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Daniel M. Landers

From 1950 to 1980, the field of sport psychology made significant strides. The developments were so rapid and so profound that this period can be called the “formative” years of the field. There was a tremendous expansion of the sport psychology literature, some of which constituted sustained contributions on a single research topic. Several textbooks and specialty books were published during this time period. Sport psychology journal articles expanded so much that journals devoted entirely to sport psychology research were created. The first graduate programs and research societies that focused more directly on sport psychology were also established. Applied sport psychology techniques, such as relaxation, imagery, and concentration training, were developed and made available to athletes. In addition to providing a description of the above-mentioned developments, some insights into dominant research methodology trends will be presented for the time periods of 1950 to 1965 and from 1966 to 1980.

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Daniel M. Landers

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Daniel M. Landers

It is maintained that a balance among theory testing, applied research, and dissemination, though an ideal goal for sport psychology, is not being achieved because theory testing has not kept pace. To explain the rise and decline of theory testing in sport psychology a historical perspective was used. Whereas sport psychology from 1950-1965 was characterized by empiricism, from 1966-1976 it was characterized by a social analysis approach used to test single theories with novel tasks in a laboratory setting. In contrast to the earlier approaches, it is recommended that contemporary sport psychologists (a) use more meta-analyses to recheck the conclusions of past reviews, (b) become less reliant on a single research method or setting, (c) avoid premature commitments to a theory, and (d) become less enamored with statistically based null hypothesis testing. A number of suggestions are offered and examples provided to encourage, where appropriate, the use of “strong inference,” a more eclectic employment of research methods and settings as well as statistical techniques to determine the strength of observed relationships.

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Karen J. Tropp and Daniel M. Landers

This study quantified the interaction channels used by intercollegiate field hockey teams and compared these to Bavelas' centrality index and the emergence of leadership/interpersonal attraction. Interaction frequencies, defined as passes to teammates, were determined for each playing position for three teams (N = 37) using 4-3-2-1-1, 5-3-2-1, and 4-2-3-1-1 structural systems. Members of four teams for each system (N = 177) then rated each teammate on leadership and attraction. Analyses of variance showed leadership and attraction differences among low, moderate, and high interactors (p < .05), but these differences disappeared when goalies were eliminated from the analysis. Thus, high-interaction frequencies were not indicative of high leadership and attraction ratings. Only “leadership,” “years on the varsity,” and “attraction” were found to discriminate between captain and noncaptains. The results suggest that for highly dynamic tasks functional centrality and task independency are perhaps more important factors than spatial centrality and high interaction.

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Karla A. Kubitz and Daniel M. Landers

This study examined the effects of an 8-week aerobic training program on cardiovascular responses to mental stress. Dependent variables included electrocardiographic activity, blood pressure, electroencephalographic (EEG) activity, state anxiety, and state anger. Quantification of indicators of sympathetic, parasympathetic, and central nervous system activity (i.e., respiratory sinus arrhythmia, T-wave amplitude, and EEG activity, respectively) allowed examination of possible underlying mechanisms. Subjects (n = 24) were randomly assigned to experimental (training) and control (no training) conditions. Pre- and posttesting examined cardiorespiratory fitness and responses to mental stress (i.e., Stroop and mental arithmetic tasks). MANOVAs identified a significant effect on cardiorespiratory fitness, heart rate, respiratory sinus arrhythmia, and EEG alpha laterality. The results appear consistent with the hypothesis that enhanced parasympathetic nervous system activity and decreased central nervous system laterality serve as mechanisms underlying certain aerobic training effects.

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Jennifer L. Etnier and Daniel M. Landers

The primary purpose of this study was to examine differences in performance on fluid and crystallized intelligence tasks as a function of age and fitness. A secondary purpose was to examine the influence of age and fitness on the beneficial effects that practice has on both performance and retention on these tasks. Fitness was assessed in 41 older and 42 younger participants who were then randomly assigned to either experimental or control conditions. Participants performed repeated trials on two cognitive tasks during acquisition and retention, with the experimental group practicing for 100 trials and the control group practicing for 20 trials. Older participants performed better than younger participants on the crystallized intelligence task: however, younger participants performed better than older participants on the fluid intelligence task. On the fluid intelligence task, older fit participants performed better than older unfit participants. Learning did occur on the fluid task and differed as a function of age and fitness. Learning did not occur on the crystallized task.

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Lynette L. Craft and Daniel M. Landers

The effect of exercise on negative affect has been examined in hundreds of studies. However, the effect of exercise on diagnosed clinical depression has received far less attention. Furthermore, poor methodological techniques predominate and results have been conflicting. A meta-analysis was conducted to investigate the effect of exercise on clinical depression and depression resulting from mental illness. The chosen studies examined the effect of a chronic exercise paradigm (independent variable) on depression (dependent variable). Each study’s variables were coded: design, subjects, exercise, and dependent measure characteristics that could moderate the effect of exercise on depression. Moderator variables were analyzed using analysis of variance (ANOVA). Results from 30 studies showed an overall mean effect of −.72. Therefore, individuals who exercised were −.72 of a standard deviation less depressed than individuals who did not exercise. Moderating variables and implications for the prescription of exercise as an effective treatment for depression are discussed.

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Frederick S. Daniels and Daniel M. Landers

This study investigated heart rate (HE) and respiration functioning during rifle shooting to test hypotheses derived from Schwartz's (1979) systems and disregulation theory, and to compare biofeedback with verbal instruction in developing awareness and control of autonomic patterns. Male subjects (N = 8) were pretested to determine HE and respiration patterns affecting performance. They were then divided into two equal groups and given either auditory biofeedback or verbal instruction. The auditory-biofeedback group received continuous pattern feedback through earphones while the verbal instruction group received only presession instruction without feedback. Each group trained for five sessions of 40 shots each. Following training, two 40-shot sessions were conducted. A scaled interview was administered pre- and posttraining to determine awareness/control of autonomic functioning. Compared to the verbal instruction group, the results showed that the biofeedback group significantly improved performance and consistency of the desired pattern and had significantly greater awareness/control of the autonomic pattern. The results supported the systems and disregulation theory as well as the viability of biofeedback for altering imbalances within the systems.

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Deborah L. Feltz and Daniel M. Landers

A longstanding research question in the sport psychology literature has been whether a given amount of mental practice prior to performing a motor skill will enhance one's subsequent performance. The research literature, however, has not provided any clear-cut answers to this question and this has prompted the present, more comprehensive review of existing research using the meta-analytic strategy proposed by Glass (1977). From the 60 studies yielding 146 effect sizes the overall average effect size was .48, which suggests, as did Richardson (1967a), that mentally practicing a motor skill influences performance somewhat better than no practice at all. Effect sizes were also compared on a number of variables thought to moderate the effects of mental practice. Results from these comparisons indicated that studies employing cognitive tasks had larger average effect sizes than motor or strength tasks and that published studies had larger average effect sizes than unpublished studies. These findings are discussed in relation to several existing explanations for mental practice and four theoretical propositions are advanced.