This study examined the effects of differing frequencies of PETTLEP imagery on netball shooting performance.
psychology
Description
Impact of Differing Frequencies of PETTLEP
Imagery on Netball Shooting Performance∗
Caroline J. Wakefield and Dave Smith
Abstract
This study examined the effects of differing frequencies of PETTLEP imagery on netball
shooting performance. Thirty-two female participants were divided into four groups: PETTLEP
imagery once per week (1x/wk), PETTLEP imagery twice per week (2x/wk), PETTLEP imagery
three times per week (3x/wk) and a control. During the pre-test and post-test participants were
required to complete a total of twenty shots from five different points within the shooting zone.
They were awarded points (out of five) for each shot, giving a possible total of 100 points. The
numbers of shots scored was also recorded. Following the pre-test, the imagery participants imaged the twenty shots the required number of times per week. The control group completed some
netball specific stretching. Transfer tests were also completed to assess the transferability of the
intervention to related tasks. Group x test ANOVAs for performance score and shots scored revealed a significant interaction effect (p<.01). Tukey tests revealed that the 3x/wk imagery group
improved performance on both measures, whereas the 2x/wk, 1x/wk and control group did not.
These results support the notion that PETTLEP imagery may be more effective if completed at
least three times per week
Imagery is one of the most widely-researched topics in sport psychology
(Smith & Wright, 2008), and during the past two decades we have begun to
understand much about how imagery works and how best to apply it to enhance
performance. Of particular interest in recent years have been the findings from the
field of neuroscience, where it has been well established that imagery and
physical performance share some common neural mechanisms, a phenomenon
termed ‘functional equivalence’ (Jeannerod, 1997). Drawing on this line of
research, as well as findings from cognitive psychology and sport psychology,
Holmes and Collins (2001) developed the PETTLEP model (Physical,
Environment, Task, Timing, Learning, Emotion and Perspective), which provides
practical guidelines to enhance the effectiveness of imagery interventions. For
brevity, we refer readers to Holmes and Collins (2002), Smith, Wright, Allsopp
and Westhead (2007) and Smith, Wright and Cantwell (2008) for a detailed
description of the different components of the model and their practical
applications. Initial studies are strongly supportive of the model. For example,
Smith et al. (2007) found that a greater performance increase was apparent in
hockey and gymnastics tasks when more components of the model were included.
Smith et al. (2008) produced similar findings using a golf bunker shot task.
Wright and Smith (2006) found that PETTLEP imagery interventions produced
greater improvements in computer game performance than more traditional
imagery methods.
Whilst the above studies clearly show that PETTLEP imagery can have
powerful effects on motor performance, it is still unclear how much PETTLEP
imagery is required to produce optimal results. Blair, Hall and Leyshon noted
over a decade ago that “we can offer few specific answers to such basic questions
as when, where, how and how often should athletes be encouraged to use
imagery” (1993, p.95). The development of the PETTLEP model, and the related
research, is beginning to answer the specifics of when, where and how imagery
should be performed, but the quantity of imagery required to have a positive
effect on performance is yet to be investigated. Therefore, this is the aim of the
present study: to test the effects of different frequencies of PETTLEP imagery on
a specific motor task. In line with the notion of deliberate imagery practice
(Cumming & Hall, 2002), we hypothesise that the more frequent the imagery
intervention, the greater the performance improvement will be.
