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Different individuals learn different solutions to the same perceptual-motor task regardless of the fact that they may undergo the same practice conditions. In the current study, we characterized individual solutions to a perceptual-motor task. Eighteen self-declared right-handed participants were requested to intercept a moving target controlling a virtual ball using a computer mouse. Target speed varied across trials. Participants visited the lab 2 days in a row. They practiced 250 trials on Day 1 and 50 trials on Day 2. We assessed participants’ preferred speed and maximum speed on both days. We combined a qualitative description of solutions on the task space and the quantitative growth curve analysis to address individual differences. Results indicated an overall trend to increase the ball release speed to handle the task constraints. Moreover, the local shape of the solution manifold constrained individuals’ solutions. Contrary to our expectations, neither individual preferred speed nor individual maximum speed improved model fit.

Although researchers have highlighted the benefits of adopting an external focus of attention for rehabilitation, studies have consistently revealed low external focus use by physiotherapists. Consequently, the purpose of this research was to explore factors influencing physiotherapists’ focus of attention use and to gain insight into the barriers, and potential solutions, related to effective external focus use. Eight physiotherapists, working with musculoskeletal rehabilitation clients, first completed the Therapists’ Perceptions of Motor Learning Principles Questionnaire and then participated in virtual one-on-one interviews. The interviews followed a semistructured interview guide and were analyzed using a total quality framework approach to qualitative content analysis. Data showed that physiotherapists’ focus of attention use was influenced by physiotherapist, client, and task characteristics/experiences, as well as focus of attention statement provision strategies. Furthermore, the main barriers discussed related to educational experiences, reinforcement of internal focus of attention statement use and aspects related to research. Solutions presented to these barriers included the incorporation of focus of attention content into both the Canadian physiotherapy curriculum and continued education. Overall, these results advance our knowledge of factors underlying physiotherapists’ focus of attention use and barriers that must be overcome to successfully translate the focus of attention research into physiotherapy.

Although researchers have consistently demonstrated the potential benefit of an external focus of attention for rehabilitation, research has shown that this finding has yet to be translated into Canadian physiotherapy. Further, specific barriers to external focus use have been reported by Canadian physiotherapists, and as a solution toward increasing physiotherapists’ use of external focus, these same physiotherapists recommended the development of an educational workshop on focus of attention. Considering this, described herein is the process of developing such a workshop, which involved (a) gathering input from physiotherapists concerning content and format via one-on-one interviews and (b) engaging in discussion about content with focus of attention researchers. Analysis of the interview data featured key content for the workshop, the types of activities to include, and a recommended sequencing for the activities: specifically, sharing didactic information on focus of attention research, then providing instruction and demonstration of external focus use, and finally, finishing with opportunities for generating and delivering external focus statements. This input, along with that of the researchers, led to the development of a two-component focus of attention workshop, which includes an asynchronous component, featuring seven self-directed learning modules and a synchronous component, which consists of a virtual group session.

Recent metascience suggests that motor behavior research may be underpowered, on average. Researchers can perform a priori power analyses to ensure adequately powered studies. However, there are common pitfalls that can result in underestimating the required sample size for a given design and effect size of interest. Critical evaluation of power analyses requires successful analysis reproduction, which is conditional on the reporting of sufficient information. Here, we attempted to reproduce every power analysis reported in articles (k = 84/635) in three motor behavior journals between January 2019 and June 2021. We reproduced 7% of analyses using the reported information, which increased to 43% when we assumed plausible values for missing parameters. Among studies that reported sufficient information to evaluate, 63% reported using the same statistical test in the power analysis as in the study itself, and in 77%, the test addressed at least one of the identified hypotheses. Overall, power analyses were not commonly reported with sufficient information to ensure reproducibility. A nontrivial number of power analyses were also affected by common pitfalls. There is substantial opportunity to address the issue of underpowered research in motor behavior by increasing adoption of power analyses and ensuring reproducible reporting practices.

Background: Previous research suggests that children with or at risk of probable developmental coordination disorder (pDCD) activate different areas of the brain when performing certain motor skills compared with typically developing (TD) children. This study used functional near-infrared spectroscopy to compare prefrontal cortex (PFC) activity in TD and pDCD during the completion of manual (three-dimensional [3D]) and computerized versions (two-dimensional) of the Tower of Hanoi (ToH) puzzle. Method: A total of 12 children (TD and pDCD; one female/11 male, $\overline{\mathrm{x}}=10.36$ , SD ± 1.52 years) performed the two-dimensional and 3D conditions of the ToH disk tasks, with equivalent executive function but different motor requirements, with functional near-infrared spectroscopy to compare PFC activity. Results: Interestingly, brain oxygenation levels were more apparent in the 3D versus two-dimensional ToH. In the 3D, there were large differences between pairs of discordant sibling sets and this was located to the right medial PFC, with pDCD exhibiting less activation in this region. Conclusion: While only exploratory, we have identified potential differences in the right medial PFC region, which differs within sibling sets with different pDCD status. These results concur with previous studies and are an area that needs to be explored further with a larger cohort of TD and pDCD.

Motor competence as an indicator of gross motor development is characterized by changes in movement patterns and outcomes. The Test of Gross Motor Development-3 consists of six locomotor and seven ball tasks used to assess the quality of fundamental motor skills in children. The purpose of this study is twofold—to produce a Slovenian translation of Test of Gross Motor Development-3 and to evaluate it on a sample of Slovenian children. First, a back translation was carried out with the help of relevant field professionals, thus producing a Slovenian version of Test of Gross Motor Development-3 with excellent content validity. Second, trained assessors rated the video-recorded test tasks of 452 Slovenian children with smaller groups of measured participants repeating the procedure within 2- and 4-week interval to assess reliability. Finally, the collected data were analyzed using several statistical methods. The data showed good to excellent reliability for intrarater, interrater, test–retest reliability, structural validity, and internal consistency for the majority of motor skills, as well as good measurement invariance across genders.

Research has shown that nonright-handedness in children with developmental coordination disorder (DCD) is associated with poorer motor and cognitive performance. This study investigated the influence of degree and direction of handedness on performance using the Home Handedness Questionnaire, the Hit-the-Dot test, the Movement Assessment Battery for Children, and the digital Trail-Making Test. Eighteen children with DCD and 21 typically developing children aged 8–12 years participated in this study. The distribution of degree and direction of handedness in the group of DCD children were not different from that found in the typically developing group. In the Hit-the-Dot test, typically developing children significantly performed better than children with DCD, no matter which hand was dominant or to which degree. A significant inconsistent-handed advantage in the subdomain balance was found for children with DCD. Inconsistent handedness also seems to be an advantage for children with DCD on the digital Trail-Making Test performance. The relationship between the subcategories of the Movement Assessment Battery for Children and the digital Trail-Making Test part B is stronger for consistent than for inconsistent handedness. Our findings suggest that children with DCD and inconsistent handedness might benefit from greater crosstalk across hemispheres. In addition, these predispositions can be reinforced or discouraged throughout development and via occupational therapy.

Purpose: To examine the factor structure and measurement invariance of the Körperkoordinations Test Für Kinder (KTK) and covariates of motor competence in a sample of Iranian children aged 5–14 years. Methods: Participants were children aged 5–14 years (N = 432, 61% boys). Age, sex, and body mass index were collected. Confirmatory factor analysis (CFA) was conducted to investigate the factorial structure of KTK and multigroup CFA carried out to test measurement invariance across sexes and age groups. In addition, we calculated a model with covariates to identify the association between KTK items with age, sex, and body mass index z score. Results: CFA supported the construct validity of a one-factor model with an appropriate fit indices that the four subtests loaded on the same factor namely motor competence. Furthermore, according to the magnitude of changes in root mean square error of approximation and comparative fit index between nested models, the assumption of KTK measurement invariance across age-groups and sex were valid. Finally, adequate fit indices were found for the multigroup CFA path model of KTK with the covariates sex, age, and body mass index z score. Conclusion: The KTK is a valid, reliable, and valuable instrument for assessing motor competence of Iranian children and adolescents.