Perceptual and Motor Skills

People with intellectual disabilities are often reported as having depressive symptoms. Although the antidepressant effect of exercise has been systematically recognized, research concerning the role of exercise on depressive symptoms in people with intellectual disabilities is still scant. A 12-wk. exercise intervention for depressive symptoms in a group of adults with intellectual disabilities was conducted. Participants were 16 men and 11 women, randomly assigned to an exercise group (n = 14) or to a control group (n = 13). The Zung Self-Rating Depression Scale adapted for people with intellectual disabilities was administered at baseline, after 6 wk. and at the end of the intervention. There were statistically significant reductions in scores for the exercise group compared with the control group. Results support the notion that exercise can improve well-being in people with intellectual disabilities.

This study was conducted to compare mechanical work during vigorous walking (which utilizes greater arm swings and step lengths) with that during normal walking and to examine whether individual differences (delta: vigorous walking – normal walking) in mechanical work during vigorous walking affected oxygen uptake (VO₂). Six adult men (M age = 28.5yr., SD = 3.9) performed normal and vigorous walking on a treadmill at 1.11, 1.53, and 1.94 m/sec. At all speeds, external work during vigorous walking was greater than that during normal walking, and the delta of total work was significantly correlated with that of VO₂. Thus, it was suggested that increased mechanical work (particularly total work) in vigorous walking would increase the metabolic cost.

The induction of self-organization during running with a special harness may lead to reduced energy requirements. This experiment was designed to investigate the effect of practicing with a rubber tubing constraint attached between the heel and the hip for 7 wk. (18 treadmill running sessions) on oxygen consumption, caloric unit cost, blood lactate concentration, and muscle activity. 18 male recreational runners (M age = 26.3yr.) were assigned to either an intervention or a control group. The intervention group trained with the constraint and the control group trained without it. Test 1 was conducted before the intervention, Test 2 after the intervention, and Test 3 7 wk. after Test 2 (no training between Tests 2 and 3). At Test 1, lactate and muscle activity were significantly increased during constrained running. For lactate, a significant decrease was found in the intervention group for running with the constraint; at Test 3, lactate returned to Test 1 level. No notable changes occurred in the physiological parameters. Furthermore, there was no observed transfer effect on normal running.

A 1995 data set from a survey of college students carried out by the Centers for Disease Control was examined to explore whether participation in sports was associated with recent suicidal behavior. Overall, participation in college sports was associated with a reduced incidence of suicidal ideation in the past year, but had no association with attempted suicide in the past year. However, this protective effect was found for European American students, Hispanic Americans, and Asian Americans, but not for African Americans, and was stronger for male students than for female students.

The present paper assesses the relationship between sex and motivation in triathletes utilising a multidimensional measurement of motivation in sports. Data were collected from 138 triathlon participants (age range 17–72 years): 95 men (M = 36.7yr., SD = 10.7) and 43 women (M = 34.6yr., SD = 9.9). Measures included the Sport Motivation Scale, a multi-dimensional measure to assess different types of athletes' motivations for practising their sport. Results showed a significant sex difference in amotivation, with women displaying lower scores; but amotivation scores were very low. The results were not dependent on competition level or age. Men and women competing at the international level in triathlon have similar motivational profiles.

The goal was to assess the aerobic capacity of boxers and its relation with sport mastery. Participants were 12 boxers from the Lithuanian national team (VO₂max −58.03±3.00ml/kg/min) of different weight classes. Their sport mastery ranking was established according to their achieved results during the last years of participation in amateur boxing contests. In a graduated treadmill running test, the boxers' aerobic capacity indices were established. Running speed at first and second ventilatory thresholds, VO₂max, and maximal oxygen pulse had moderate to strong correlations with the boxers' sport mastery ranking. Aerobic capacity is an important fitness component of boxers in all weight categories. Special attention should be paid to development of cardiac capacity in the boxers' training processes, as with aerobic power and anaerobic threshold training.

Unconscious priming is sensitive to contextual factors. The present study examined this adaptive process using masked arrow primes (« or »). Some targets required specific ‘fixed’ left/right responses (« or ») and others required ‘free’ left/right responses (<>). Different groups (n = 30 each) received response-congruent primes (SOA=75msec.) on 0.2, 0.5, or 0.8 of the fixed-response trials. Fixed responses were facilitated by congruent primes and free responses were faster when congruent with the prime. Critically, these masked priming effects emerged only in the 0.8 group. The pattern of extant prime-proportion effects in this paradigm best supports an adaptive associative-strength account rather than memory-recruitment or response-bias-suppression accounts.

The present study investigated the effects of the frequency of knowledge of results (KR) on both generalized motor programs and parameters. Two experiments were conducted that compared two frequencies of KR in terms of generalized motor programs and parameters: (1) the first experiment compared the effects of KR frequency on generalized motor programs in the 100% and 50% groups; and (2) the second experiment compared the effects of reduced KR frequency on parameters in the 100% and 50% groups. In the first experiment, results showed that the 50% group exhibited smaller relative timing errors than did the 100% group, but absolute timing errors in the transfer test were similar between these two groups. In the second experiment, both groups exhibited similar relative and absolute timing errors. These results suggested that the beneficial effects of reduced KR frequency were restricted to generalized motor programs.

Recent studies suggest that even short-term video game training may transfer to other cognitive tasks. With the popularity of the Nintendo Wii with women, more of them might be exposed to the games that will increase their mental rotation skills. Because performance on mental rotation tests (MRT) has been linked to math performance in women, and thus may ultimately contribute to the under-representation of women in STEM fields, it is important to continue to explore ways to decrease or eliminate the robust sex difference in mental rotation. The present study of 30 men and 30 women provides additional evidence that women may benefit from short-term (1 hour) training on either a Nintendo Wii™ or GameCube console to increase their mental rotation skills. One hour of video game training not only increased women's MRT scores to a level similar to men's scores, but also produced greater average improvement for women, even when controlling for experiential factors such as spatial and masculine childhood activities that could contribute to the sex difference in spatial ability.

This study investigated differences between 50- to 70-yr.-old taxi and non-taxi drivers with respect to cognitive process-related skills. Psychological indicators associated with perceptuomotor, attentional, and spatial memory recall abilities were collected for 173 taxi drivers (7 women, 166 men; M age = 57.5yr.) and 175 non-taxi drivers (85 women, 90 men; M age = 58.2yr.). The taxi drivers had shorter reaction times and motor times in response to stimuli in simple stimulus-response tasks. There was an age-related decline in monocular vision detection on both sides, processing speed for fovea stimuli, and higher-level cognition for drivers. Accordingly, the frontal visual information processing speed of the taxi drivers was superior to the non-taxi drivers, but a distinct age-related decline was observed for all drivers.

This study analyzes the differences in manual reaction time (RT) to visual stimuli in two samples of physically active persons: a group of athletes without hearing impairment (n = 79; M age = 22.6yr., SD = 3.7) and a group of athletes with hearing impairment (n = 44, M age = 25.6 yr., SD = 5.0). Reaction time (RT) was measured and then differences between both groups were assessed by sex, type of sport (individual vs team sports), and competition level. RT to visual stimuli was significantly shorter for athletes with hearing impairment than for those without hearing impairment, with a significant sex difference (shorter RT for males), but no differences regarding type of sport or competition level. Suggestions for further research and sport applications are provided.

Warm-up has been shown to mediate numerous acute physiological alterations that have been purported to confer beneficial effects on performance. This study investigated the acute effects of different warm-up procedures on resistance training performance. Employing a randomized, counterbalanced crossover design, 15 men performed 3 exercises (4 sets of bench press, squat, and arm curl at 80% of 1RM) to failure in 4 conditions (control, specific, aerobic, and combined). Outcome measures included the sum of repetitions and a fatigue index measuring the decline between sets. There was no significant difference for the sum of repetitions or for fatigue index among conditions for the 3 exercises. Performance in the resistance training exercises was not influenced by warm-up.

This study investigated enjoyment and naturalness of movement perceived during short bouts of exercise with three aerobic machines: treadmill, elliptical crosstrainer, and Vario. The participants were 72 experienced and 60 inexperienced users. Immediately after the exercise with each machine, they filled in a 12-item form of the Physical Activity Enjoyment Scale (PACES) and a Visual Analogue Scales (VAS) about naturalness of movement. Results showed significant within-subjects differences on all scales; exercise with the treadmill and Vario were perceived to be similarly enjoyable and more enjoyable and natural in comparison with the elliptical crosstrainer. Differences in naturalness ratings between experienced and inexperienced users were observed. Exercise was not equally enjoyable when performed with different aerobic machines, and this should be considered by professionals when prescribing aerobic training to enhance motivation and adherence.

Two experiments were conducted to investigate whether mental practice can serve as an effective intervention strategy for decreasing interference effects of distracting noise at the time of executing open (badminton service return) and closed (badminton serve) skills. In Experiment 1, 44 male students participated and in Experiment 2, 36 students participated. In both experiments, students were randomly assigned to one of three groups: (a) mental practice, (b) mental practice plus noise distraction (MPD), and (c) control. All participants performed 40 trials in the acquisition phase and 20 trials in the retention phase. Absolute error and adjusted variable error were recorded to measure performance. Experiment 1 showed that for a closed skill, the MPD group served with greater accuracy than did the control group in both acquisition and retention phases. Experiment 2 showed that for the open skill, the MP group performed with less error than did the control group, but only in the acquisition trials. Results indicate that mental practice may function to block out noise disturbances and that mental practice may work differently with different skill sets.

The goal was to examine whether visuomotor control and choice response time shared age-related developmental trajectories, and if prior computer experience played an important role in control processes. Children (6–7, 8–9, 10–11 yr.), younger adults (24 yr.) and older adults (76 yr.) performed the cursor pointing and choice response time (CRT) tasks with a computer mouse. Participants moved the mouse cursor back and forth to click two targets on the screen as fast and accurately as possible. In the CRT, based on visual stimuli, participants moved and clicked one of the three targets on the screen as fast and accurately as possible; the time between stimulus onset and clicking the correct target was recorded as the choice response time. Visuomotor performance increased with age to younger adulthood but was worse in the older adult group. CRT performance was also positively related to age among the groups of children, with scores leveling off in the young adult group. Computer experience was statistically significantly related only to visuomotor control, but not to CRT. Optimal CRT performance required only sub-optimal visuomotor control. Cognitive and sensory age declines may be related to the poorer CRT performance in the oldest age group.

Ratings of perceived exertion in 66 firefighters before, during, and immediately after performing 20min. of fire suppression training were self-reported by the participants using the OMNI Walk-Run Scale and also recorded by a trained observer. The observer used the same definition of perceived exertion, instructions, and high and low anchoring procedures as the participants. Self-reported and observed ratings of perceived exertion did not differ before or during fire suppression training. Significant differences were noted between the self-reported and observed ratings immediately after fire suppression training. These findings support the use of direct observation to provide estimates of ratings of perceived exertion during fire suppression training.

Faces and written words are two of the most familiar types of visual patterns with the brain's selective response of N170 component in early perception. Using ERP adaptation paradigms, studies have found the N170 response is reduced when there is repeated presentation of upright faces relative to a control condition. In contrast to these well-established features of the face-related N170 adaptation effect, the characteristics of the N170 adaptation effect for printed words are less clear. The goal was to investigate the ERP adaptation effects of printed language (English words and Chinese characters) in a short ISI (200msec.) adaptation paradigm. The present study showed that both alphabetic words and non-alphabetic words could produce a rapid N170 adaptation effect. Objects of expertise (e.g. words and faces) can produce a rapid N170 adaptation effect but other objects (e.g., houses) cannot, indicating that the specific stimuli have some specific mechanisms for the rapid N170 adaptation.

The aim of this study was to examine the influence of yoga practice on body image satisfaction in men. Male Figure Drawings were used to explore body image satisfaction in yoga beginners (n = 26, M age = 40.3yr., SD = 11.6), experienced yoga practitioners (n = 22, M age = 46.4yr., SD = 11.6), and non-yoga practicing aerobic and weight training exercisers (n = 34, M age = 41.2yr., SD = 11.9). Satisfaction was significantly higher among the yoga groups than the exercisers. There was no statistical difference between the body satisfaction scores of the experienced yoga group and the beginner yoga students. This may suggest that individuals drawn to yoga have greater body satisfaction than exercisers, and that regular yoga practice possibly further increases body satisfaction.

This study investigated the errors in the perceived height of virtual cones presented on the screen. 80 students (50 women, 30 men; M age = 18.8yr., SD = 1.2 using a duodecimal system) participated in the study. They judged the height of virtual cones in several conditions: (a) different spaces between the items in the array (2, 4, and 6 cm); (b) different viewing directions – bottom-up or top-down; (c) cones presented in different forward-rotated angles (15, 30, and 45°). Results indicate that fewer errors in the perceived heights of virtual cones were made when: the space between items was 2 cm, judgment was made in a bottom-up view and at a 15° angle. These results may have implications for graphics-based interface design such as interior design, driver navigation systems, geological models, and flight-simulation systems.

The present study is an attempt to replicate the 1992 findings of Rock and Mitchener that knowing about the ambiguity in ambiguous images is necessary for seeing reversals. In contrast to Rock and Mitchener's study, the present study used a between-subjects design, in which 190 participants were randomly assigned to either an uninformed or an informed condition, and saw 12 images, 6 ambiguous and 6 unambiguous. The findings show that participants in the informed condition were significantly more likely to see reversals in the ambiguous images than were those in the uninformed condition. In contrast to Rock and Mitchener's findings, knowledge of ambiguity did not ensure that all informed participants saw all six reversals; there were spontaneous reversals in the uninformed condition for most of the images. These findings are discussed in terms of suggesting that seeing a reversal in an ambiguous image is a complex process that requires consideration of the interplay of visual perception and higher order cognition.

None of the tasks used to induce boredom have undergone rigorous psychometric validation, which creates potential problems for operational equivalence, comparisons across studies, statistical power, and confounding results. This methodological concern was addressed by testing and comparing the effectiveness of six 5-min. computerized boredom inductions (peg turning, audio, video, signature matching, one-back, and an air traffic control task). The tasks were evaluated using standard criteria for emotion inductions: intensity and discreteness. Intensity, the amount of boredom elicited, was measured using a subset of the Multidimensional State Boredom Scale. Discreteness, the extent to which the task elicited boredom and did not elicit other emotions, was measured using a modification of the Differential Emotion Scale. In both a laboratory setting (Study 1; N = 241) and an online setting with Amazon Mechanical Turk workers (Study 2; N = 416), participants were randomly assigned to one of seven tasks (six boredom tasks or a comparison task, a clip from Planet Earth) before rating their boredom using the MSBS and other emotions using the modified DES. In both studies, each task had significantly higher intensity and discreteness than the comparison task, with moderate to large effect sizes. The peg-turning task outperformed the other tasks in both intensity and discreteness, making it the recommended induction. Identification of reliable and valid boredom inductions and systematic comparison of their relative results should help advance state boredom research.

Stamps (2013) reported that the visual permeability of a boundary strongly influenced perceived enclosure, while boundary depth had almost no effect. Specifically, Stamps found that perceived enclosure demonstrates a highly negative correlation with distal permeability, a moderately negative correlation with proximate permeability, and a very low positive correlation with distal distance. The present comment suggests that environmental properties may affect physical perception, mental processes, and human behavior – not only in a physical but also in a social environment.

This study examined the association between spontaneous finger tapping and cognitive function, with a detailed analysis of the two main phases of finger tapping, the touch-phase and the off-phase. 170 elderly patients (83 men, 87 women; M age = 82.1yr., SD = 6.2) underwent cognitive assessment including the Mini-Mental State Examination, a forward digit span test, and 15sec. of finger tapping. Results indicated a significant increase in the length and variability of the finger-touch phase among participants with mild cognitive impairment or dementia compared to participants with no cognitive impairment, suggesting a relationship between finger tapping and attention, short-term memory, and cognitive diagnosis. Pattern classification analyses on the finger tapping parameters indicated a specificity of 0.91 and sensitivity of 0.52 for ruling out cognitive impairment.

To address the obesity epidemic there is an increasing effort to emphasize physical activity and fitness in adolescence as opposed to fundamental motor skills. However, what effect this might have on health-related fitness is unclear. This study sought to determine the degree to which motor development competencies in preschool could predict high school fitness. In the initial study, participants were 143 male and 139 female preschoolers (M age = 4.8yr., SD = 0.7) from four preschool programs in suburban area of a Southern state who completed the Test of Gross Motor Development. Eleven years later, 75 boys and 65 girls (M age = 15.8yr., SD = 0.7) from the original sample were located and completed the AAHPERD Health Related Fitness Test (1.5mile run, sit-up, sit-and-reach, body fat percentage). Test of Gross Motor Development scores were found to be strong predictors for all measures of fitness, but object control skills were more predictive of overall physical fitness than locomotor skills. Therefore, educators should consider teaching sport skill development in early childhood over general activity to improve long-term fitness.

Previous research has shown American adults exhibit a systematic navigational bias to favor moving to the right when locomoting around obstacles and other people. To further investigate how and when the right-side navigational bias develops, the authors tested pre-school and early elementary school aged American children. Children ran down a straight pathway with an object at the center of the end-line. Unlike replicated findings with adults, both pre-school and early elementary school aged children showed no tendency to favor either side of the object. These findings support that the rightward navigation bias found in adults is not present in children up to elementary school, and suggest that the onset of bias occurs during the age range of late elementary or secondary school.

There may be a higher-order processing system (or general proprioceptive ability) which receives inputs from various proprioceptive sources across different body areas. In general, Tremblay's (2013) criticisms are overly based on peripheral proprioceptors, and do not represent alternative interpretations or the data generated by studies evaluating those interpretations.

This study assessed the sensitivity to functional change of the total score on age- and severity-relevant dimensions (Goal Total score) of the Gross Motor Function Measure (GMFM)-88 compared with GMFM-88 Total, GMFM-66, and Pediatric Evaluation of Disability Inventory (PEDI) Mobility scores in children with cerebral palsy (CP). Correlations among the four parameters were calculated to assess how sensitivity may differ according to the severity of CP. 64 children with CP (M age=43.8 mo., SD=16.5, range=21 to 84 mo.; 36 boys, 28 girls) were recruited. The GMFM and PEDI assessments were performed over an interval of 6 mo. The effect sizes for changes over time were large (0.88 to 1.26) for the selected GMFM-88 Goal Total scores. The minimally important differences of the GMFM-88 Goal Total scores were within the mean range of change, with CP severity categorized as GMFCS Levels I/II, Level III, and Levels IV/V. The selected GMFM-88 Goal Total scores showed from poor to good correlations with GMFM-88 Total, GMFM-66, and PEDI Mobility scores. The results indicated that age- and severity-relevant GMFM-88 Goal Total scores were the optimal parameter to detect meaningful change in children with CP for clinical and research use.

Recent literature has shown the possibility of enabling individuals with multiple disabilities to make telephone calls independently via computer-aided telephone technology. These two case studies assessed a modified version of such technology and a commercial alternative to it for a woman and a man with multiple disabilities, respectively. The modified version used in Study 1 (a) presented the names of the persons available for a call and (b) reminded the participant of the response she needed to perform (i.e., pressing a microswitch) if she wanted to call any of those names/persons. The commercial device used in Study 2 was a Galaxy S3 (Samsung) equipped with the S-voice module, which allowed the participant to activate phone calls by uttering the word ‘Call’ followed by the name of the persons he wanted to call. The results of the studies showed that the participants learned to make phone calls independently using the technology / device available. Implications of the results are discussed.

Diniz, R. C. R., Martins-Costa, H. C., Machado, S. C., Lima, F. V., & Chagas, M. H. (2014) Repetition duration influences ratings of perceived exertion. Perceptual & Motor Skills: Physical Development & Measurement, 118, 1, 261–273. DOI: 10.2466/03.06.PMS.118k11w6

The authors wish to correct Footnote 2 on page 261 to read:

²The authors thank André Gustavo Pereira de Andrade, Ph.D., for assistance in the statistical analysis of this study and FAPEMIG (Fundação de Amparo à Pesquisa do Estado de Minas Gerais) for assistance with financial resources for the research.