The myth of contextual interference learning benefit in sports practice: A systematic review and meta-analysis

The contextual interference (CI) model hypothesizes random practice (high CI) leads to inferior acquisition, but superior retention and transfer capabilities compared to blocked practice (low CI). These phenomena are well established in laboratory settings. However, the transfer to applied settings, particularly in sports practice is still under discussion. The aim of this systematic review and meta-analysis is to evaluate the possible generalisability of the CI phenomenon in sports-based contexts with regard to performance outcomes. Up to April 16th, 2022, five electronic databases (PubMed, Web of Science, Scopus, Taylor & Francis, and SciELO) were used to search for relevant studies investigating differences between blocked and random schedules at post-acquisition, retention, and/or transfer tests. Using the PICOS criteria, a total of 933 records were screened. Outcomes evaluating the acquisition, retention, and/or transfer performances in sports skills in healthy participants were included. The quality of the selected studies was scored using the PEDro scale. Thirty-seven studies were selected, of which twenty-seven were of good quality and the remaining ten were rated as fair quality. Out of 205 overall pooled outcomes, only 43 performance outcomes (21%) agreed with the CI phenomenon after the acquisition (18 out of 103), retention (19 out of 84), and/or transfer (6 out of 36) phases. No statistically significant overall difference between blocked and random practice was detected at post-acquisition (effect size (ES) = 0.1, p = 0.154), retention (ES = −0.159, p = 0.141) or transfer testing (ES = −0.243, p = 0.071). The subgroup analysis showed inferior acquisition and superior retention following random practice only in individuals aged 20–24 years (ES = 0.282, p = 0.030 during the acquisition, and ES = −0.405, p = 0.011 during retention), with no difference at transfer testing for this specific age group. No similar significant effects have been concurrently identified during both acquisition and retention phases in any of the remaining subgroups (e.g., examined based on experience level, sports, skills, and testing protocol categories). The present results suggest CI effects can only be confirmed under very limited conditions, which seriously challenges the extension of CI effects to the sport context in general. Problematic conclusions for children's learning are discussed, as well as future research strategies to better understand counterintuitive learning approaches.     

Effect on subsequent fixed-interval schedule performance of prior exposure to ratio and interval schedules of reinforcement

In three experiments, we examined the effect on the patterns of responding noted on fixed interval (FI) schedules of prior exposure to a range of interval and ratio schedules. Rats leverpressed for food reinforcement on random ratio (RR), random interval (RI), or variable interval (VI) schedules prior to transfer to FI schedules. In Experiment 1, prior exposure to an RR schedule retarded the development of typical FI patterns of responding. Exposure to a yoked RI schedule produced even greater retardation of typical FI performance. This effect was replicated in Experiment 2, using a within-subjects design. Rats responded on a multiple RR-RI schedule prior to a multiple FI-FI schedule. Typical FI performance emerged more slowly in the component previously associated with the RI than with that associated with the RR. In Experiment 3, exposure to an RR schedule retarded the development of FI performance to a greater extent than did exposure to a VR schedule. The latter schedule was programmed to allow the possibility that inhibitory control would develop after reinforcement. These results confirm that ratio schedules independently result in the disruption of FI responding. This effect was not long lasting and cannot be used plausibly to explain species differences in responding to FI schedules. However, it does suggest that temporal control—as manifested by the transfer of inhibitory control from one schedule to another—could facilitate movement between interval schedules.     

Partial reinforcement delayed extinction effect after regularly alternating reward training

When extinction is delayed very long, the superior resistance to extinction of the random schedule group relative to the alternating schedule group disappears (partial reinforcement delayed extinction effect, PRDE). Two experiments assessed the effects of reinforcement/nonreinforcement on Trial 1 on the PRDE. Following extended partial reinforcement acquisition training in a runway, rats received extinction training after a short (1-day) or long (23-day) retention interval. The schedules used in Experiment 1 were: a single-alternation (SA) schedule beginning each day with a rewarded (r) trial, for Group r-SA; an SA schedule beginning with a nonrewarded (n) trial, for Group n-SA; and a random (Rd) schedule, for Group Rd. The schedules and group names used in Experiment 2 were r-SA, Rd, and r-Rd. The results were that (1) rats given r-SA schedules yielded considerable resistance under delayed extinction, (2) those given Rd and r-Rd schedules showed a decline in resistance to extinction over a long retention interval, (3) those given the n-SA schedule showed relatively low resistance at both retention intervals, although retention deficit was not greater than in the case of the Rd schedule, and thus, (4) the PRDE was found in both experiments, although only weakly in Experiment 1. The results indicated that a regularly alternating reward pattern was a more important determinant than was type of reward on Trial 1 for the PRDE. The PRDE due to differential retention deficits among schedules is discussed on the basis of dual-process associative sequential mechanisms and cognitive rule-encoding mechanisms.     

Structural enhancement of learning

Structural learning aids, such as interactive overviews (IOs), have previously been shown to facilitate text comprehension and recall. In this study, we examined the effects of structural aids on learners’ structural knowledge and their performance on a procedural transfer task. In Experiment 1, 90 college students were presented definitions of computer programming concepts in an IO that was structured alphabetically, randomly, or in accordance with experts’ structural knowledge. Learning was assessed by examining students’ acquired knowledge structures and performance on a procedural transfer task that required integration and elaboration of the learned material in ways that went beyond the strictly definitional information provided during training. Students taught with the expert-structured IO acquired better knowledge structures and performed better on the transfer task than those using the other IOs. Experiment 2, utilizing 101 college students, showed that the visible structure, rather than the navigational constraints, of the expert IO was largely responsible for this advantage.     

The Effects of the Spacing of Test Trials and Study Trials in Paired‐association Learning

The learning effects due to test and study trials after the initial presentation were examined in a paired‐associate learning paradigm. In Experiment 1 both the spacing and retention intervals were systematically varied. The results showed advantages of spacing for both test and study trials. However, the spacing function of test trials interacted significantly with the retention interval. At a short retention interval, the second recall was a decreasing function of spacing and paralleled closely the initial recall. As the retention interval increased, the spacing‐of‐test function assumed an inverted U‐shape. Performance after repeated studies was on the average better than after test trials. Experiment 2 confirmed that when an initial presentation was followed by two test trials, an increasing spacing interval between each successive test trial produced optimal long‐term performance. In the case where a second study trial was coupled with a test trial, a pattern with equal interval length was better than other spacing patterns. The proportion of test trials of the study list was also varied among groups of subjects. A higher proportion of test trials resulted in better final recall.     

A comparison of the short-term memory performances of pigeons and jackdaws

Two experiments employed a delayed conditional discrimination procedure in which half the trials began with the presentation of food and half with no food; following a retention interval, subjects were presented with a choice between red and green keys, a response to one of which was reinforced according to whether the trial had started with food or no food. In Experiment 1, after 38 training sessions during which the retention interval was gradually increased, pigeons performed at a moderate level with intervals of 5 to 7.5 sec. A final test produced a steep forgetting function for food trials, but not for no-food trials; performance was unaffected by the duration of the intertriai interval (10 or 40 sec). Experiment 2 used the delayed conditional discrimination procedure to compare short-term memory in jackdaws (Corvus monedulus) with that in pigeons. Although the performance of the jackdaws was below that of the pigeons at the start of training, they showed more rapid learning over long delays, and, in the final test, a shallower forgetting function for food trials than that shown by pigeons. The results suggested superior short-term memory in jackdaws, which may help to explain the better performance of corvids in general when compared with that of pigeons in certain complex learning tasks.     

Frequent deadlines: Evaluating the effect of learner control on healthcare executives' performance in online learning

In a three-group, gender-matched, preexisting knowledge-controlled, randomized experiment, we evaluated the effect of learner control over study pace on healthcare executives' performance in an online statistics course. Overall, frequent deadlines enhanced distribution of practice and improved learning. Students with less control over pace (in groups with weekly deadlines) spaced their study episodes to a greater extent than their peers with more control over pace (in groups with monthly and end-of-course deadlines). Online learning experience and technology self-efficacy did not explain practice distribution effects. Student perceptions of control over how, when and in which order they learn did not differ significantly across experimental groups. However, perceived control and spaced practice were positively and significantly related to performance on tests of short delayed retention and near transfer. In addition, perceived control and spaced practice predicted performance on a test of delayed retention and far transfer. Locus of control did not explain differences in performance.     

Effects of achievement goals on self-control

Recent research has shown that achievement goals differ in their effects on working memory capacity and the metacognitive judgment of learning as part of the self-regulatory process. To extend this line of inquiry, we examined the effects of achievement goals on self-control, arguably the most critical subset of self-regulation. In three experiments, adolescent and early-adult learners were randomly assigned to mastery goal, performance-approach goal, and performance-avoidance goal conditions and performed self-control tasks in ego-depleting contexts. Students in the mastery goal condition demonstrated significantly better performance than students in the performance-approach goal condition on a task that required attentional control (Experiment 1) and inhibitory control after negative feedback (Experiments 2 and 3). The performance of students in the performance-avoidance goal condition did not differ significantly from that of students in the mastery goal or the performance-approach goal conditions. Planned-comparison ANCOVAs nonetheless revealed that, across all three experiments, the self-control performance of the students in the mastery goal condition was significantly better than that of the students in the two performance goal conditions combined. Mediation analysis further suggested that performance-approach and performance-avoidance goals evoked more task-irrelevant thoughts than mastery goals did, which subsequently interrupted students’ self-control performance (Experiment 3). We discuss the implications of the mechanisms underlying motivational influences on self-control for adolescents, who experience frequent self-regulation failures in learning contexts.     

Partial reinforcement effects on learning and extinction of place preferences in the water maze

In two experiments, two groups of rats were trained in a navigation task according to either a continuous or a partial schedule of reinforcement. In Experiment 1, animals that were given continuous reinforcement extinguished the spatial response of approaching the goal location more readily than animals given partial reinforcement—a partial reinforcement extinction effect. In Experiment 2, after partially or continuously reinforced training, animals were trained in a new task that made use of the same reinforcer according to a continuous reinforcement schedule. Animals initially given partial reinforcement performed better in the novel task than did rats initially given continuous reinforcement. These results replicate, in the spatial domain, well-known partial reinforcement phenomena typically observed in the context of Pavlovian and instrumental conditioning, suggesting that similar principles govern spatial and associative learning. The results reported support the notion that salience modulation processes play a key role in determining partial reinforcement effects.     

Interleaved practice in multi-dimensional learning tasks: Which dimension should we interleave?

Research shows that multiple representations can enhance student learning. Many curricula use multiple representations across multiple task types. The temporal sequence of representations and task types is likely to impact student learning. Research on contextual interference shows that interleaving learning tasks leads to better learning results than blocked practice, but this research has not investigated whether it matters on which dimension we interleave learning tasks. Many educational materials include multiple task types and multiple representations. Should we interleave representations or task types? We conducted a classroom experiment to investigate the effects of interleaving task types (while blocking representations) and interleaving representations (while blocking task types). The participants (158 5th- and 6th-graders) worked with a corresponding version of an intelligent tutoring system for fractions. Our results show an advantage for interleaving task types over interleaving representations. These results extend prior work on contextual interference by showing that this effect is sensitive to the dimension being interleaved. We also extend the literature on learning with multiple representations by investigating the effect of interleaved practice with different representations. The results provide guidance to designers of complex curricula.     

How to guide learners' processing of multimedia lessons with pedagogical agents

Two experiments examined the effects of a pedagogical agent's (PA's) pointing gestures, eye gaze, and eye contact on learning processes (measured by learners' eye fixations on relevant elements) and learning outcomes (as measured by retention and transfer test scores) with a multimedia lesson on neural transmission. In Experiment 1, having the PA look at and point to relevant elements as she lectured led to more eye fixations on the relevant portion of the graphic and better retention and transfer test scores. Keeping eye contact with learners tended to improve retention test scores and increased their eye fixations on relevant elements when the PA also looked at and pointed to the graphic. In Experiment 2, the PA's pointing gestures as a stand-alone feature caused better retention test scores and more fixations on relevant elements of the graphic, but eye gaze direction did not. These findings help extend the embodiment principle.     

Mathematics practice without feedback: A desirable difficulty in a classroom setting

Recent research highlights the potential benefits of practice without feedback on learner’s strategy knowledge. However, most prior work has been conducted in one-on-one settings with short retention intervals. We compared the effects of mathematics practice with and without correct-answer feedback on immediate and 1-week delayed performance in a classroom setting. In a randomized experiment, 243 second- and third-grade children received strategy instruction and then practiced solving relevant problems in small groups within their classroom. During practice, children received immediate feedback (after each problem), summative feedback (after all the problems in the set), or no feedback. During the practice task, immediate feedback led to the best performance. However, practice without feedback led to higher levels of mastery on the 1-week knowledge retention test. Thus, instructional practices that seem less effective at first can, for some children, ultimately result in more desirable learning.     

Exploring the necessary conditions for observing interleaved practice benefits in math learning

Previous research has demonstrated benefits of interleaved practice over blocked practice for learning mathematical formulas. This experiment tested whether the benefits from interleaved practice would generalize to more complex problems, where the problem type must be inferred from information in the problem. We compared delayed test performance of participants assigned to blocked practice to participants assigned to interleaved practice who had high or low practice performance. University students (M_age = 18.97, SD_age = 1.50, 64% female) learned how to solve probability word problems in blocked practice, interleaved practice, or hybrid conditions that included both kinds of practice. Conditions that included some interleaved practice outperformed a condition that included only blocked practice at delayed test. Participants with high performance on interleaved practice problems outperformed participants assigned to blocked practice at delayed test. These results suggest that interleaved practice can confer learning advantages even for more complex problems.     

Anatomical knowledge gain through a clay‐modeling exercise compared to live and video observations

Clay modeling is increasingly used as a teaching method other than dissection. The haptic experience during clay modeling is supposed to correspond to the learning effect of manipulations during exercises in the dissection room involving tissues and organs. We questioned this assumption in two pretest–post‐test experiments. In these experiments, the learning effects of clay modeling were compared to either live observations (Experiment I) or video observations (Experiment II) of the clay‐modeling exercise. The effects of learning were measured with multiple choice questions, extended matching questions, and recognition of structures on illustrations of cross‐sections. Analysis of covariance with pretest scores as the covariate was used to elaborate the results. Experiment I showed a significantly higher post‐test score for the observers, whereas Experiment II showed a significantly higher post‐test score for the clay modelers. This study shows that (1) students who perform clay‐modeling exercises show less gain in anatomical knowledge than students who attentively observe the same exercise being carried out and (2) performing a clay‐modeling exercise is better in anatomical knowledge gain compared to the study of a video of the recorded exercise. The most important learning effect seems to be the engagement in the exercise, focusing attention and stimulating time on task. Anat Sci Educ 7: 420–429. © 2014 American Association of Anatomists.     

内隐学习中象形文字促进幼儿汉字字形记忆的研究

以100名4-5岁中班幼儿为研究对象,采用任务分离范式考察内隐学习条件下象形文字(东巴文、甲骨文)对幼儿汉字字形记忆的影响。该篇研究包括两个实验,幼儿均通过颜色判断任务进行学习,实验1采用再认任务考察象形文字对幼儿汉字字形外显记忆的影响,实验2采用偏好判断任务考察象形文字对幼儿汉字字形内隐记忆的影响。研究发现,在内隐学习条件下,甲骨文比东巴文更能够促进汉字字形的外显记忆,象形文字可以成为幼儿汉字学习的良好辅助材料。     

Infusing Physical Activities Into the Classroom: Effects on Preschool Children's Geography Learning

In this intervention study, we investigated the effects of physical activities that were integrated into a geography task on preschool children's learning performance and enjoyment. Eight childcare centers with 87 four‐to‐five‐year‐old children were randomly assigned across an integrated physical activity condition, an unintegrated physical activity condition, and a control condition without physical activity. Children learned the names and a typical animal from each of the six continents using a floor‐mounted world map with soft toy animals. Both learning conditions with physical activities showed higher performance than the learning condition without physical activities on an immediate retention test, and on a delayed retention test administered five weeks later. In addition, children in the physical activity conditions (integrated and nonintegrated) enjoyed their learning method the most. Infusing task‐relevant physical activities into the classroom and the learning task is discussed as a promising way to improve children's learning, enjoyment, and health.     

Children's response characteristics in a structured self-paced learning task

Fourth and fifth-grade children identified as fast/inaccurate and slow/accurate responders on the basis of the Matching Familiar Figures test were administered a self-paced learning task. The task consisted of a 25 word categorizable list composed of five instances from each of five categories. Four treatment conditions, the usual random presentation and blocked presentation conditions plus random presentation with instructions and blocked presentation with instructions, were employed. Analysis of variance was used to analyze clustering, free recall, and cued recall performance. A significant main effect for type of treatment was found in clustering performance. A significant instruction by response style interaction in the analysis of free call performance indicated that while fast/inaccurate responders benefit from instructions, slow/accurate responders did not. When children identified as fast/inaccurate or slow/accurate were placed in self-paced learning situation, no significant difference was found in total viewing time of the stimulus materials.     

The effect of mindfulness on extinction and behavioral resurgence

In the present experiments, we investigated the effects of mindfulness on behavioral extinction and resurgence. Participants received instrumental training; either they received FI training (Experiment 1), or they were trained to emit high rates and low rates of response via exposure to a multiple VR yoked-VI schedule prior to exposure to a multiple FI FI schedule in order to alter their rates of responding learned during Experiment 2. Participants were then exposed to either a focused- (mindfulness) or an unfocused-attention induction task. All participants were finally exposed to an extinction schedule in order to determine whether a mindfulness induction task presented immediately prior to extinction training affected extinction (Experiment 1) and behavioral resurgence (Experiment 2). During the extinction phase, the rates of responding were higher in the control group than in the mindfulness group, indicating that the mindfulness group was more sensitive to the contingencies and, thus, their prior performance extinguished more readily (Experiment 1). Moreover, rates of response in the extinction components less precisely reflected previous training in the mindfulness group, suggesting less resurgence of past behaviors after the mindfulness induction (Experiment 2).     

Pictorial presentation and review strategies in science learning

To test the effects of pictorial presentation and a pictorial review task on science learning, all-verbal or verbal-pictorial presentation conditions were followed by either pictorial practice or a control task. The 96 undergraduate participants were randomly assigned to one of the four conditions presented on a computer-assisted instruction terminal. The groups differed significantly on a pictorial recognition test but not on a verbal posttest. The results favored the pictorial presentation with review condition. Experiment Two tested the effectiveness of the pictorial review task compared to a read-twice control. The same all-verbal presentation condition was given to 50 undergraduates who were then randomly assigned to the pictorial review task or to the re-read condition. The pictorial review condition facilitated performance on the pictorial posttest relative to the re-read condition and produced more favorable attitudes as well.     

Working memory capacity and disfluency effect: an aptitude-treatment-interaction study

According to Cognitive Load Theory, learning material should be designed in a way to decrease unnecessary demands on working memory (WM). However, recent research has shown that additional demands on WM caused by less legible texts lead to better learning outcomes. This so-called disfluency effect can be assumed as a metacognitive regulation process during which learners assign their cognitive resources depending on the perceived difficulty of a cognitive task. Increasing the perceived difficulty associated with a cognitive task stimulates deeper processing and a more analytic and elaborative reasoning. Yet there are studies which could not replicate the disfluency effect indicating that disfluency might be beneficial only for learners with particular learner characteristics. Additional demands on working memory caused by disfluent texts are possibly just usable by learners with a high working memory capacity. Therefore the present study investigated the aptitude-treatment-interaction between working memory capacity and disfluency. Learning outcomes were measured by means of a retention, a comprehension, and a transfer test. Moreover, the three types of cognitive load (intrinsic, extraneous, and germane) were assessed. The results revealed significant aptitude-treatment-interaction effects with respect to retention and comprehension. Working memory capacity had a significant influence only in the disfluency condition: The higher the working memory capacity, the better the retention and comprehension performance in the disfluency condition. No effects were found with respect to transfer or cognitive load. Thus, the role of metacognitive regulation and its possible effects on cognitive load need further investigation.