Using data from the Canadian Longitudinal Study on Aging, in this study we provide an alternative explanation for the gap of life satisfaction between living-alone immigrants and Canadian-born older adults. Based on the Big-Five personality traits, we use the latent class analysis to generate two types of social dispositions, social independence and social dependence. With social dispositions taken into account, living alone contributes to life satisfaction in opposite ways for immigrant and Canadian-born older adults, by playing a negative role for the former group and a positive role for the latter. The trend of higher life satisfaction among the living-alone Canadian-born are mainly among the socially independent, whereas for immigrants, socially dependent older adults experience the lowest level of life satisfaction when living alone. Therefore, while socially independent Canadian-born older adults gain a \"living-alone premium\" in life satisfaction; their socially dependent immigrant counterparts experience a \"living-alone penalty\" in life satisfaction.

This cross-sectional study aimed to investigate whether athletes (ATHL) and non-athletes (NON-ATHL) individuals had similar accuracy in matching intended to actual force during ballistic (BAL) and tonic (TON) isometric contractions. In this cross-sectional study, the subjects were divided into ATHL (n = 20; 22.4 ± 2.3 yrs; 73.2 ± 15.7 kg; 1.76 ± 0.08 m) and NON-ATHL (n = 20; 24.6 ± 2.4 yrs; 68.2 ± 15.0 kg; 1.73 ± 0.1 m) groups. The isometric quadriceps strength was measured with a load cell applied to a custom-built chair. For each condition, subjects performed at first three maximal voluntary isometric contractions (MVIC) as reference. Then, subjects had to match three intended force intensities expressed in percentage of the MVIC (i.e., 25%, 50%, and 75%) without any external feedback. Subjects performed three trials for each force intensity. The accuracy (AC) was calculated as the absolute difference in percentage between the intended and the actual force. A Likert scale was administered for each trial to assess the subjective matching between the intended and the actual force. Statistical analysis showed that the ATHL group was more accurate (p < 0.001) than the NON-ATHL group. In contrast, the AC (p < 0.001) was lower when the force intensities increased independently from the group. Moreover, significantly higher AC (p < 0.001) and lower aggregate Likert scores (p < 0.001) were found in BAL than TON conditions. These results suggest that (i) sports practice could enhance muscle recruitment strategies by increasing the AC in the isometric task; (ii) differences between intended and actual force appeared to be intensity-dependent with lower AC at high force intensities; (iii) different control systems act in modulating BAL and TON contractions.

BACKGROUND: This study analyzes the relationship between measures of occupational accidents and workers\' perception of risk in the workplace using nationally representative data on workers\' characteristics and a complete record of occupational accidents.
METHODS: Regression analyzes addressing both the ordinal nature of the dependent variable and causality were conducted to control for different sociodemographic factors influencing workers\' perceptions of occupational risks. Special attention was paid to the risk level of the worker\'s workgroup, existence of family responsibilities, organizational safety culture, and measures of accident rates.
RESULTS: Individuals showed different perceptions of risk based on their personal and work characteristics. Significant associations were observed between each variable of interest and risk perception. Overall, the results remain robust across specifications addressing both simultaneity and ordinality.
CONCLUSIONS: Employees\' \"reading\" of hazards was not fully aligned with objective information on occupational accidents but depended on individual characteristics. Having family responsibilities or being unionized increased workers\' risk perception, whereas belonging to a workgroup with higher accident rates reduced it.
CONCLUSIONS: Knowing how workers perceive risk and how this perception deviates from statistical information on accidents are essential for management to accurately design safety measures. In this regard, specific characteristics such as age, having dependents in the family, or the typology of the workers\' workgroup should be taken into account. Greater knowledge of preventive measures will improve the way workers perceive risk, and ultimately contribute to reducing the likelihood of occupational accidents.

UNASSIGNED: The shifting living and working conditions have profound impacts on the residents\' mental health. However, current research in this field has not remarkable investigated.
UNASSIGNED: This study used the China Labor-force Dynamic Survey (CLDS) dataset from 2018 and relied on a regression model to examine the effects of the built environment, work environment, and subjective perception on the mental health of Chinese citizens. It also considers the circumstances of both migrants and local residents.
UNASSIGNED: This study revealed significant correlations between mental health and greening space rate, road network density, commuting time, work feelings, community trust, economic satisfaction, and other factors. Additionally, the mental health of local residents was shown to be significantly affected by community security, while it shows no significance in migrants. Furthermore, a significant spatial autocorrelation was found in terms of mental health within the central and eastern regions of China.
UNASSIGNED: The findings of this study offer valuable insights that can be used to facilitate measures aimed at improving the mental health of residents and promoting the development of healthy cities.

There is a growing recognition of the importance of subjective definitions of successful aging from a clinical and policy perspective, and for their social and cultural relevance. However, the voices of older Indians remain largely underrepresented in the emerging body of qualitative literature on successful aging. Given this gap, and India\'s burgeoning older population, the present study set out to examine their subjective perception of successful aging. Using convenience sampling, data was collected from older men and women (N = 63, M Age = 71.21) living in the community, and in old age homes in Delhi NCR, through face-to-face interviews and focus group discussions. Reflexive thematic analysis resulted in four primary themes and eight sub-themes - Successful Aging as Personal Well-being, Tensions between Agency and Fatalism, comprising three sub-themes viz. the person as an active agent, co-existence of agency and fatalism, and negotiating with the invisible powers; Linked Lives comprising two sub-themes viz. the aging parent and the adult child, and spousal interrelationship; and The Social and Built Environment comprising three sub-themes, viz. complexity of social life: the health interface, social life in the neighborhood, and the good house. These findings provide a culture-specific view of successful aging in the Indian context, and reveals the multifaceted conceptualization of successful aging of older Indians - one that encompasses various biopsychosocial components.

OBJECTIVE: To compare the plaque-removal efficacy of ultra-soft single-headed, triple-headed, and T-shaped toothbrushes and the subjective perceptions of users.
METHODS: In this randomized, single-blind, crossover study, 30 healthy adult participants were randomly divided into three groups of 10, who tested the three types of toothbrushes in differing order, with a 1-week washout period between the tests. Dental plaque scores were recorded before and after toothbrushing, and questionnaires on subjective perceptions after toothbrushing were collected.
RESULTS: The participants included 16 female participants and 14 male participants (average age: 29.4 ± 6.7 years). All three toothbrush types were effective in reducing dental plaque by 36-46%; however, the cleaning effect of the ultra-soft single-headed toothbrush was inferior to that of the triple-headed and T-shaped toothbrushes, the difference being statistically significant. The users\' subjective perceptions suggested that the ultra-soft single-headed toothbrush was significantly superior to the other two toothbrush types. Plaque scores for the lower posterior tooth surfaces were higher than those for the upper posterior tooth surfaces, particularly on the left side, for both the ultra-soft single-headed and T-shaped toothbrushes.
CONCLUSIONS: Healthcare practitioners should identify the type of toothbrush bristles used by individuals and provide appropriate oral health information.

Subjective perceptual experience is influenced not only by bottom-up sensory information and experience-based top-down processes, but also by an individual\'s current brain state. Specifically, a previous study found increased prestimulus insula and intraparietal sulcus (IPS) activity before participants perceived an illusory Gestalt (global) compared with the non-illusory (local) interpretation of a bistable stimulus. That study provided only a snapshot of the brain state that favors the illusory interpretation. In the current study, we tested whether areas that differentiate between the illusory and non-illusory perception, immediately before stimulus onset, are also associated with an individual\'s general tendency to perceive it, which remains stable over time. We examined individual differences in task-free functional connectivity of insula and IPS and related them to differences in the individuals\' duration of the two stimulus interpretations. We found stronger connectivity of the IPS with areas of the default mode and visual networks to be associated with shorter local perceptual phases, i.e. a faster switch to an illusory percept, and an opposite effect for insula connectivity with the early visual cortex. Our findings suggest an important role of IPS and insula interactions with nodes of key intrinsic networks in forming a perceptual tendency toward illusory Gestalt perception.

People\'s perceptions and understanding of the built environment can shape and regulate travel intention and behavior. From the perspective of urban design, improving the built urban environment is an important way to encourage green travel. This study determined the impact path from the built environment to subway travel behavior, considering the intermediate effect of psychological factors. The impact path could provide feedback for optimizing the built environment, thereby improving the ratio of subway travel. In this study, the impact path hypothesis of \"objective environment-subjective psychological-travel behavior\" was first proposed, taking travelers\' psychological perceptions as the intermediary variable. Second, questionnaires and geographic information were used to measure the objective environment and subjective psychological perceptions. Third, a structural equation model was constructed to verify the proposed path hypothesis. Finally, multiscale geographically weighted regression was used to analyze the influence of subjective and objective factors on travel behavior and its spatial differences. The empirical case sampled 405 residents of Zhengzhou, China. The results verified the proposed impact path hypothesis and revealed spatial heterogeneity in its impact on travel behavior. The research explains how travel behavior is generated and could support the optimization of the urban built environment.

The association between idiopathic Parkinson\'s disease, a paradigmatic dopamine-deficiency syndrome, and problems in the estimation of time has been studied experimentally for decades. I review that literature, which raises a question about whether and if dopamine deficiency relates not only to the motor slowness that is an objective and cardinal parkinsonian sign, but also to a compromised neural substrate for time perception. Why does a clinically (motorically) significant deficiency in dopamine play a role in the subjective perception of time\'s passage? After a discussion of a classical conception of basal ganglionic control of movement under the influence of dopamine, I describe recent work in healthy mice using optogenetics; the methodology visualizes dopaminergic neuronal firing in very short time intervals, then allows for correlation with motor behaviors in trained tasks. Moment-to-moment neuronal activity is both highly dynamic and variable, as assessed by photometry of genetically defined dopaminergic neurons. I use those animal data as context to review a large experimental experience in humans, spanning decades, that has examined subjective time perception mainly in Parkinson\'s disease, but also in other movement disorders. Although the human data are mixed in their findings, I argue that loss of dynamic variability in dopaminergic neuronal activity over very short intervals may be a fundamental sensory aspect in the pathophysiology of parkinsonism. An important implication is that therapeutic response in Parkinson\'s disease needs to be understood in terms of short-term alterations in dynamic neuronal firing, as has already been examined in novel ways-for example, in the study of real-time changes in neuronal network oscillations across very short time intervals. A finer analysis of a treatment\'s network effects might aid in any effort to augment clinical response to either medications or functional neurosurgical interventions in Parkinson\'s disease.

OBJECTIVE: Satisfaction with the nasal appearance is a crucial outcome parameter in functional rhinoplasty (fRPL). The visual analogue scale is a suitable instrument not only for the preoperative patient assessment, but also as a patient-reported outcome measure in fRPL. In this study, we analyzed whether a high discrepancy in the preoperative subjective perception of the nasal appearance between patients and other individuals predicts a lower level of satisfaction with the postoperative result and hence a worse outcome of fRPL.
METHODS: Standardized facial pictures of patients (n = 80) who underwent fRPL were taken preoperatively, 3 and 12 months postoperatively. In addition, patients were asked to complete the German version of the Utrecht Outcome Assessment Questionnaire in Aesthetic Rhinoplasty (D-OAR). The standardized facial pictures of the patients were presented to surgeons as well as to examiners without a medical background, and they were asked to evaluate the patients\' nasal appearance using the visual analogue scale.
RESULTS: The external evaluation of patient\'s nasal appearance was 1.7 points higher in median than the patient\'s subjective perception (range -5.7-7.00). A large discrepancy between self- and external estimation significantly correlates with higher D-OAR values (r = 0.539, p < 0.001). Patients with high scores in the D-OAR trick questions, indicating a body dysmorphic disorder, show a significant larger discrepancy between the external- and the self-assessment (2.8 ± 0.5 vs. 1.4 ± 0.3, mean ± SEM, p = 0.017).
CONCLUSIONS: Large discrepancies between the self and external assessment of the nasal appearance are associated with a high-perceived influence of the appearance of the nose on the quality of life in patients undergoing functional rhinoplasty. That might be an indicator for unrealistic expectations concerning the postoperative outcome. Knowledge about this factor helps to identify the need for intensive discussion about possibilities and limitations of the planned procedure to avoid postoperative dissatisfaction.