Nichola Callow

Measurement of transformational leadership and its relationship with team cohesion and performance level

The present study explored the construct validity of a Differentiated Transformational Leadership Inventory and its relationship with team cohesion and performance level. Three hundred and nine club standard ultimate Frisbee players in the United Kingdom (mean age = 24.30 years, SD = 3.90) completed an adapted version of Hardy, Arthur, Jones, Shariff, Munnoch, Isaacs, and Allsopp et al.s (in press) Differentiated Transformational Leadership Inventory and the Group Environment Questionnaire (Carron, Widmeyer, & Brawley, 1985). Confirmatory factor analysis revealed evidence for the factorial and discriminant validity of the leadership inventory. Furthermore, results demonstrated that the leadership behaviors of fostering acceptance of group goals and promoting team work, high performance expectations, and individual consideration significantly predicted task cohesion; and fostering acceptance of group goals and promoting teamwork significantly predicted social cohesion. Performance level moderated these relationships. These results are discussed with reference to the conceptualization and measurement of transformational leadership, and how coaches’ leadership behaviors may influence cohesion depending on the level of athletes’ performance.

Types of Imagery Associated with Sport Confidence in Netball Players of Varying Skill Levels

Abstract Martin, Moritz, and Halls (1999) applied mental imagery model was developed to provide an organizational framework to guide future imagery usage research and application. The present study explores 2 aspects of the applied model: the relationship between imagery type and confidence, and 2 possible moderating variables, skill level of the athlete and sport type. One hundred and twenty-three female county netball players participated in the study; 55 from a low standard county and 68 from a high standard county. Participants were administered the Sport Imagery Questionnaire (SIQ). One week later, at a county netball match, the State Sport Confidence Inventory (SSCI) was administered. Hierarchical multiple regression analyses showed that in the lower standard sample, mastery imagery and imagery related to strategies of the game accounted for a significant proportion of the variance in sport confidence. Additionally, imagery related to the emotions of playing predicted confidence negatively. With the higher standard sample, goal achievement oriented imagery was the only significant predictor of variance in confidence. The results are discussed in relation to the pertinence of, and function that, different imagery types have for performers.

Imagery use by injured athletes : A qualitative analysis

Abstract The purpose of this study was to expand our knowledge and increase our understanding of imagery use by athletes in sport-injury rehabilitation using a qualitative approach. The participants were 10 injured athletes who were receiving physiotherapy at the time they were interviewed. During the interviews, the athletes provided extensive information about their use of imagery during injury rehabilitation and it was clear that they believed imagery served cognitive, motivational and healing purposes in effectively rehabilitating an injury. Cognitive imagery was used to learn and properly perform the rehabilitation exercises. They employed motivational imagery for goal setting (e.g. imagined being fully recovered) and to enhance mental toughness, help maintain concentration and foster a positive attitude. Imagery was used to manage pain. The methods they employed for controlling pain included using imagery to practise dealing with expected pain, using imagery as a distraction, imagining the pain dispersing, and using imagery to block the pain. With respect to what they imaged (i.e. the content of their imagery), they employed both visual and kinaesthetic imagery and their images tended to be positive and accurate. It was concluded that the implementation of imagery alongside physical rehabilitation should enhance the rehabilitation experience and, therefore, facilitate the recovery rates of injured athletes. Moreover, it was recommended that those responsible for the treatment of injured athletes (e.g. medical doctors, physiotherapists) should understand the benefits of imagery in athletic injury rehabilitation, since it is these practitioners who are in the best position to encourage injured athletes to use imagery.

The relationship between the use of kinaesthetic imagery and different visual imagery perspectives

In two studies, we examined the strength of relationship between internal and external visual imagery with kinaesthetic imagery. In Study 1, 56 participants completed the Vividness of Movement Imagery Questionnaire and the Movement Imagery Questionnaire. Pearsons product–moment correlations failed to reveal a significant correlation between external visual imagery and kinaesthetic imagery. However, the correlation between internal visual imagery and kinaesthetic imagery approached significance. In Study 2, the instructional set of the Vividness of Movement Imagery Questionnaire was changed to make the participant the ‘agent’ of the external visual perspective images rather than somebody else. Sixty-four participants completed the two questionnaires. The results indicated a significant correlation between external visual imagery and kinaesthetic imagery (r = 0.60, P <0.01). However, the correlation between internal visual imagery and kinaesthetic imagery was non-significant (r = 0.23, P >0.01). The results are discussed in relation to who is the agent of the image and the processes that may underlie kinaesthetic imagery. The implications for researchers trying to establish the functional, behavioural and neurological differences within, and across, imagery modalities are considered.

Effects of Dynamic and Static Imagery on Vividness of Imagery, Skiing Performance, and Confidence

The present study examined the effects of dynamic and static imagery on the vividness of imagery, down-hill ski-slalom performance, and confidence. An opportunistic sample of 24 race-standard skiers were randomly assigned to one of three groups; a dynamic imagery group, a static imagery group or a control group. Participants in the first two groups were administered an imagery script instructing them to imagine themselves completing the down-hill ski-slalom course. In addition, the dynamic group conducted the imagery in their ski equipment on the ski slope, where as, the static group conducted their imagery away from the snow, while seated in a chair. Once participants completed the imagery scripts, they were administered Hales (1998) imagery vividness evaluation form. Participants in the control group conducted light stretches. After completing the respective imagery and light stretches, participants skied the course and then completed a post-experimental questionnaire. The time taken to complete each run was recorded. An independent t-test revealed a significant difference between the two imagery groups in terms of vividness of imagery, t = (16) = -3.28, p <.005 and confidence t = (16) = -3.59, p <.002. Visual inspection of the cell means indicated that the dynamic group had higher vividness and confidence scores than the static group. A one-way analysis of variance revealed a significant difference between the groups in the time taken to complete the course, F(2,21)=3.37, p < .05. Follow-up Tukeys tests indicated a significant difference between the control group and dynamic imagery group, with visual inspection of the means revealing that the dynamic group completed the task in the quickest time. The results are discussed in terms of dynamic imagery aiding the representational display in short-term working memory, and the use of dynamic imagery in applied settings.

Performance improvements from imagery: evidence that internal visual imagery is superior to external visual imagery for slalom performance

We report three experiments investigating the hypothesis that use of internal visual imagery (IVI) would be superior to external visual imagery (EVI) for the performance of different slalom-based motor tasks. In Experiment 1, three groups of participants (IVI, EVI, and a control group) performed a driving-simulation slalom task. The IVI group achieved significantly quicker lap times than EVI and the control group. In Experiment 2, participants performed a downhill running slalom task under both IVI and EVI conditions. Performance was again quickest in the IVI compared to EVI condition, with no differences in accuracy. Experiment 3 used the same group design as Experiment 1, but with participants performing a downhill ski-slalom task. Results revealed the IVI group to be significantly more accurate than the control group, with no significant differences in time taken to complete the task. These results support the beneficial effects of IVI for slalom-based tasks, and significantly advances our knowledge related to the differential effects of visual imagery perspectives on motor performance.

Transformational leadership and task cohesion in sport: The mediating role of inside sacrifice

In this cross-sectional study, we examined a mediational model whereby transformational leadership is related to task cohesion via sacrifice. Participants were 381 American (Mage = 19.87 years, SD = 1.41) Division I university athletes (188 males, 193 females) who competed in a variety of sports. Participants completed measures of coach transformational leadership, personal and teammate inside sacrifice, and task cohesion. After conducting multilevel mediation analysis, we found that both personal and teammate inside sacrifice significantly mediated the relationships between transformational leadership behaviors and task cohesion. However, there were differential patterns of these relationships for male and female athletes. Interpretation of the results highlights that coaches should endeavor to display transformational leadership behaviors as they are related to personal and teammate inside sacrifices and task cohesion.

Watch me if you can: imagery ability moderates observational learning effectiveness

Recent research has revealed similarities in brain activity during observational learning and motor execution. However, whilst action develops visual, motor and afferent representations during acquisition, action-observation has been proposed to only develop visual-spatial learning via visual representation. In addition, it has been suggested that the vividness of visual representations are determined by imagery ability. Thus, the purpose of the current investigation was to explore the possible moderating role of imagery ability in the effectiveness of observational learning. Participants (n = 40) were assessed on their imagery ability via the Vividness of Movement Imagery Questionnaire-2 (VMIQ-2) and then assigned to one of four groups; high imagery ability and observational learning (HIA-OL), low imagery ability and observational learning (LIA-OL), high imagery ability control (HIA-C) and low imagery ability control (LIA-C). Following group allocation all participants performed a pre-test consisting of five actual practice trials of a novel gymnastics routine. The HIA-OL and LIA-OL groups then participated in a 14 day observational learning intervention whilst the HIA-C and LIA-C groups acted as controls. Following this, participants performed a post test, which was identical in nature to the pre-test, before finally completing the VMIQ-2 again. Performance on both the pre-test and post test was evaluated by two qualified gymnastics judges. Results revealed that gymnastics performance increased from pre-test to post test for both the HIA-OL and LIA-OL groups. However, this effect was greater in the HIA-OL group suggesting that the relationship between observational learning and successful imitation performance is moderated by imagery ability.

Kinesthetic Imagery Provides Additive Benefits to Internal Visual Imagery on Slalom Task Performance

Recent brain imaging research demonstrates that the use of internal visual imagery (IVI) or kinesthetic imagery (KIN) activates common and distinct brain areas. In this paper, we argue that combining the imagery modalities (IVI and KIN) will lead to a greater cognitive representation (with more brain areas activated), and this will cause a greater slalom-based motor performance compared with using IVI alone. To examine this assertion, we randomly allocated 56 participants to one of the three groups: IVI, IVI and KIN, or a math control group. Participants performed a slalom-based driving task in a driving simulator, with average lap time used as a measure of performance. Results revealed that the IVI and KIN group achieved significantly quicker lap times than the IVI and the control groups. The discussion includes a theoretical advancement on why the combination of imagery modalities might facilitate performance, with links made to the cognitive neuroscience literature and applied practice.

Author accepted manuscript: Action dual-tasks reveal differential effects of visual imagery perspectives on performance

Imagery research has identified two main visual perspectives, external visual imagery (EVI, third person) and internal visual imagery (IVI, first person). Based upon findings from brain imaging literature showing that different neural substrates are recruited for IVI and EVI perspectives, and that IVI activates motor system brain areas, we hypothesised that a concurrent action dual task would cause greater interference in performance for IVI than EVI. In a first experiment, participants were allocated to either an IVI or an EVI group, and were tasked with moving an onscreen marker towards a target in three blocked conditions: imagery, imagery with a concurrent motor dual-task of sequencing, and a math control. An interaction between imagery group and condition was driven by greater root mean square error for participants in the dual-task condition in the IVI group compared with the EVI group. We replicated the experiment with an eye-tracking objective measure of IVI; the results again showed that participants in the IVI group made more errors in motor movements, and an interference effect in eye movements, during the dual-task sequencing condition compared with the EVI group. The results of the two experiments reveal that a secondary motor task does interfere with IVI, providing behavioural evidence that IVI appears to rely on motor system processes more than EVI. These results have important implications for the use of visual imagery perspectives across a number of domains, with this paper being an essential reference for those conducting visual imagery perspectives research.