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| 2. |
- Chan, Derwin, et al.
(författare)
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Response-Order Effects in Survey Methods : A Randomized Controlled Crossover Study in the Context of Sport Injury Prevention
- 2015
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Ingår i: Journal of Sport & Exercise Psychology (JSEP). - Champaign, IL : Human Kinetics. - 0895-2779 .- 1543-2904. ; 37:6, s. 666-673
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Tidskriftsartikel (refereegranskat)abstract
- Consistency tendency is characterized by the propensity for participants responding to subsequent items in asurvey consistent with their responses to previous items. This method effect might contaminate the results ofsport psychology surveys using cross-sectional design. We present a randomized controlled crossover studyexamining the effect of consistency tendency on the motivational pathway (i.e., autonomy support → autonomousmotivation → intention) of self-determination theory in the context of sport injury prevention. Athletesfrom Sweden (N = 341) responded to the survey printed in either low interitem distance (IID; consistencytendency likely) or high IID (consistency tendency suppressed) on two separate occasions, with a one-weekinterim period. Participants were randomly allocated into two groups, and they received the survey of differentIID at each occasion. Bayesian structural equation modeling showed that low IID condition had strongerparameter estimates than high IID condition, but the differences were not statistically significant.
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| 3. |
- Clement, Damien, et al.
(författare)
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Investigating the influence of intra-individual changes in perceived stress symptoms on injury risk in soccer.
- 2018
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Ingår i: Scandinavian Journal of Medicine and Science in Sports. - Chichester : John Wiley & Sons. - 0905-7188 .- 1600-0838. ; 28:4, s. 1461-1466
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Tidskriftsartikel (refereegranskat)abstract
- Research has shown that high levels of stress and stress responsivity can increase the risk of injuries. However, most of the research that has supported this notion has focused on between-person relationships, ignoring the relationships at the within-person level. As a result, the objective of this study was to investigate if within-person changes in perceived stress symptoms over a one-month time period could predict injury rates during the subsequent three months. A prospective design with two measurement points (Time 1 - at the beginning of the season and Time 2 - one month into the season) was utilized. A total of 121 competitive soccer players (85 males and 36 females; Mage = 18.39, SD = 3.08) from Sweden and the United States completed the Kessler Psychological Distress Scale (KPDS) and a demographic sheet at Time 1. The KPDS was also completed at Time 2 and all acute injuries that occurred during the subsequent three-month period were recorded. A Bayesian latent change scores model was used to determine if within-person changes in stress symptoms could predict the risk of injury. Results revealed that there was a credible positive effect of changes in stress symptoms on injury rates, indicating that an increase in reported stress symptoms was related to an increased risk for injury. This finding highlights the importance of creating caring and supportive sporting environments and relationships and teaching stress management techniques, especially during the earlier portion of competitive seasons, to possibly reduce the occurrence of injuries. This article is protected by copyright. All rights reserved.
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| 4. |
- Ivarsson, Andreas, et al.
(författare)
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"Mirror, mirror, on the wall is there any evidence at all?” : Critical reflections on evidence in sport psychology research
- 2017
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Ingår i: Idrottsforskaren. - : Svensk förening för beteendevetenskaplig idrottsforskning (SVEBI). ; :2, s. 35-40
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- Two common objectives in sport and exercise psychology research are to determinate if there is a relationship between two or more variables or if an intervention is effective or not (i.e., casual effects). Based on results obtained from a research study we are often eager to conclude that there are strong (or weak) evidence for the proposed relationship or intervention. This procedure might seem straightforward but there are several problems and critical issues that influence researcher’s assessments of the level of evidence. Unfortunately many researchers in the sport and exercise psychology field does not acknowledge these problems and critical issues when interpreting study results, which leads to flawed conclusions about the level of evidence (Ivarsson & Andersen, 2016). In this article we will: (a) highlight what we believe are some of the most critical issues in the sport and exercise psychology field for assessing the level of evidence, and (b) provide suggestions for how to deal with these issues.
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| 5. |
- Ivarsson, Andreas, 1984-, et al.
(författare)
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Negative psychological responses of injury and rehabilitation adherence effects on return to play in competitive athletes : a systematic review and meta-analysis.
- 2017
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Ingår i: Open Access Journal of Sports Medicine. - Macclesfield : Dove Medical Press Ltd. (Dovepress). - 1179-1543. ; 8, s. 27-32
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Forskningsöversikt (refereegranskat)abstract
- Previous research offers evidence that psychological factors influence an injured athlete during the rehabilitation process. Our first objective was to conduct a systematic review and meta-analysis of the results from all published studies that examined the relationships among negative affective responses after sport injuries, rehabilitation adherence, and return to play (RTP). The second objective was to use a meta-analytic path analysis to investigate whether an indirect effect existed between negative affective responses and RTP through rehabilitation adherence. This literature review resulted in seven studies providing 14 effect sizes. The results from the meta-analysis showed that negative affective responses had a negative effect on successful RTP, whereas rehabilitation adherence had a positive effect on RTP. The results from the meta-analytic path analysis showed a weak and nonsignificant indirect effect of negative affective responses on RTP via rehabilitation adherence. These results underline the importance of providing supportive environments for injured athletes to increase the chances of successful RTP via a decrease in negative affective responses and increase in rehabilitation adherence.
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| 6. |
- Ivarsson, Andreas, 1984-, et al.
(författare)
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Prediction of injury risk in sports
- 2019
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Ingår i: Wiley StatsRef. - : John Wiley & Sons. - 9781118445112
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Bokkapitel (refereegranskat)abstract
- Sport injuries are a major problem associated with sport participation. To develop preventive strategies and programs, it is important to identify factors that will increase the likelihood of sport injuries. In most sport injury risk factor research, statistical analyses are performed; however, many of the most common statistical analyses provide limited information about predictors of sport injury risk. The common analyses used in previous studies do not acknowledge the complexity associated with investigating risk factors for sport injuries. To better capture this complexity, suggested in most theoretical frameworks, more appropriate of statistical approaches should be used. In this article we present how latent profile analysis, latent change score analysis, and latent growth curve analysis can be used to overcome some of the limitations with more traditional analyses. Lastly, we also elaborate on future directions for analyses in sport injury risk factor research. More specifically, we present how advanced statistical models, such as classification and regression trees (CART) analysis and random forest analysis, can be used to provide researchers and clinicians with results that are more clinically meaningful.
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| 7. |
- Ivarsson, Andreas, 1984-, et al.
(författare)
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Psychosocial factors and sport injuries: Meta-analyses for prediction and prevention
- 2017
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Ingår i: Sports Medicine. - Auckland : Springer Science and Business Media LLC. - 0112-1642 .- 1179-2035. ; 47:2, s. 353-365
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Tidskriftsartikel (refereegranskat)abstract
- Background Several studies have suggested that psychosocial variables can increase the risk of becoming injured during sport participation. Objectives The main objectives of these meta-analyses were to examine (i) the effect sizes of relationships between the psychosocial variables (suggested as injury predictors in the model of stress and athletic injury) and injury rates, and (ii) the effects of psychological interventions aimed at reducing injury occurrence (prevention). Methods Electronic databases as well as specific sport and exercise psychology journals were searched. The literature review resulted in 48 published studies containing 161 effect sizes for injury prediction and seven effect sizes for injury prevention. Results The results showed that stress responses (r = 0.27, 80 % CI [0.20, 0.33]) and history of stressors (r = 0.13, 80 % CI [0.11, 0.15]) had the strongest associations with injury rates. Also, the results from the path analysis showed that the stress response mediated the relationship between history of stressors and injury rates. For injury prevention studies, all studies included (N = 7) showed decreased injury rates in the treatment groups compared to control groups. Conclusion The results support the model’s suggestion that psychosocial variables, as well as psychologically, based interventions, can influence injury risk among athletes.
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| 8. |
- Ivarsson, Andreas, 1984-, et al.
(författare)
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The predictive ability of the talent development environment on youth elite football players' well-being : a person-centered approach
- 2015
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Ingår i: Psychology of Sport And Exercise. - Amsterdam : Elsevier. - 1469-0292 .- 1878-5476. ; 16:1, s. 15-23
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Tidskriftsartikel (refereegranskat)abstract
- Objective: The objective of this study was to examine the predictive ability of perceived talent development environment (TDE) on the well-being of youth elite football players.Design: A field-based longitudinal design was employed.Method: The participants were 195 Swedish youth elite football players between 13 and 16 years of age enrolled at Swedish football academies. The players responded to questionnaires regarding their perceptions of their TDE, perceived stress, and well-being in the beginning of the competitive season 2012 (T1). On two more occasions, six and 12 months later, the players completed the stress and well-being questionnaires.Results: A latent class analysis, based on the TDEQ sub-scale scores at T1, revealed three classes of players with different perceptions of their TDE (one high quality, one moderate quality, and one poor qualityclass). A second-order multivariate latent growth curve model (factor-of-curves model) showed that the class of players perceiving the lowest TDE quality, experienced higher initial level of stress and lower initial level of well-being at T1 compared to the other two classes. Moreover, there were no significant differences in slopes for neither stress nor well-being between classes (the initial difference between the three groups, in well-being, remained stable over time).Conclusion: The results indicate that players perceiving their TDE as supporting and focusing on long term development seem to be less stressed and experience higher well-being than other players. Hence, in addition to facilitate sport-specific development and performance among youth athletes, high quality TDEs may be important for youth elite athletes' general well-being.
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| 9. |
- Ivarsson, Andreas, et al.
(författare)
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Things We Still Haven't Learned (So Far)
- 2015
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Ingår i: Journal of Sport & Exercise Psychology (JSEP). - Champaign, IL : Human Kinetics. - 0895-2779 .- 1543-2904. ; 37:4, s. 449-461
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Tidskriftsartikel (refereegranskat)abstract
- Null hypothesis significance testing (NHST) is like an immortal horse that some researchers have been trying to beat to death for over 50 years but without any success. In this article we discuss the flaws in NHST, the historical background in relation to both Fisher's and Neyman and Pearson's statistical ideas, the common misunderstandings of what p < .05 actually means, and the 2010 APA publication manual's clear, but most often ignored, instructions to report effect sizes and to interpret what they all mean in the real world. In addition, we discuss how Bayesian statistics can be used to overcome some of the problems with NHST. We then analyze quantitative articles published over the past three years (2012-2014) in two top-rated sport and exercise psychology journals to determine whether we have learned what we should have learned decades ago about our use and meaningful interpretations of statistics.
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| 10. |
- Josefsson, Torbjörn, 1965-, et al.
(författare)
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Effects of Mindfulness-Acceptance-Commitment (MAC) on Sport-Specific Dispositional Mindfulness, Emotion Regulation, and Self-Rated Athletic Performance in a Multiple-Sport Population : an RCT Study
- 2019
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Ingår i: Mindfulness. - New York, NY : Springer. - 1868-8527 .- 1868-8535. ; 10:8, s. 1518-1529
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Tidskriftsartikel (refereegranskat)abstract
- ObjectivesThe aim of the study was to examine mediating effects of emotion regulation and sport-specific dispositional mindfulness on self-rated athletic training performance, following the Mindfulness-Acceptance-Commitment (MAC) intervention, compared to a Psychological Skills Training (PST) control group.MethodsSixty-nine competitive elite athletes who did not have any prior experience with mindfulness- and acceptance-based exercises, were recruited and randomly assigned into either a MAC group or a traditional PST group. Latent growth curve analyses were performed to examine longitudinal relationships among the study variables. Mediation analyses were conducted to test if the growth trajectory of each of the proposed mediators mediated the relationship between the intervention and perceived performance (measured at T3).ResultsFindings showed that the MAC intervention had an indirect effect on self-rated athletic training performance through changes in dispositional mindfulness and emotion regulation respectively. Further, the MAC- group obtained greater post-test improvements in athletic mindfulness, emotion regulation abilities, and perceived performance compared to the PST group.ConclusionsOverall, findings suggest that dispositional athletic mindfulness and emotion regulation may function as important mechanisms in MAC, and that the MAC approach is a more effective intervention compared to the PST condition in reducing emotion regulation difficulties, as well as enhancing sport-relevant mindfulness skills and perceived athletic training performance in elite sport.
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