Task-specificity of balance training

Despite much research on balance training, it is still unclear whether balance training leads to highly task-specific adaptations or rather non-specific adaptations. Hence, in this study we examined whether balance training increased performance only in the balance task that was trained or also in non-trained tasks. Forty healthy participants (28 m 12 f, 25 ± 4 years, 177 ± 10 cm, 73 ± 14 kg) were assigned to one of two training groups (TGs) or a control group. Both TGs completed six sessions over 2 weeks, only the training device differed. Before and after the training, performance in the trained task as well as in additional untrained tasks was recorded. ANOVAs showed that each TG outperformed the other groups only in the task they had trained (e.g., task trained by TG1: +225% in TG1, only +41% and +30% in TG2 and control, group * time interaction, p < 0.001; Untrained task 1: TG1 +48%, TG2 +48%, and control +30%, no significant interaction, p = 0.72). In summary, 2 weeks of balance training resulted in highly task-specific effects, no transfer even to very similar tasks was observed. Therefore, we recommend identifying and training exactly those tasks that need improvement, and test the efficacy of training programs using specific tests instead of general tests with limited functional relevance.     

Safety implications of co-locating road signs: A driving simulator investigation

BackgroundAs road complexity increases the requirement for number of road signs also increases, although the amount of road side space does not. One practical strategy to address this is to present multiple road signs on the same gantry (sign co-location). However, there is very little research on the safety implications of this practice.Method36 participants (mean age = 42.25 years, SD = 13.99, 18 females) completed three driving simulator scenarios, each scenario had a different sign co-location condition: no co-location, dual co-location and triple co-location. Each scenario presented similar information using direction signs, variable message signs and variable speed limit signs, under. Each drive included standard motorway driving (100 km/h speed zone) in free flow traffic and one emergency event where a lead vehicle suddenly braked. The scenario order was counterbalanced and the emergency event vehicle varied.ResultsOverall, there was no impact of co-locating signs on general driving performance. No significant difference was observed between conditions for reaction time and minimum headway in response to the emergency event. Participants were able to correctly choose their destination whether the signs were co-located or not.DiscussionFor the particular configuration of signs tested there is no evidence that co-location negatively impacts driving performance. However, there may be some implications for travel speed and the manner in which the emergency event is responded to. Future work should confirm the findings on real roads. These findings provided support for sign co-location as a practical and safe option for displaying multiple road signs in a confined area.     

Effects of reduced threshold of automated speed enforcement on speed and safety

This study was designed to evaluate the effects of a reduced threshold of the fixed automated speed enforcement system on speed and safety on a two-lane rural road. The threshold was lowered from 20 km/h to 4 km/h and the public was informed about the change. Driving speeds on the experimental and control road before and after the change were compared. The main results showed that the reduced threshold decreased the mean speed by 2.5 km/h, the standard deviation of speed by 1.1 km/h and the proportion of exceeding vehicles by 11.8 percentage units. In conclusion, lowering the threshold of automated speed enforcement combined with an appropriate information campaign bring about a significant speed reduction that could contribute to substantial safety benefits.     

Footbridge usage in high-traffic flow highways: The intersection of safety and security in pedestrian decision-making​

In the Decade of Action for Road Safety, the vulnerability of pedestrians to severe outcomes from road crash is well-recognised. This study explored the factors that are influential in pedestrians’ decisions to cross a high-traffic highway in Barranquilla, Colombia, by using a footbridge over the highway, or by cutting across the highway in close proximity to a footbridge. Participants were recruited at each crossing (n = 105 footbridge, n = 105 ground; n = 117 males; M(SD) age = 23.28(5.98) years) and completed a paper survey exploring demographics, highway crossing behaviour, and attitudes regarding the safety and security of the crossing. Despite the majority of participants reporting the ground crossing was dangerous, and that the footbridge crossing was safe, one third of participants never or rarely (approximately 0% and 25% of the time) used the footbridge to cross the highway. Logistic regression revealed that the decision regarding the highway crossing mode (footbridge or ground) was predicted by (a) the frequency in which the footbridge is crossed, (b) the perception of footbridge security in relation to crime, (c) the perception of footbridge safety about traffic conflicts in general, (d) the proximity of the footbridge to the highway ground crossing, and (e) if the subject had experienced an injury during a previous highway crossing. The findings extend our understanding of pedestrian behaviour in crossing highways, not only in relation to the use of footbridges which separate both road user groups, but also ground crossings which place the pedestrians at significant risk especially those in areas with high traffic flow density. Moreover, the findings highlight the complexity involved in improving pedestrian road safety, particularly as the provision of an engineering solution (a footbridge) in close proximity to a high-risk zone (highway) is clearly not the only solution in the much larger road safety system.     

Rational action selection in 1½- to 3-year-olds following an extended training experience

Previous studies failed to find evidence for rational action selection in children under 2 years of age. The current study investigated whether younger children required more training to encode the relevant causal relationships. Children between 1½ and 3 years of age were trained over two sessions to perform actions on a touch-sensitive screen to obtain video clips as outcomes. Subsequently, a visual habituation procedure was employed to devalue one of the training outcomes. As in previous studies, 2- and 3-year-olds chose actions associated with an expected valued outcome significantly more often during a subsequent choice test. Moreover, analysis of children’s first responses in the post-devaluation test revealed evidence of rational action selection even in the youngest age group (18–23 months). Consistent with dual-process accounts of action control, the findings support the view that the ability to make rational action choices develops gradually.     

The effect of the driving activity on target detection as a function of the visibility level: Implications for road lighting

The Small Target Visibility model used in road lighting design is based on a strong simplification of the driving task. To specify the driver’s visibility needs in a way consistent with state-of-the-art lighting engineering practice, a field experiment was designed in order to investigate target detection performances, comparing driver and passenger status conditions. Sixteen target visibility levels (VL) were used. In the driver status, 34 participants had to press a button as soon as they detected the target stimulus placed on the experimental lighted section. In the passenger status, the same participants had to detect the target stimulus while the experimenter drove. The results show that the passengers’ performances (detection distance) were higher than the drivers’ performances (p = .0014). Furthermore, the higher the VL, the higher the detection distance (p < .0001). These results lead up to modify the reference scenario in order to take into account human factor components for road lighting design.     

Training career adaptability to facilitate a successful school-to-work transition

The transition from school to work is one of the most critical steps in graduates' careers, as it can determine vocational outcomes and future career success. Yet, these newcomers to the labor market often take longer than regular job seekers to find a suitable job, are more likely to experience a job mismatch and to suffer from underemployment. In this study, we proposed that career adaptability might help remedy this problem. We therefore developed a training aimed at providing graduates with career adaptability resources, with the assumption that this may foster training-participants' later career adaptability and employment quality. A longitudinal field quasi-experiment compared the development of each career adaptability dimension between a training group (n = 32) and a control group (n = 24) over three points in time (pre-training measurement, post-training measurement and follow-up measurement six months later). Repeated measures analyses showed an overall increase in concern, control and curiosity within the training group, whereas there was no increase (concern) or even an overall decrease (control and curiosity) within the control group. Consequently, the training succeeded in enhancing participants' control and curiosity in the long run. Furthermore, among participants who had found employment half a year later, training participants reported higher employment quality than did members of the control group. In sum, results show that providing graduates with career adaptability resources can raise their chances on finding a qualitatively good job.     

Body-related state shame and guilt in women: Do causal attributions mediate the influence of physical self-concept and shame and guilt proneness

Guided by the process model of self-conscious emotions, this study examined whether physical self-concept (PSC) and shame and guilt proneness were associated with body-related self-conscious emotions of state shame and guilt and if these relationships were mediated by attributions of stability, globality, and controllability. Female participants (N = 284; Mean age = 20.6 ± 1.9 years) completed measures of PSC and shame and guilt proneness before reading a hypothetical scenario. Participants completed measures of attributions and state shame and guilt in response to the scenario. Significant relationships were noted between state shame and attributions of globality and controllability, and shame proneness, guilt proneness, and PSC. Similar relationships, with the additional predictor of stability, were found for state guilt. Mediation analysis partially supported the process model hypotheses for shame. Results indicate PSC and shame proneness are important in predicting body-related emotions, but the role of specific attributions are still unclear.     

A validation study of driving errors using a driving simulator

BackgroundDriving simulators have become an important research tool in road safety. They provide a safer environment to test driving performance and have the capacity to manipulate and control situations that are not possible on-road.AimTo validate a laboratory-based driving simulator in measuring on-road driving performance by type and mean driving errors.MethodsParticipants were instructed to drive a selected route on-road. The same route was programmed in the driving simulator using the UC/Win-road software. All participants completed a background questionnaire. On-road driving behaviours of participants and driving behaviours in the simulator were assessed by an occupational therapist and two trained researchers using an assessment form. Interclass correlations were calculated to assess the inter-rater agreement between the researchers on driving behaviours. Paired t-tests were used to assess differences in driving performance between the simulator and on-road assessments.ResultsA convenience sample of 47 drivers aged 18–69 years who held a current Western Australian class C licence (passenger vehicle) were recruited into the study. The mean age was 34.80 years (SD: 13.21) with twenty-six males (55.32%) and 21 females (44.68%) completing the study. There was no statistical difference between the on-road assessment and the driving simulator for mirror checking, left, right and forward observations, speed at intersections, maintaining speed, obeying traffic lights and stop signs.ConclusionThe preliminary results provide early support for the relative validity of the driving simulator which may be used for a variety of road safety outcomes with reduced risk of harm to participants.     

Effect of instructions on EMG during the bench press in trained and untrained males

Strength and rehabilitation professionals strive to emphasize certain muscles used during an exercise and it may be possible to alter muscle recruitment strategies with varying instructions. This study aimed to determine whether resistance trained and untrained males could selectively activate the pectoralis major or triceps brachii during the bench press according to various instructions. This study included 13 trained males (21.5 ± 2.9 years old, 178.7 ± 7.0 cm, 85.7 ± 10.7 kg) and 12 untrained males (20.3 ± 1.6 years old, 178.8 ± 9.4 cm, 74.6 ± 17.3 kg). Participants performed a bench press one-repetition maximum (1-RM) test, 3 uninstructed repetitions at 80% 1-RM and two more sets of three repetitions with instructions to isolate the chest or arm muscles. Electromyography (EMG) was obtained from the pectoralis major, anterior deltoid, and the long head and short head of the triceps brachii. Maximum EMG activity normalized to 1-RM for each muscle was averaged over the three repetitions for each set and compared between the uninstructed, chest-instructed and arm-instructed conditions among the groups. The trained participants had a greater 1-RM (126.2 ± 30.6 kg) than the untrained participants (61.6 ± 14.8 kg) (P < 0.01). EMG activity was not different between the groups for any of the instructions (P > 0.05). When the group data was combined, short head of the triceps activity was significantly lower in the chest instruction (80.1 ± 19.3%) when compared to the uninstructed (85.6 ± 23.3%; P = 0.01) and arm-instructed (86.0 ± 23.2; P = 0.01) conditions. It can be concluded that instructions can affect muscle activation during the bench press, and this is not dependent on training status.     

Promoting career preparedness and intrinsic work-goal motivation: RCT intervention

We examined the role of an in-company training program aimed at enhancing employees' intrinsic work-goal motivation by increasing their career preparedness in a randomized field experimental study. The program activities were implemented using an organization-level two-trainer model with trainers from the human resources management and occupational health services. Within-organizations randomly assigned field experimental study (RCT) investigated the impact of the intervention on immediate career preparedness and both immediate and follow-up intrinsic work-goal motivation. A total of 718 eligible individuals filled in and returned the questionnaire in 17 organizations and became voluntary participants. The respondents were randomly assigned to either intervention (N = 369) or control groups (N = 349). Those in the intervention group were invited to group intervention workshops, whereas the control group received printed material covering the information content of the intervention. The participants filled in the work-goal questionnaires before intervention, after the week-long intervention and seven months later. In addition they filled in a career preparedness scale before and after the intervention. The results showed that intervention increased career preparedness which in turn was related to intrinsic work-goal motivation and increased intrinsic work-goal motivation at the follow-up.     

Improving responding to questioning using a brief retrieval training

This research examined the effect of a brief training procedure for enhancing responding to questions about witnessed events. The training was based in research on metacognition and memory, and emphasized: attending to questions, searching for multiple responses, and weighing confidence in and considering the source of responses. In the main study, adult participants viewed a video of a burglary and after a 25 min delay half received the training. All participants were then asked answerable and unanswerable questions about the video. The training resulted in fewer errors and more rejections to unanswerable questions. Analysis of response diagnosticity indicated that responses made by the trained group were more likely to be correct responses to answerable questions. A second study showed that these findings were not due to awareness of the presence of unanswerable questions. The procedure has potential as a supplement when questioning is pursued.     

Predicting adolescent pedestrians’ behavioral intentions to follow the masses in risky crossing situations

Adolescent pedestrians are a major population at risk of being killed or injured in traffic accidents, especially in developing countries. In the current study, we examined the effects of age, gender, sensation seeking, and conformity tendency on Chinese adolescent pedestrians’ intention to cross the road against a traffic signal. A sample of 510 adolescents, aged 12–19 years, completed a series of questionnaires comprising (1) a demographic questionnaire, (2) scales which measured their tendency towards social conformity and sensation seeking, and (3) a questionnaire based on the Theory of Planned Behavior (TPB), which measured their intention to cross the road in two different traffic scenarios. One scenario depicted a situation where the crossing was consistent with other pedestrians’ behavior (Conformity scenario). In the second scenario, the road crossing was inconsistent with other pedestrians (Non-conformity scenario). Along with behavioral intentions, attitudes towards the behavior, subjective norms, perceived behavioral control, anticipated affect, moral norms, and perceived risk were also assessed. In general, adolescent participants reported greater likelihood in crossing the road when other pedestrians were crossing the road as well (Conformity with the masses) and adolescents in middle school were more likely to cross than those in high school. A hierarchical regression model explained 30% of the variance in behavioral intention in the Non-conformity scenario and 40% of the variance in the Conformity scenario. For both scenarios, attitude, subjective norm, perceived behavioral control, and anticipated affect emerged as common predictors. The theoretical and practical implications for these results are discussed.     

Measuring drivers’ visual information needs during braking: A simulator study using a screen-occlusion method

It is commonly accepted that vision plays an important role in car braking, but it is unknown how people brake in the absence of visual information. In this simulator study, we measured drivers’ braking behaviour while they had to stop their car at designated positions on the road. The access to visual information was manipulated by occluding the screen at the start of half of the braking trials, while the temporal demand was manipulated by varying the time-to-arrival (TTA). Results showed that for the longer TTA values (⩾6 s), participants in the occlusion condition stopped too early and at variable positions on the road as compared to the control condition. In the occlusion condition, participants were likely to apply an intermediate brake pedal depression, whereas in the control condition participants more often applied low or high pedal depressions. The results are interpreted in light of a distance estimation test, in which we found that participants underestimated the actual distance by 70%.     

Popcorn in the cinema: Oral interference sabotages advertising effects

One important psychological mechanism of advertising is mere exposure inducing positive attitudes towards brands. Recent basic research has shown that the underlying mechanism of mere exposure for words, in turn, is the training of subvocal pronunciation, which can be obstructed by oral motor-interference. Commercials for foreign brands were shown in cinema sessions while participants either ate popcorn, chewed gum (oral interference) or consumed a single sugar cube (control). Brand choice and brand attitudes were assessed one week later. While control participants more likely spent money (Experiment 1, N = 188) and exhibited higher preference and physiological responses (Experiment 2, N = 96) for advertised than for novel brands, participants who had consumed popcorn or gum during commercials showed no advertising effects. It is concluded that advertising might be futile under ecological situations involving oral interference, such as snacking or talking, which ironically is often the case.     

The role of cultural factors and attitudes for pedestrian behaviour in an urban Turkish sample

There is a limited number of studies that examine the role of cultural factors and attitudes related to pedestrian behaviour. The aim of this study was to explore the role of cultural variables (i.e. vertical and horizontal collectivism, and individualism, as well as uncertainty avoidance) and attitudes towards pedestrian safety for reported risk-taking pedestrian behaviour in a sample of urban Turkish road users. An additional aim was to test whether the cultural factors had mediated relations to pedestrian behaviour through attitudes towards pedestrian safety. The results are based on an urban Turkish sample (n = 289, response rate = 64%) established in Izmir and Istanbul. The sample consisted of 169 females and 120 males. Their age ranged from 15 to 78 years (M = 32.00, SD = 13.89). A regression analysis showed that the cultural factors added to the explained variance of risky pedestrian behaviour above demographic and exposure-relevant control variables as well as attitudes towards pedestrian safety. Structural Equation Modeling showed that a mediated model had good fit and explained about 60% of the variance in attitudes towards pedestrian safety and 24% in pedestrian behaviour. Within this model, vertical collectivism related to lower levels of pedestrian risk-taking behaviour, while horizontal collectivism was related to higher levels of risk-taking behaviour. As expected, safe attitudes were related to lower levels of risk-taking pedestrian behaviour. The results are discussed in relation to hierarchy and authority orientations facilitated by the specific cultural factors and how such tendencies may relate to pedestrian risk-taking behaviour.     

Mechanisms underlying the self-talk–performance relationship: The effects of motivational self-talk on self-confidence and anxiety

ObjectivesThe present study examined the effects of motivational self-talk on self-confidence, anxiety, and task performance in young athletes.MethodsParticipants were 72 tennis players. The experiment was conducted in five sessions: baseline assessment, three training sessions, and final assessment. After the baseline assessment participants were divided and assigned randomly into experimental and control groups. The two groups followed the same training program with the experimental group practicing the use of self-talk. In the last session, the final assessment took place. A forehand drive test was used to evaluate task performance, and the Competitive Anxiety Inventory-2R was used to assess self-confidence and anxiety.ResultsA two-way mixed model MANOVA revealed that task performance improved for the experimental group (p < .01) and remained stable for the control group; self-confidence increased (p < .01) and cognitive anxiety decreased (p < .05) for the experimental group, whereas no changes were observed for the control group. Correlation analysis revealed that changes in task performance were moderately related to changes in self-confidence (p < .05).ConclusionsThe results of the study showed that self-talk can enhance self-confidence and reduce cognitive anxiety. Furthermore, it is suggested that increases in self-confidence can be regarded as a viable function explaining the facilitating effects of self-talk on performance.     

Variability of kinematic graphomotor fluency in adults with ADHD

Although graphomotor differences and variability of performance have been observed in children with attention deficit hyperactivity disorder (ADHD), no study has investigated whether this variability manifests in the kinematic graphomotor domain in adults with ADHD. Fourteen ADHD and 20 control participants wrote a novel grapheme and common word on a digitizing tablet 30 times each, with ADHD participants counterbalanced on and off stimulant medication. Variability of graphomotor fluency was significantly greater in ADHD versus control participants only in the novel writing task, both on, F(1, 31) = 5.988, p = .020, and off stimulant medication, F(1, 32) = 8.789, p = .006. Results suggest that motor control differences in ADHD are not limited to childhood and extend into adulthood. Given sufficient additional research, variability of kinematic graphomotor fluency may increase the sensitivity/specificity of differential diagnoses and/or represent a biomarker for ADHD.     

Driving performance while using a mobile phone: A simulation study of Greek professional drivers

PurposeThe current study aims to assess the driving performance of professional drivers while using a mobile phone.Material and methodsA sample of 50 male professional drivers participated in the study. The sample was drawn conveniently from the professional drivers’ registries and the main taxi ranks. The inclusion criteria were: (a) age above 18 years, (b) possession of a driving license, (c) sufficient reading, writing, and communicating skills, (d) informed consent prior to participation. Laboratory tests were conducted using the VS500M driving simulator manufactured by Virage Simulation Inc. The intervention involved different tasks/assignments: (a) driving without using a mobile phone (Control time), (b) driving while having a conversation on the mobile phone, (Task_1), (c) driving while reading out loud text messages (Task_2) and, (d) driving while texting (Task_3). Differences in the driving performance between the control time and the time with assignments, were examined. The participants were evaluated on the followings outcome measures: (a) variation of the steering position per second, (b) following distance per second, (c) variation of the lateral lane position per second, and (d) sum of squared acceleration per second.ResultsThe analysis indicated that “variation of the steering position per second” was significantly affected by “text-message reading” [t(50) = −5.443; p < 0.0001] and “texting” [t(50) = −5.442; p < 0.0001]. A significant main effect was observed in terms of the “following distance per second” and the “variation of the lateral lane position per second” for all the three mobile phone assignments. Lastly, the “sum of squared acceleration per second” was significantly decreased during conversation on the phone [t(50) = 2.713; p = 0.009] as well as during texting [t(50) = 3.428; p = 0.001] as compared with the control time.ConclusionsThe study is among the few existing experimental studies in a country with one of the highest road fatalities in Europe but with limited evidence on road traffic behaviour. This study could guide the design of large-scale simulation studies aiming to explore the impact of mobile phone on driving behaviour.     

Evolution of nurses’ social representations of hospital hygiene: From training to practice

Nurses’ social representations of hospital hygiene were analyzed. A cross-sectional method was used to compare and analyze the social representations of the concept domain of “hospital hygiene” across three independent groups of participants (n = 744). The groups included: (a) professional nurses (n = 114); (b) student nurses (n = 315); and (c) psychology students (n = 315). Comparisons were drawn: (a) between professionals and students; and (b) between student nurse cohorts at three different levels (years) of training. The results show an ongoing evolution of the social representations of hospital hygiene during training and in the course of professional practice. The representation of hospital hygiene is structured around the element “cleanliness” at the beginning of training and around “asepsis” at the end of training. An increased specialization of vocabulary pertaining specifically to hospital hygiene is also observed. A comparative analysis between students and professionals shows a lower number of common lexical associations in the student group. A discussion of how these results are related to other research in cognitive ergonomics and the analyses of dialogues involving professional interactions between experts and novices is provided.