A reflection on motor learning theory in pediatric occupational therapy practice Jill G. Zwicker I Susan R. Harris Key words I Motor learning I Theory, Pediatric practice I Occupational therapy Mots clés I Apprentissage moteur I Théorie I I Pratique pédiatrique Ergothérapie Abstract Background. Theory provides a guide to clinical practice. To date, the most prevalent theories in pediatric occupational therapy practice are sensory integration and neurodevelopmental treatment. Purpose. The purpose of this paper is to present a brief overview and reflection on motor learning theories as well as a summary of motor learning principles that can be used in pediatric practice. Key Issues. Over the past two decades, motor learning theory has been applied in adult occupational therapy practice, but it has been slow to gain popularity in pediatrics. Implications. Although therapists may be tacitly applying motor learning principles in practice, conscious and deliberate application of these principles to a variety of pediatric populations is required to determine if motor learning theory provides a viable and effective contribution to evidence-based, occupational therapy pediatric practice. Further research comparing motor learning interventions to other dominant interventions in pediatric occupational therapy is warranted. Résumé Description. La théorie est un guide pour la pratique clinique. À ce jour, les théories les plus répandues concernant la pratique de l’ergothérapie en pédiatrie sont celles de l’intégration sensorielle et de l’approche du développement neurologique. But. Cet article présente un bref aperçu des théories de l’apprentissage moteur et propose une réflexion sur ces théories, tout en résumant les principes pouvant être appliqués en pratique pédiatrique. Questions clés. Depuis les vingt dernières années, les principes de la théorie de l’apprentissage moteur sont appliqués dans la pratique de l’ergothérapie auprès des adultes, alors que ces mêmes principes tardent à se répandre en pédiatrie. Conséquences. Bien qu’en pratique les ergothérapeutes appliquent tacitement les principes de l’apprentissage moteur, il serait nécessaire d’appliquer consciemment et délibérément ces principes auprès de différentes clientèles en pédiatrie, afin de déterminer si la théorie de l’apprentissage moteur contribue fondamentalement et efficacement à la pratique de l’ergothérapie en pédiatrie fondée sur les faits scientifiques. Il serait justifié de pousser plus loin les recherches en comparant des méthodes d’intervention basées sur les principes d’apprentissage moteur à d’autres méthodes fréquemment utilisées en ergothérapie dans le domaine de la pédiatrie. heory is the driving force behind occupational therapy practice. Using the Canadian Practice Process Framework (Townsend & Polatajko, 2007), therapists select frames of reference to guide their practice. In pediatric occupational therapy practice, the dominant theoretical approaches used in the United States, Canada, Australia, and the United Kingdom are sensory integration (SI) theory and neurodevelopmental treatment (NDT) (Brown, Rodger, Brown, & Roever, 2005; Howard, 2002; Storch & Eskow, 1996). These theoretical approaches were developed in the 1960s and 1940s respectively and are based on a hierarchical model of the central nervous system (CNS). Since the late 1980s, the CNS has been conceptualized as multilevel and multi-system rather than hierarchical (Shepard, 1991). This shift in thinking about the CNS led to the development of contemporary theories of motor learning. While motor learning theory has been widely used in adult occupational therapy practice, it has been slow to gain popularity in pediatrics. The purpose of this paper is to review the key principles of motor learning theories and their application to pediatric occupational therapy practice. Chinn and Kramer’s (1995) framework will be used to reflect on the clarity, simplicity, generality, accessibility, and importance of motor learning theories as a foundation for pediatric practice. We will then provide an example of how motor learning theories can be T © CAOT PUBLICATIONS ACE VOLUME 76 I NUMBER 1 I CANADIAN JOURNAL OF OCCUPATIONAL THERAPY I FEBRUARY 2009 29 ZWICKER & HARRIS applied to pediatric practice and will conclude with future directions for research and practice. Motor learning theories Motor learning is defined as “a set of processes associated with practice or experience leading to relatively permanent changes in the capability for movement” (Schmidt & Lee, 2005, p. 302). Motor learning has been a key concept in the fields of physical education and sport since the 1970s. Motor learning theory entered the field of neurological rehabilitation during the 1980s and has been applied primarily to adults with stroke (Carr & Shepherd, 1989; Gilmore & Spaulding, 2001; Krakauer, 2006; Sabari, 1991). In recent years, motor learning has formed the foundation for treating children with developmental coordination disorder (DCD)(Missiuna, Mandich, Polatajko, & Malloy-Miller, 2001; Niemeijer, Smits-Engelman, & Schoemaker, 2007; Sugden & Henderson, 2007). No one theory of motor learning has been able to explain motor skill acquisition in its entirety, but each theory has offered an important contribution to our understanding of how motor skills are learned. Three motor learning theories that have dominated the literature will be highlighted, and then the key principles of motor learning that have evolved from these theories will be summarized. Closed-loop theory Adams (1971) was the first researcher to describe a theory of motor learning. The primary aspect of his theory was the concept of a closed-loop process of acquiring skills. Briefly, Adams posited that sensory feedback is required for learning motor skills. He proposed that movement was selected and initiated by a memory trace, which was modified by a perceptual trace with repeated practice. This perceptual trace is the internal reference within which to compare movement and detect error. Adams’ theory assumes that motor learning is enhanced by repeated practice of the same movement, with guidance if necessary, to minimize error. Adams’ (1971) theory has been refuted with two main lines of research. First, studies with animals (Fentress, 1973; Taub, 1976) and humans (Rothwell et al., 1982) have demonstrated that motor learning is possible without sensory feedback. Secondly, Adams’ contention that practice needs to be errorless has not been borne out by research; studies have indicated that variability in practice may be superior in promoting motor learning (Shea & Kohl, 1990, 1991). Schema theory To address the weakness inherent in Adams’ (1971) theory, Schmidt (1975) proposed an open-loop process for motor learning known as schema theory. Briefly, Schmidt suggested that generalized motor programs (GMP) are created from past movement patterns; these GMP are recalled from memory 30 FÉVRIER 2009 I REVUE CANADIENNE D’ERGOTHÉRAPIE I NUMÉRO 1 I and influence motor performance of new tasks. A recall schema initiates the GMP that closely resembles the desired movement, and the recognition schema evaluates the occurring movement. The recall schema is then modified by the movement experience. A major limitation of schema theory is that it does not explain how GMP are initially formed. Schmidt’s theory has evolved over time (Schmidt, 2003) and has provided important motor learning concepts of knowledge of results and variability of practice, discussed below. Dynamic systems theory Dynamic systems theory is considered a contemporary theory of motor learning despite its appearance prior to the previous two motor learning theories (Bernstein, 1967). Bernstein’s work resurfaced in the 1980s with the rejection of the hierarchical view of the CNS. Dynamic systems theory places less emphasis on the nervous system by viewing movement as emerging from the interaction of three general systems: the person, the task, and the environment (Kamm, Thelen, & Jensen, 1990; Mathiowetz & Haughen, 1995; Newell, 1986). Each general system has several subsystems that interact with one another to either support or constrain movement. Subsystems that have the potential to change are referred to as control parameters and may be the target of therapeutic intervention to improve motor learning. Practice and experience alter the formation of movement patterns through interaction with the environment and the demands of the task. Attractor states are efficient patterns of movement that develop with practice and experience for common tasks (Kugler & Turvey, 1987; Mathiowetz & Haughen). Motor learning principles Several principles of motor learning have evolved from the above theories and have been applied in normal and clinical populations. These principles include stages of learning, types of tasks, practice, and feedback. Stages of learning Fitts and Posner (1967) described three stages of motor learning: cognitive, associative, and autonomous. During the cognitive stage, an individual may have a general idea of the movement required for a task but might not be sure how to execute that movement. Performance during this stage is likely to be highly variable with a large number of errors. Improved performance is contingent upon the individual’s conscious effort to attend to the task requirements. Often this is achieved through verbalization of movement strategies, which Adams (1971) referred to as the verbal motor stage in his closed-loop theory of motor learning. The second, intermediate stage, of motor learning is the associative stage. Skills become more refined with practice, resulting in greater consistency of performance and fewer VOLUME 76 © CAOT PUBLICATIONS ACE ZWICKER & HARRIS random practice, which involves varying the task demands over practice trials (Lee, Swanson, & Hall, 1991). The effects of blocked versus random practice for children is less clear; some studies have found no difference between these practice schedules for children (Pollock & Lee, 1997; Wegman, 1999), whereas others have found similar results as in adults, with random practice facilitating greater motor learning (Granda Vera & Montilla, 2003; Ste-Marie, Clark, Findlay, & Latimer, 2004). Evidence suggests that the different results may be related to the complexity of the task and the age of the child (Jarus & Goverover, 1999; Jarus & Gutman, 2001). A final aspect of practice is whether to practice tasks as whole tasks or in parts. While learning parts of a task may be helpful during early stages of learning, this approach does not facilitate learning the skill in the context in which it will be used (Peck & Detweiler, 2000). Research has shown that part versus whole training results in different kinematic profiles, with better movement quality obtained in whole-task practice conditions (Ma & Trombly, 2001). errors. The therapist provides less guidance during this stage and allows the individual to make errors so that he or she can learn to adjust subsequent movements independently (Poole, 1991). Learning from errors is thought to promote generalization to similar motor tasks. Automaticity of motor learning occurs in the third stage, autonomous stage. At this stage, the motor skill has been the learned and little cognitive effort is required to execute it. Automaticity is evident when a motor skill can be performed while engaging in another task, such as walking and talking or playing the piano and singing. Evidence from neuroscience indicates that less brain activation is required when automaticity of movement has been achieved (Poldrack et al., 2005; Wu, Kansaku, & Hallett, 2004), suggesting that fewer attentional demands are required. Types of tasks Motor learning is contingent upon the type of task to be learned. Schmidt and Lee (2005) classified several types of tasks that can affect how the skill is learned. Discrete tasks have a recognizable beginning and end (e.g., throwing a ball). Continuous tasks, on the other hand, do not have an inherent start and finish as part of the task (e.g., walking); continuous tasks have an arbitrary beginning and end, depending upon the individual. Serial tasks are a collection of discrete tasks that are strung together (e.g., dressing). Tasks can also be classified as open versus closed, depending upon predictability in the environment. Open tasks are in an environment that is constantly changing. The individual cannot plan an entire movement in advance but must rapidly adapt the plan in response to a changing environment (e.g., playing hockey). Closed tasks are in a stable environment, which offers predictability to the movement pattern (e.g., bowling). Feedback Intrinsic feedback is information provided by the sensory systems as a result of movement (Shumway-Cook & Woollacott, 2001) and is consistent with Gentile’s (1998) notion of implicit learning. Implicit learning is not under conscious control, but the therapist can facilitate it by structuring the task and environment to support effective movement patterns (Gentile). Extrinsic feedback supplements intrinsic feedback and forms the basis for explicit learning (Gentile; Shumway-Cook & Woollacott. 2001), which is learning that results from clearly stated directions or instructions (Taber’s Online, 2000-2008). Verbal feedback and demonstration are examples of how a therapist can promote explicit learning. Feedback can be given during the movement (concurrent), right after the movement (immediate), at the completion of movement (terminal), or after a delay (Schmidt & Lee, 2005). Feedback can also be given consistently (i.e., after every trial) or sporadically (i.e., after some but not all trials). Contrary to what one might expect, sporadic feedback after a delay is superior for motor learning to consistent feedback given immediately after the movement (Schmidt, 1991; Winstein & Schmidt, 1990). The delay in feedback given over some trials allows the individual to determine what factors are influencing performance and prevents reliance on external feedback to learn the skill. While sporadic feedback is superior for adult motor learning, recent evidence suggests that children respond differently; children with 100% feedback during motor skill acquisition performed significantly better on delayed retention than children on a reduced feedback schedule (Sullivan, Kantak, & Burtner, 2008). Two other points related to feedback in motor learning are knowledge of results (Salmoni, Schmidt, & Walter, 1984) Practice One of the most significant tenets of motor learning is practice. Practice schedules, such as massed versus distributed practice and blocked versus random practice, have been studied extensively in motor learning literature. Massed practice involves continuously practicing a task with little or no rest; distributed practice entails practicing a task alternating with periods of rest. The latter is generally superior to massed practice in contributing to motor learning (Donovan & Radosevich, 1999). One notable exception was a small study of children with autism in which no significant differences were found between massed and distributed practice schedules on motor performance and learning (Wek & Husak, 1989). Blocked practice involves repetitive practice on the same task. While this type of practice results in improved motor performance in a short period of time, it does not necessarily promote relatively permanent motor learning (Magill & Hall, 1990). Greater retention and transfer are accomplished with © CAOT PUBLICATIONS ACE VOLUME 76 I NUMBER 1 I CANADIAN JOURNAL OF OCCUPATIONAL THERAPY I FEBRUARY 2009 31 ZWICKER & HARRIS and knowledge of performance (Gentile, 1972). Knowledge of results is terminal feedback given verbally about the outcome of movement in terms of the goal. In contrast, knowledge of performance is feedback on the specific components of the movement pattern, not on the achievement of the goal. Reflection on motor learning theories Thus far, a brief overview of the major motor learning theories and the main principles of motor learning have been presented. We will now apply a framework proposed by Chinn and Kramer (1995) for critically evaluating motor learning theories in order to reflect on how they might be applicable in pediatric occupational therapy practice. Motor learning theory will be evaluated on five criteria: clarity, simplicity, generality, accessibility, and importance. Clarity Clarity refers to “how well a theory can be understood and how consistently the ideas are conceptualized” (Chinn & Kramer, 1995, p. 127). From the perspective of a clinician, “motor learning theory” is not particularly clear; this review highlights three motor learning theories that are contradictory in many respects. Motor learning is not one theory but rather several interpretations and concepts related to how motor skills are acquired. In rehabilitation literature, the term “motor learning” appears to refer to a theoretical approach, with little reference to a specified theory. The use of this catch-all term adds to the confusion about what motor learning theory is and how it can be applied in practice. At best, we seem to apply motor learning principles with little regard for the theory from which they evolved. Without a clear understanding of the theoretical basis of motor learning, we cannot adequately apply the theory, test it empirically, or determine its usefulness in clinical practice. Simplicity Each of the motor learning theories presented are naturally complex because they aim to explain and predict how complex motor skills are learned. Application of motor learning principles is seemingly straightforward, but there are many factors to consider in designing an intervention program: practice schedule, amount of practice, type of task, stage of the learner, amount and type of feedback, environmental influences, and the like. The multiple factors that need to be taken into account may hinder therapists in consistently applying motor learning theory to practice. Generality Motor learning concepts have broad applicability across the lifespan in both typical (Brydges, Carnahan, Backstein, & Durowski, 2007; Ma, Trombly, & Robinson-Podolski, 1999) and clinical populations (Jarus, 1994; Poole, 1991; Sabari, 1991; Valvano, 2004). Motor learning theories have been 32 FÉVRIER 2009 I REVUE CANADIENNE D’ERGOTHÉRAPIE I NUMÉRO 1 I applied in the field of adult rehabilitation for the last two decades (Jarus & Ratzon, 2005, Sietsema, Nelson, Mulder, Mervau-Scheidel, & White, 1993; Stanton et al., 1983) but only in recent years with children. Most motor learning research with children has focused on DCD, including the Cognitive Orientation to daily Occupational Performance (CO-OP) approach (Missiuna et al., 2001), Neuromotor Task Training (Niemeijer, Schoemaker, & Smits-Engelman, 2006; Niemeijer, Smits-Engelman, Reynders, & Schoemaker, 2003; Niemeijer et al., 2007), task-specific intervention (Revie & Larkin, 1993), and ecological intervention (Sugden & Henderson, 2007). Children with cerebral palsy have also benefited from therapy based on motor learning (Eliasson, 2005; Ketelaar, Vermeer, Haart, van Petegem-van Beek, & Helders, 2001; Thorpe & Valvano, 2002). Principles of motor learning have applicability to a much broader range of children with disabilities, but this is largely undiscovered. Accessibility Given the voluminous literature on motor learning, empirical accessibility is a strength of motor learning theories. Concepts and relationships have been tested for several decades by different disciplines, resulting in refinements to motor learning theory or development of new theories. The bulk of research has focused on schema theory, but dynamic systems theory is gaining popularity (see Shumway-Cook & Woollacott, 2007; Schmidt & Lee, 2005 for overviews). Yet, despite the application of motor learning theories for decades, a limited number of studies has been conducted in pediatric rehabilitation (Eliasson, 2005; Missiuna et al., 2001; Niemeijer et al., 2003; Niemeijer et al., 2006; Niemeijer et al., 2007; Thorpe & Valvano, 2002). Deliberate application of the theory is another form of accessibility, which also has been lacking in pediatric occupational therapy practice. We may be tacitly using motor learning principles in our practice, but we are not necessarily documenting our theoretical framework or reflecting motor learning in our clinical reasoning. Importance Motor learning theories are highly compatible with models of occupational therapy practice (Townsend & Polatajko, 2007; Strong et al., 1999). In pediatric practice in particular, a child’s acquisition of motor skills is important to his or her functioning in self-care activities, participating in school, and engaging in play. Motor learning has great clinical significance to pediatric occupational therapists, yet it is underutilized. In a survey of Canadian and Australian pediatric occupational therapists, only 30.5% and 33.0% respectively used motor learning theory in their treatment of children with neurological conditions (Brown et al., 2005). In Australia, 20.4% of surveyed occupational therapists used motor learning theory for children with learning disabilities, but Canadian occupational therapists did not even identify VOLUME 76 © CAOT PUBLICATIONS ACE ZWICKER & HARRIS using motor learning theory for this population. The importance of motor learning theory in pediatric practice cannot be underestimated. Treatments based on motor learning theory have shown more promising results compared to SI for children with DCD (Polatajko & Cantin, 2005) and NDT for children with cerebral palsy (Butler & Darrah, 2001). In summary, reflection on motor learning theory using Chinn and Kramer’s (1995) framework has demonstrated that motor learning theory has generality and importance but may be lacking in clarity and simplicity for application to pediatric occupational therapy. Accessibility may be improved by deliberately applying motor learning theory to practice and reflecting use of motor learning principles in our clinical reasoning. To that end, we will now share an example of how motor learning could be applied to a child with a disorder other than DCD or cerebral palsy. therapist. Alan had left-sided spastic hemiplegia as a result of his ABI but was fortunately right-handed; he required the use of a powered wheelchair for community-based activities. Both Alan and his parents were concerned that he seldom played with classmates or friends due, in part, to his limited motor skills. Together with the school occupational therapist, they identified the functional goal of increasing Alan’s playtime with age-mates in his neighborhood. Selection of a meaningful goal represents the first component of goaldirected training (Mastos et al., 2007). Alan’s specific goal was to learn how to bowl so that he could go bowling with a group of neighborhood friends. The second component of goal-directed training is to assess baseline performance (Mastos et al., 2007). To assess baseline performance, the school occupational therapist analyzed Alan’s functional abilities with his right upper extremity (person), while sitting in his wheelchair in the bowling alley (environment), and performing the desired occupation (bowling). Because Alan had no difficulty grasping the bowling ball by inserting his fingers into the three holes but did have trouble releasing it, as part of the baseline assessment the therapist performed a task analysis (Mastos et al.) of the motor skills required to release the ball. The therapist also determined that there were no specific environmental constraints caused by Alan’s wheelchair or with accessibility to the bowling alleys and lanes so she decided to develop a motor-learning-based intervention program to assist Alan with developing the ability to release the bowling ball in order to propel it down the lane. To accomplish this, Alan’s therapist developed the following initial therapy objective for Alan based on his therapy goal: “While sitting in his wheelchair in a specified ‘practice lane’ at the local bowling alley, Alan will release the bowling ball onto the lane independently four out of five times within an eight-minute period with physical assistance and verbal cueing from his occupational therapist.” The intervention (third component of goal-directed training) was based on Fitts and Posner’s (1967) three stages of motor learning. In the first, or cognitive stage, the therapist first asked Alan to try to problem solve, or think through the skills needed to release the bowling ball. She then provided both physical cueing and verbal instructions to facilitate Alan’s release of the ball (Mastos et al., 2007). In the second, or associative stage, Alan practiced releasing the ball on the bowling alley without the added physical assistance from the therapist but with continued verbal cueing. He was allowed to make errors and to learn from those errors as he repeatedly (practice) attempted to release the ball onto the alley. During the third stage of learning, the autonomous stage, Alan was able to consistently release the ball onto the alley without the need for verbal cueing from the therapist. The fourth and final component of goal-directed training is to evaluate the outcome of the therapy goal. The Application of motor learning theory to pediatric occupational therapy practice Because dynamic systems theory is the most recent iteration of motor learning, we will develop an example of its application to pediatric occupational therapy practice. We will also illustrate the three-stage model of motor learning as described by Fitts and Posner (1967). A recent set of case reports involving two adults with acquired brain injury (ABI) (Mastos, Miller, Eliasson, & Imms, 2007), in which dynamic systems theory was used as the basis for goal-directed training, will be highlighted to develop an analogous example for a child with ABI. In attempting to clarify and conceptualize (i.e., bring clarity to) dynamic systems theory, Mastos and colleagues stated that the underlying principles of the goal-directed training approach stem from dynamic systems theory, “which suggest[s] that movement patterns emerge as a result of the interaction between the person’s abilities, the environment and the goal” (p. 47). They defined goaldirected training simply as “an activity-based approach to intervention” (p. 47). In an attempt to simplify the dynamic systems theory, the authors (occupational therapists and physical therapists) used principles of motor learning to guide their intervention approach, that is, they used goaldirected training. Because of similarities in the sequelae from ABI in adults and children, we will generalize Mastos et al.’s goal-directed training approach to an example of a child with ABI, thus translating dynamic systems theory into pediatric practice and making this theory more accessible and more important to pediatric clinicians. In our case example, Alan is a 10-year-old boy who had an acquired (traumatic) brain injury from a motor vehicle accident 4 years previously. He had a medical diagnosis of moderate ABI, was living at home, and received school-based consultation from an occupational therapist and a physical © CAOT PUBLICATIONS ACE VOLUME 76 I NUMBER 1 I CANADIAN JOURNAL OF OCCUPATIONAL THERAPY I FEBRUARY 2009 33 ZWICKER & HARRIS outcome of the initial specific therapy objective can be evaluated independently by the therapist (Randall & McEwen, 2000) or could be broadened into five discrete steps representing different levels of success using goal attainment scaling (Ottenbacher & Cusick, 1993), as described by Mastos and colleagues (2007). Discussion Implications for practice The purpose of this paper was to provide a brief overview of motor learning theories and highlight motor learning principles that might be applied to pediatric practice. Based on this review, it was suggested that motor learning theory is neither clear nor simple, but it has great potential for pediatric occupational therapy practice. Motor learning is widely applicable to the populations served by pediatric therapists, but empirical studies have not yet determined for whom it is beneficial. Preliminary evidence suggests that children with cerebral palsy and those with DCD have made functional gains with interventions based on motor learning. Given the propensity for neuroplastic change in the nervous system, children with other neurological disorders, developmental delay, autism, and learning disabilities may also benefit from this approach to improve motor skills and functional performance. Many authors have previously advocated for the use of motor learning theory in occupational therapy practice (Baker, 1999; Goodgold-Edwards, 1984; Jarus, 1994; Lesensky & Kaplan, 2000; Poole, 1991), yet it is still not widespread in pediatrics. This may be due, in part, to the lack of a practice model that translates these theoretical principles into a usable frame of reference for practice. The CO-OP approach is close to achieving this goal as it has taken many of the principles and incorporated them into a treatment approach for children with DCD (Polatajko et al., 2001). Sugden and Henderson (2007) have also outlined guidelines for using motor learning principles in interventions for children with motor impairment. Although a formal model for motor learning practice has yet to be developed for children with developmental disabilities, we are probably applying many motor learning principles tacitly in our practice. As clinicians, we need to be more conscious of and deliberate in our application of these principles to determine if they are effective and to further extend our understanding of motor learning theory. As a starting point, we can reflect the use of the theory in our clinical reasoning and documentation. For example, our documentation could describe our intervention in terms of blocked practice during the cognitive stage of learning so the child can understand the task. We might start practicing parts of the tasks at this early stage, but then move to practicing the whole skill in context. We might also describe the type of explicit feedback provided during the cognitive 34 FÉVRIER 2009 I REVUE CANADIENNE D’ERGOTHÉRAPIE I NUMÉRO 1 I phase and report on the child’s knowledge of results. During the associative stage, we could highlight variability of practice with a random practice schedule to facilitate motor learning. We could also indicate that greater emphasis is placed on implicit feedback at this stage so the child can attend to errors and make adjustments for subsequent movement (and rely less on explicit feedback). We could collect outcome data through our clinical records and publish our findings as case reports. These are critical first steps in determining the viability and effectiveness of motor learning principles in the various clinical populations of children with whom we work. Directions for future research The amount of practice required to learn motor skills is largely unknown. Preliminary evidence from the CO-OP approach suggests that 10 sessions may be sufficient to learn motor skills in the context of a task-specific intervention based on the child’s goals. Greater practice time is likely required for children with neuropathology, such as cerebral palsy or developmental delay. More research is needed to determine effective practice schedules for different types of tasks in a variety of pediatric populations. Using the four-step, goal-directed training process developed by Mastos and colleagues (2007), pediatric occupational therapists could replicate the adult case study examples by applying motor learning principles to children with ABI in their own practices. Similarly, there are published examples from the pediatric physical therapy literature in which motor learning principles have been applied in interventions for children with cerebral palsy (Ketelaar et al., 2001; Thorpe & Valvano, 2002) that could serve as useful models for occupational therapy intervention research. Finally, clinical trials comparing motor learning intervention to interventions based on current, dominant pediatric occupational therapy theory (e.g., sensory integration) would determine if a shift in pediatric practice is warranted. Conclusion Motor learning theories have a rich research history and broad applicability to normal and clinical populations. To date, they have been underutilized in pediatric occupational therapy practice, probably because of the current dominance of SI and NDT theories in practice and the lack of a cohesive practice model based on motor learning principles. With a concerted effort, principles from motor learning theory can be deliberately applied in practice to determine if motor learning theory offers a contribution to evidence-based pediatric occupational therapy practice. Acknowledgements Jill Zwicker has been awarded a Quality of Life Strategic Training Fellowship in Rehabilitation Research from the VOLUME 76 © CAOT PUBLICATIONS ACE ZWICKER & HARRIS Fitts, P. M., & Posner, M. I. (1967). Learning and skilled performance in human performance. Belmont, CA: Brooks/Cole. Gentile, A. M. (1972). A working model of skill acquisition with application to teaching. Quest, 17, 2-23. Gentile, A. M. (1998). Implicit and explicit processes during acquisition of functional skills. Scandinavian Journal of Occupational Therapy, 5, 7-16. Gilmore, P. E., & Spaulding, S. J. (2001). Motor control and motor learning: implications for treatment of individuals post stroke. Physical and Occupational Therapy in Pediatrics, 20, 1-15. Goodgold-Edwards, S. A. 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Physical and Occupational Therapy in Pediatrics, 24 (1-2), 79-107. Wegman, E. (1999). Contextual interference effects on the acquisition and retention of fundamental motor skills. Perceptual Motor Skills, 88, 182-187. Wek, S. R., & Husak, W. S. (1989). Distributed and massed practice effects on motor performance and learning of autistic children. Perceptual and Motor Skills, 68, 107-113. Winstein, C. J., & Schmidt, R. A. (1990). Reduced frequency of knowledge of results enhances motor skill learning. Journal of Experimental Psychology: Learning, Memory, and Cognition, 16, 677-691. Wu, T., Kansaku, K., & Hallett, M. (2004). How self-initiated memorized movements become automatic: A functional fMRI study. Journal of Neurophysiology, 91, 1690-1698. Authors Jill G. Zwicker, MA, OT (C) is PhD candidate, Rehabilitation Sciences, Faculty of Medicine, University of British Columbia, T325-2211 Wesbrook Mall, Vancouver, BC, Canada, V6T 2B5. Telephone: (604) 827-3369. E-mail: jzwicker@interchange.ubc.ca Susan R. Harris, PhD, PT, FCAHS, is Professor Emerita, Department of Physical Therapy, Faculty of Medicine, University of British Columbia, T212-2211 Wesbrook Mall, Vancouver, BC, Canada, V6T 1Z3. Telephone: (604) 822-7944. E-mail: shar@interchange.ubc.ca Copyright of articles published in the Canadian Journal of Occupational Therapy (CJOT) is held by the Canadian Association of Occupational Therapists.Permission must be obtained in writing from CAOT to photocopy,reprint,reproduce (in print or electronic format) any material published in CJOT.There is a per page,per table or figure charge for commercial use.When referencing this article,please use APA style,citing both the date retrieved from our web site and the URL.For more information,please contact:copyright@caot.ca. © CAOT PUBLICATIONS ACE VOLUME 76 I NUMBER 1 I CANADIAN JOURNAL OF OCCUPATIONAL THERAPY I FEBRUARY 2009 37