. In general, the analyses demonstrated support that the TOPS competition subscale, SAS, and the GPS can be utilized with confidence with older adult amateur golfers, as well as conducting group comparisons with younger adult amateur golfers. The findings from this study have several future research directions and practical implications for structuring effective interventions with older adult amateur athletes.