Randomization tests in single-subject designs: Illustrative examples

Randomization tests have recently been adapted for use in the analysis of single-subject data. The advantages of these tests lie in their ease of implementation and interpretation as well as their freedom from underlying distributions. Even though numerous articles and books have explicated randomization test procedures, due to the lack of appropriate examples, very little use of these procedures has been made by applied behavior analysts. Data sets reported in a prominent applied behavior journal are used to demonstrate the application of randomization tests to the following three single-subject design models: (a) two-phase random intervention point, (b) multiple phase, and (c) multiple phase with a predicted order of effect size.     

Assumptions in research in sport and exercise psychology

ObjectivesThe aim of this article is to outline how certain key assumptions affect the quality and interpretation of research in quantitative sport and exercise psychology.MethodsA review of three common assumptions made in the sport and exercise psychology literature was conducted. The review focused on three assumptions relating to research validity and the treatment and interpretation of observations. A central theme to this discussion is the assumption that research observations reflect true effects in a population.ResultsAssumptions often made in sport and exercise psychology research were identified in three key areas: (1) validity, (2) inferences of causality, and (3) effect size and the “practical significance” of research findings. Findings indicated that many studies made assumptions about the validity of the self-report psychological measures adopted and few provided a comprehensive evaluation of the validity of these measures. Researchers adopting correlational designs in sport and exercise psychology often infer causality despite such conclusions being based on theory or speculation rather than empirical evidence. Research reports still do not include effect size statistics as standard and confine the discussion of findings to statistical significance alone rather than commenting on “practical significance”.ConclusionResearch quality can only be evaluated with due consideration of the common assumptions that limits empirical investigation in sport and exercise psychology. We offer some practical advice for researchers, reviewers, and journal editors to minimise the impact of these assumptions and enhance the quality of research findings in sport and exercise psychology.     

A comparison of single-subject and traditional statistical designs in steady-state evoked potential research

An experiment was conducted to assess the relationship between level of auditory noise and a measure derived from the steady-state evoked potential (SSEP) called relative transmission time (RTF). The visual stimulus consisted of a 150-fL light that was modulated at 45, 48, or 51 Hz to a depth of 30%. The auditory stimulus was bandpass-limited white noise at 65, 75, or 85 dB, The outcomes of single-subject and group statistical analyses were compared. Neither statistic indicated a significant effect for cross-modal white noise on the SSEP. Whereas the more traditional group approach indicated only large between-subject variability, the single-subject approach clearly indicated deviant data of one of the subjects.     

Integrating sport psychology and sports medicine in research: The dilemmas

Abstract

The recent acceleration of interest in conducting sport psychology research within sports medicine settings has prompted an introspection on the stringency of sport injury-focused research protocols and methodology. Much of the literature relating to the psychology of sport injury is anecdotal, comprised of conjecture, or is an extrapolation from allied psychological study. In addition, retrospective studies, involving the recall of an unpleasant event (i.e., sport injury) proliferate the literature. Quality research that integrates sport psychology and sports medicine presents a unique challenge because of the multifactorial nature of sport injury and the necessity for sound interpretation of research outcomes relative to the nature of psychology. sport, and injury. Confounding and complicating aspects of this integrated research include definition of injury variables, timing of data collection. evaluation of pain. and the physiological sequelae of injury. Research and methodological issues relating to sport psychology and sport injury are discussed.     

Multilevel meta-analysis of single-subject experimental designs: A simulation study

One way to combine data from single-subject experimental design studies is by performing a multilevel meta-analysis, with unstandardized or standardized regression coefficients as the effect size metrics. This study evaluates the performance of this approach. The results indicate that a multilevel meta-analysis of unstandardized effect sizes results in good estimates of the effect. The multilevel meta-analysis of standardized effect sizes, on the other hand, is suitable only when the number of measurement occasions for each subject is 20 or more. The effect of the treatment on the intercept is estimated with enough power when the studies are homogeneous or when the number of studies is large; the power of the effect on the slope is estimated with enough power only when the number of studies and the number of measurement occasions are large.     

Reproducible research in sport and exercise psychology: The role of sample sizes

ObjectivesWe aim to introduce the discussion on the crisis of confidence to sport and exercise psychology. We focus on an important aspect of this debate, the impact of sample sizes, by assessing sample sizes within sport and exercise psychology. Researchers have argued that publications in psychological research contain numerous false-positive findings and inflated effect sizes due to small sample sizes.MethodWe analyse the four leading journals in sport and exercise psychology regarding sample sizes of all quantitative studies published in these journals between 2009 and 2013. Subsequently, we conduct power analyses.ResultsA substantial proportion of published studies does not have sufficient power to detect effect sizes typical for psychological research. Sample sizes and power vary between research designs. Although many correlational studies have adequate sample sizes, experimental studies are often underpowered to detect small-to-medium effects.ConclusionsAs sample sizes are small, research in sport and exercise psychology may suffer from false-positive results and inflated effect sizes, while at the same time failing to detect meaningful small effects. Larger sample sizes are warranted, particularly in experimental studies.     

Attribution in sport psychology: seeking congruence between theory,research and practice

ObjectivesThis paper urges revision of the way attributions are conceptualised, investigated, and applied in sport psychology. There has been a recent decline in attribution research in sport psychology, despite the generally accepted relevance of attributions in applied settings. In seeking closer links between attribution theory, research, and practice, we argue that there is a mismatch between research and practice in sport psychology.MethodsRelevant literature is reviewed and theoretical arguments offered within seven sub-headings: attribution theory in practice; linking consistency, distinctiveness, and consensus information to attribution dimensions; controllability as the primary attribution dimension; the generalisability of controllability; assessing attributions; implications for practice; and the social context.Results and conclusionsResearch within sport psychology should focus on the central issue of how controllability attributions generalise across time, situations, and people. Measurement should reflect this approach to research within the field of attributions and, to this end, researchers might consider using a variety of quantitative and qualitative methods of inquiry. Practitioners should use consistency, distinctiveness, and consensus information to challenge clients' attributional thinking and help them attain adaptive perceptions of controllability. Practitioners should also help clients to be their own psychologist. Future research and practice should include a consideration of the social context in which attributions are shaped.     

Applied sport psychology in canada

The present study sought to ascertain a contextualized perspective of established practitioners’ subjective reasoning underpinning their practices. An interpretive phenomenological analysis (Smith, 1996) was adopted as an in-depth qualitative approach to explore 9 UK-based applied sport psychologists’ perceptions and experiences. Three superordinate themes emerged: literature underpinning professional practice, the importance of the sport setting and context, and the need for professional judgment. The study provides a valuable insight into the influences on sport psychologists’ behavior, the role this plays when advising elite performers on allocation of their thought processes, and how such advice is operationalized and applied.     

Cognitive psychology in sport: Progress and prospects

ProblemThere has been a recent upsurge of research interest in cognitive sport psychology or the scientific study of mental processes (e.g., mental imagery) in athletes. Despite this interest, an important question has been neglected. Specifically, is research on cognitive processes in athletes influential outside sport psychology, in the “parent” field of cognitive psychology or in the newer discipline of cognitive neuroscience?ObjectivesThe purpose of this paper is to explore the theoretical significance of research on expertise, attention and mental imagery in athletes from the perspective of cognitive psychology and cognitive neuroscience.MethodFollowing analysis of recent paradigm shifts in cognitive psychology and cognitive neuroscience, a narrative review is provided of key studies on expertise, attention and mental imagery in athletes.Results and conclusionsThis paper shows that cognitive sport psychology has contributed significantly to theoretical understanding of certain mental processes studied in cognitive psychology and cognitive neuroscience. It also shows that neuroscientific research on motor imagery can benefit from increased collaboration with cognitive sport psychology. Overall, I conclude that the domain of sport offers cognitive researchers a rich and dynamic natural laboratory in which to study how the mind works.     

Applied sport psychology: Issues and challenges

Abstract

Achieving superior sport performance is often the result of well developed psychological skills (Morris &; Thomas, 1995). However, little is known about psychological skill development in athletes with disabilities (Hanrahan, 1998). The purpose of the present paper is to help sport psychologists in their work with athletes with physical disabilities. Although there are many similarities among athletes with and without disabilities, sport psychologists would benefit from an awareness of information unique to athletes with disabilities (Asken, 1991). I use a broad interpretation of psychological skills based on a holistic perspective and a personal development model (Vealey, 1988). Information is presented in the three areas of foundation, psychological, and facilitative skills, methods, and factors.     

The psychology of farming: A review of twenty-five years of research

If all of mankind is to have an adequate diet, we must both stabilize world population and increase markedly world food supply. Moreover, attaining any such increase in food supply may be as much a problem in vocational psychology (e.g. the skill, knowledge, openness to change, and motivation of farmers) as in agricultural technology. The purpose of this review is to further psychological work on agricultural productivity by listing and evaluating a cross-section of relevant articles since 1945. Because psychologists have largely ignored agriculture, most reviewed studies were conducted by other behavioral scientists. Studies are grouped according to three broad areas: (1) predictors of choice, success, and satisfaction; (2) adoption of recommended practices; and (3) communal agriculture.     

Applied sport psychology: A view from britain

Abstract

Based on the findings of a field study with youth sport coaches, contextual factors in youth sport arc considered. Youth sport is discussed as a “developmental intervention” (Birkel, Lerner, &; Smyer, 1989). Although past research has examined a variety of issues in youth sport (e.g., coaching behavior, participation motivation), the dynamics of the context have been largely ignored. It is argued that situational factors may have important implications for the quality of children's youth sport experiences. Data arc presented to show the significance of contextual factors in coaches' experiences. Examples of previous interventions aimed at manipulating contexts arc offered and suggestions for future interventions, based on the present study, arc discussed. The roles of parents. spectator location. rules, and time are discussed in detail.     

Developing mixed methods research in sport and exercise psychology: Critical reflections on five points of controversy

ObjectivesTo stimulate debate in sport and exercise psychology about the nature of mixed methods research as currently practiced and how this approach might develop in the future.DesignAn exploration of five points of controversy relating to mixed methods research.MethodA presentation of critical reflections on the following. (1) Mixing methods as a non-debate, (2) Purists, pragmatists and mixing paradigms, (3) Integrating findings and representational forms, (4) Judgment criteria and mixed methods research, and (5) Power, politics and what counts in mixed methods research.ResultsThe examples provided of mixed methods research in action indicate that a number of problematic issues regarding both process and product have been neglected.ConclusionsMixed methods research offers a number of conceptual, practical and pedagogical challenges that need to be addressed if this form of inquiry is to develop its full potential in sport and exercise psychology.     

Research quality considerations for grounded theory research in sport & exercise psychology

ObjectivesThe aims of this article are: to examine the application of grounded theory in sport and exercise psychology; to locate such applications within broader grounded theory methodological debates and; to support the future use and evolution of the method in the field.MethodsA search of the four sport and exercise psychology journals with the highest impact factors in 2007 (Psychology of Sport and Exercise, Journal of Sport and Exercise Psychology, Journal of Applied Sport Psychology and The Sport Psychologist) using the search term “grounded theory” and the date parameters 2000–2008 was conducted. These articles were discussed in relation to research quality concerns for grounded theory at the micro- and macro-level.ResultsTwelve articles were returned from the search. At the micro-level, eight elements representing collective sufficient conditions for grounded theory were discussed, which only two of the twelve articles returned met. Examples of common mistakes in relation to these elements were provided from the twelve articles. At the macro-level, the ontological and epistemological debates surrounding variants of grounded theory were discussed. Only one of the twelve articles explicitly recognised that there are variants of grounded theory, whilst the potential to generate more generic formal theory, and thus make a wider contribution to bodies of knowledge, was not discussed in any of the articles.ConclusionsThere are research quality concerns regarding the application of grounded theory in sport and exercise psychology at the micro- and macro-level, largely linked to a lack of understanding of the methodology and its implementation. Suggestions to address this for editors, reviewers and authors are offered.     

Peer relationships in physical activity contexts: a road less traveled in youth sport and exercise psychology research

Background and Purpose. While it is well established that social agents contribute to the quality of youth physical activity experiences, relatively little research has specifically explored peer relationships in physical activity settings. Rather, the bulk of research on social agents has focused on teachers, coaches, and parents. The purpose of this paper is to provide justification for pursuing youth peer relationships research and present conceptual and methodological issues of relevance to such efforts.Methods. The existing literature base on peer relationships in physical activity contexts is overviewed, emphasizing the contribution of peers to self-perceptions, moral attitudes and behaviors, affect, and motivation.Results and Conclusions. Promising future research directions are forwarded, focusing on (a) the possible contribution of peer relationships research to understanding self-presentational processes and developmental transitions, (b) the importance of examining the interaction of peer relationships and other social relationships in the physical activity context, and (c) the value of using the physical activity setting to promote quality peer relationships.     

A comprehensive analysis of the integration of team research between sport psychology and management

Both sports and organizations rely on teams. As such, the sport psychology and management literatures have contributed greatly to our understanding of team functioning. Despite this, previous reviews based on subsets of articles in these literatures indicate a lack of communication between them. In this article, we assess the state of integration between the entirety of the sport psychology and management literatures on teams by considering the full set of interconnected team articles in the SCOPUS database (6974 articles over 69 years). We use this data to conduct a combination of citation network analysis and content analysis via topic modeling to evaluate conceptual integration. The data show that interdisciplinary discussion between these two fields is lacking, particularly regarding the integration of sport psychology into management research. Whereas 7% of references to team articles in sport psychology come from management journals, only 0.6% of team references in management journals come from sport psychology. Despite this, longitudinal analysis indicates that in the last 10 years the rate of integration between these fields is increasing. We identify specific topics that have accounted for this integration and suggest topics ripe for future integration.