The primary goal of instruction should be to facilitate long-term learning-that is, to create relatively permanent changes in comprehension, understanding, and skills of the types that will support long-term retention and transfer. During the instruction or training process, however, what we can observe and measure is performance, which is often an unreliable index of whether the relatively long-term changes that constitute learning have taken place. The time-honored distinction between learning and performance dates back decades, spurred by early animal and motor-skills research that revealed that learning can occur even when no discernible changes in performance are observed. More recently, the converse has also been shown-specifically, that improvements in performance can fail to yield significant learning-and, in fact, that certain manipulations can have opposite effects on learning and performance. We review the extant literature in the motor- and verbal-learning domains that necessitates the distinction between learning and performance. In addition, we examine research in metacognition that suggests that people often mistakenly interpret their performance during acquisition as a reliable guide to long-term learning. These and other considerations suggest that the learning-performance distinction is critical and has vast practical and theoretical implications.

Learning versus performance: an integrative review.

A critical aspect of perception‐action coupling is the ability to modify ongoing actions in accordance with variations in the environment. Infants’ ability to modify their gait patterns to walk down shallow and steep slopes was examined at three nested time scales. Across sessions, a microgenetic training design showed rapid improvements after the first session in infants receiving concentrated practice walking down slopes and in infants in a control group who were tested only at the beginning and end of the study. Within sessions, analyses across easy and challenging slope angles showed that infants used a ‘braking strategy’ to curb increases in walking speed across increasingly steeper slopes. Within trials, comparisons of infants’ gait modifications before and after stepping over the brink of the slopes showed that the braking strategy was planned prospectively. Findings illustrate how observing change in action provides important insights into the process of skill acquisition.

Change in action: how infants learn to walk down slopes

Variable practice with lenses improves visuo-motor plasticity

Astronauts experience disturbances in balance and gait function when they return to Earth. The highly plastic human brain enables individuals to modify their behavior to match the prevailing environment. Subjects participating in specially designed variable sensory challenge training programs can enhance their ability to rapidly adapt to novel sensory situations. This is useful in our application because we aim to train astronauts to rapidly formulate effective strategies to cope with the balance and locomotor challenges associated with new gravitational environments-enhancing their ability to "learn to learn." We do this by coupling various combinations of sensorimotor challenges with treadmill walking. A unique training system has been developed that is comprised of a treadmill mounted on a motion base to produce movement of the support surface during walking. This system provides challenges to gait stability. Additional sensory variation and challenge are imposed with a virtual visual scene that presents subjects with various combinations of discordant visual information during treadmill walking. This experience allows them to practice resolving challenging and conflicting novel sensory information to improve their ability to adapt rapidly. Information obtained from this work will inform the design of the next generation of sensorimotor countermeasures for astronauts.

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Enhancing astronaut performance using sensorimotor adaptability training

Procedural and declarative knowledge of word recognition and letter decoding in reading an artificial script.

This study used a forehand hitting task to explore the effect of racket variability on 'out of range' transfer. 48 11-yr.-old girls were randomly assigned to four treatment groups of Random Variability, Blocked Variability, Specific, and Control. The experimental groups had 32 trials for 4 successive days after which all groups were tested on 4 transfer conditions. Retention tests were given after 1, 4, and 8 days and the data were examined for treatment, range, and occasion effects. Analysis showed the superiority of practice over no practice, variable over specific practice, and random over blocked variability for transfer with two 'out of range' dimensions. Accuracy decayed between the transfer tests. These results are consistent with schema theory, and it is recommended that physical education teachers should focus variable practice on task dimensions that are new to their classes.

D. Penelope Green

Papers

Practice Variability and Transfer of a Racket Skill