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1.
Nat Commun ; 15(1): 1202, 2024 Feb 20.
Artigo em Inglês | MEDLINE | ID: mdl-38378761

RESUMO

The Russian invasion of Ukraine on February 24, 2022, has had devastating effects on the Ukrainian population and the global economy, environment, and political order. However, little is known about the psychological states surrounding the outbreak of war, particularly the mental well-being of individuals outside Ukraine. Here, we present a longitudinal experience-sampling study of a convenience sample from 17 European countries (total participants = 1,341, total assessments = 44,894, countries with >100 participants = 5) that allows us to track well-being levels across countries during the weeks surrounding the outbreak of war. Our data show a significant decline in well-being on the day of the Russian invasion. Recovery over the following weeks was associated with an individual's personality but was not statistically significantly associated with their age, gender, subjective social status, and political orientation. In general, well-being was lower on days when the war was more salient on social media. Our results demonstrate the need to consider the psychological implications of the Russo-Ukrainian war next to its humanitarian, economic, and ecological consequences.


Assuntos
Surtos de Doenças , Bem-Estar Psicológico , Humanos , Ucrânia/epidemiologia , Europa (Continente)/epidemiologia , Saúde Mental
2.
Can J Aging ; 42(3): 475-484, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37272532

RESUMO

Building on the Stereotype Content Model, the present work examined the heterogeneity of the stereotypes about older people. We aimed to broaden the range of perceived predictors of competence in older people and included respect in addition to status. Seventeen subtypes were selected in a pilot study (n = 77). The main study was conducted on a French sample (n = 212) that took part in a self-reported survey. Cluster analysis showed that specific older people subtypes appear in three combinations of warmth and competence. Correlation and regression analyses showed that competition negatively predicts warmth, and that status positively predicts competence. In a substantial number of target groups, respect played a more important role than status in the perception of group competence. To sum up, this study suggests that the perceived competence of older people is not only related to perceived socio-economic status but also to the amount of respect they receive.


Assuntos
Percepção , Estereotipagem , Humanos , Idoso , Projetos Piloto , Inquéritos e Questionários , Autorrelato
4.
Biol Psychol ; 177: 108507, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36706863

RESUMO

While social neuroscience has already provided evidence for a deficit of affective empathy in racial prejudice, little is known about other less visible social categories when considered as an outgroup. We studied the process of empathy through event-related brain potentials (ERPs). We focused on the group "people with disabilities" as they are the target of a large amount of prejudice. Twenty-six participants performed a pain decision task. The mean amplitudes of N1, P2, N2-N3 and P3 components were recorded. Our results are consistent with previous work on prejudice, showing that the pain detection is modulated by group membership (with disabilities vs. without disabilities) on N2-N3, suggesting a better neural decoding of pain vs. non-pain in the without-disability condition. Critically, no effect of early sensory components (N1, P2) was found, and P3 was not moderated by disability. These findings indicate a different time course of empathic responses depending on the condition, suggesting that people with disabilities trigger specific empathic responses. Our results contribute to disentangling perceptual processes from affective empathy reactions.


Assuntos
Empatia , Racismo , Humanos , Eletroencefalografia , Potenciais Evocados/fisiologia , Encéfalo/fisiologia , Dor/psicologia
5.
Br J Educ Psychol ; 93(2): 467-481, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-36471662

RESUMO

BACKGROUND: Teachers' level of knowledge regarding autism and their attitudes towards inclusion are major levers for the successful schooling of autistic students. However, there are currently insufficient validated tools for evaluating these two concepts among teachers that are adapted to the French context and to the constraints of the classroom setting. AIMS: This study was designed to test both the validity of The Autism Knowledge Screening Scale (AKSS) and of the Autism Attitude Scale for Teachers (AAST) among French teachers. SAMPLE: Our final sample consisted of 307 French teachers (50.5% primary school teachers and 49.5% secondary school teachers). METHODS: First, confirmatory factor analyses were conducted to test the two initial factor structures and an exploratory factor analysis was conducted regarding the AKSS. Second, criterion validity was assessed for each of the two scales. RESULTS: Concerning knowledge of autism, a two-factor model (8 items) explaining 53% of the variance was observed. The first factor represented knowledge about aetiology and the second represented knowledge about symptoms. Concerning attitudes towards autism, a one-factor model (14 items) exhibited good model fit (χ2 /df = 1.71, RMSEA = .048, AGFI = .979, SRMR = .068, CFI = .987, NNFI = .984). As expected, participants who were specialized teachers, had training, and a high degree of contact with autism had more knowledge (regarding aetiology but not regarding symptoms) and more positive attitudes. CONCLUSIONS: This study validated two quick-to-use tools for making an initial diagnosis of teachers' knowledge and attitudes regarding the school inclusion of autistic children. The use of these tools could help to fine-tune the content of training programs for teachers and test their efficacy, particularly in France where the inclusion of autistic children is still far from international standards.


Assuntos
Transtorno Autístico , Humanos , Criança , Atitude , Instituições Acadêmicas , Estudantes , Escolaridade , Professores Escolares
6.
Front Psychiatry ; 14: 1281428, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38260795

RESUMO

Introduction: Exposure to public stigma can lead to the internalization of autism-related stigma (i.e., self-stigma), associated with negative health, occupational and social outcomes. Importantly, self-stigma is linked to shame and social isolation. Although elevated self-stigma has been reported in autistic adults, to the best of our knowledge, interventions designed to target this issue are lacking. Compassion is an effective way to reduce the emotional correlates of self-stigma (i.e., shame) and their impacts on mental health. However, no study has investigated whether compassion focused therapy (CFT) can effectively reduce self-stigma in autistic adults. The present study aims at investigating whether and how self-compassion improvement following CFT may reduce self-stigma and shame in an autistic individual. Methods: A single case pre-experimental design (SCED) was used with weekly repeated measures during four phases: (i) pure baseline without any intervention (A), (ii) case conceptualization (A'), (iii) intervention (B) where CFT was delivered, (iv) follow-up without intervention (FU). The participant is a 46-year-old autistic man with high self-stigma and shame. Self-report measures of self-compassion and self-stigma and a daily idiographic measure of shame were used. Results: There was a large increase in self-compassion between pure baseline (A) and the intervention phase (A'B) (Tau-U = 0.99), maintained at follow-up. Similarly, there was a moderate decrease of self-stigma (Tau-U = 0.32). In contrast, when we compared the whole baseline phase AA' (i.e., considering the conceptualisation phase as baseline) to the intervention (B), there was no change in self-stigma (Tau-U = -0.09). There was no change in self-stigma between the intervention (B) and follow-up (Tau-U = -0.19). There was a moderate decrease in daily shame reports between the baseline (AA') and the intervention (B) (Tau-U = 0.31) and a moderate decrease between the pure baseline (A) and intervention phase (A'B) (Tau-U = 0.51). Conclusion: CFT was feasible for this autistic client and our results show that CFT led to the improvement of self-compassion. Changes on self-stigma measures were moderate. Self-stigma may need more time to change. Because self-stigma is involved in poorer social functioning and mental health in autistic adults, our results are promising and suggesting conducting more large-scale studies on CFT in autistic adults.

7.
Sci Rep ; 12(1): 21277, 2022 12 08.
Artigo em Inglês | MEDLINE | ID: mdl-36481750

RESUMO

It is crucial to understand why people comply with measures to contain viruses and their effects during pandemics. We provide evidence from 35 countries (Ntotal = 12,553) from 6 continents during the COVID-19 pandemic (between 2021 and 2022) obtained via cross-sectional surveys that the social perception of key protagonists on two basic dimensions-warmth and competence-plays a crucial role in shaping pandemic-related behaviors. Firstly, when asked in an open question format, heads of state, physicians, and protest movements were universally identified as key protagonists across countries. Secondly, multiple-group confirmatory factor analyses revealed that warmth and competence perceptions of these and other protagonists differed significantly within and between countries. Thirdly, internal meta-analyses showed that warmth and competence perceptions of heads of state, physicians, and protest movements were associated with support and opposition intentions, containment and prevention behaviors, as well as vaccination uptake. Our results have important implications for designing effective interventions to motivate desirable health outcomes and coping with future health crises and other global challenges.


Assuntos
COVID-19 , Humanos , COVID-19/epidemiologia , COVID-19/prevenção & controle , Estudos Transversais , Pandemias/prevenção & controle
8.
Soins Pediatr Pueric ; 43(326): 39-42, 2022.
Artigo em Francês | MEDLINE | ID: mdl-35902151

RESUMO

Medical comics are a suitable educational tool for paediatric populations. The emotions conveyed by the characters should not evoke negative feelings, which could then be associated with care or caregivers. The eyes and mouth are the first areas of the face to be analysed. One study attempted to assess the ability of children to perceive the emotions of one of the protagonists through the representation of their mouth.


Assuntos
Emoções , Boca , Criança , Emoções/fisiologia , Humanos , Percepção
9.
Dyslexia ; 28(3): 309-324, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35623893

RESUMO

Self-judgement is known to play a crucial role in academic achievement, and as such, may be expected to have an impact on students with dyslexia. Their self-judgements may reflect the negative stereotype of low competence that targets people with disabilities. Their repeated academic failures may lead to a negative association between "school" and "failure". The aim of the present study was to investigate how such factors contribute to academic failure in students with dyslexia. Participants were 183 French middle school students. We assessed students' self-judgement and manipulated the framing of performance tasks so that students completed literacy tasks in both academic and non-academic forms. We expected a detrimental impact of dyslexia on performance in academic but not in non-academic tasks. We also expected self-judgement to account for this difference. Students with dyslexia perceive themselves as less competent than students without dyslexia. Significantly, structural equation modeling revealed that students with dyslexia performed poorly in academic tasks, compared to students without dyslexia. This difference no longer appeared in non-academic tasks. Self-judgement of competence is a predictor of the performance of students with and without dyslexia at school and their impact is related to how the academic features of the tasks are emphasized.


Assuntos
Sucesso Acadêmico , Dislexia , Logro , Criança , Dislexia/complicações , Humanos , Instituições Acadêmicas , Estudantes
10.
Pediatr Rheumatol Online J ; 19(1): 53, 2021 Apr 14.
Artigo em Inglês | MEDLINE | ID: mdl-33853628

RESUMO

BACKGROUND: The involvement of the central nervous system is not rare in rheumatoid diseases. Even though children with juvenile idiopathic arthritis (JIA) may face academic difficulties until adulthood, very few studies have evaluated potential cognitive disorders in these patients. The present research aims to thoroughly investigate the cognitive and neuropsychological functioning of these patients. METHODS: We measured the cognitive profile of JIA patients via their neuropsychological profile, implicit memory and social cognition skills, and estimated their academic performance using reading and mathematics tests. We recruited 21 children with JIA aged 6 to 17 years-old (M = 11.01, SD = 3.30) and 21 healthy children matched in age, gender, academic level (same school class) and socioeconomic status. RESULTS: Our results showed that the cognitive profile and estimated academic ability of JIA patients are similar to those of their peers. These results support the hypothesis that children with JIA have the same cognitive predispositions to succeed at school as any other pupil. CONCLUSION: Comparing our results with the existing literature, we propose complementary hypotheses for further research. Longitudinal studies seem to be necessary to understand the psychosocial and cognitive processes involved in the development of children with JIA.


Assuntos
Artrite Juvenil/psicologia , Adolescente , Criança , Feminino , Humanos , Masculino , Testes Neuropsicológicos
11.
Autism ; 25(6): 1666-1681, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-33779325

RESUMO

LAY ABSTRACT: Research has shown that negative attitudes toward a different child can appear very early in development. Unfortunately, these negative attitudes are one of the most important barriers to the school inclusion of children with autism. Despite the increasing amount of research, no tool reliably measures these attitudes among young students. The objective of this study was to develop and validate a questionnaire (Children's Attitudes Toward Autism Questionnaire) to evaluate attitudes of students in elementary school toward their peers with autism. Elementary school students (N = 204) completed the Children's Attitudes Toward Autism Questionnaire and two other scales assessing behavioral intentions toward peers with a mental disability (Shared Activities Questionnaire-B) and familiarity with disability and autism. Results first showed that the Children's Attitudes Toward Autism Questionnaire reliably measured the concept of attitude through three sub-dimensions (namely, the cognitive, affective, and behavioral dimensions). Second, analyses confirmed that the Children's Attitudes Toward Autism Questionnaire corresponds with previous knowledge on this topic, namely, that attitudes were more positive in girls, older children, and children familiar with disability. In conclusion, the Children's Attitudes Toward Autism Questionnaire is the first scale (1) to assess all the dimensions of attitudes toward autism among elementary school children (from the age of 6 years old) and (2) to show theoretical and statistical relevance. From now on, the Children's Attitudes Toward Autism Questionnaire can be used to assess attitudes of young children toward their peers with autism. This is an important step forward, in particular for evaluating the effects of anti-stigma programs that are increasingly implemented in schools.


Assuntos
Transtorno do Espectro Autista , Transtorno Autístico , Adolescente , Atitude , Transtorno Autístico/diagnóstico , Criança , Pré-Escolar , Feminino , Humanos , Instituições Acadêmicas , Inquéritos e Questionários
12.
J Soc Psychol ; 159(1): 30-45, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-29461926

RESUMO

Building on the two fundamental dimensions of social judgment distinguishing communion from agency, the purpose of the present work was to show that the strength of the relationship between social status and agency depends on specific components at issue: assertiveness, competence, and effort. Four experimental studies were conducted using two complementary paradigms. In Studies 1 and 2, we manipulated social status, and participants had to rate the target on competence, assertiveness, and effort. In Studies 3 and 4, we reversed the design. Results consistently showed that social status was primarily related to assertiveness, somewhat related to competence, and only slightly related to effort. The present research provides a better understanding of how the dimensions of social judgment are used to explain differences in social status.


Assuntos
Personalidade , Classe Social , Percepção Social , Adolescente , Adulto , Idoso , Assertividade , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
13.
Percept Mot Skills ; 114(2): 397-406, 2012 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-22755444

RESUMO

In three experimental studies, the effects of priming participants with the disability stereotype were investigated with respect to their subsequent motor performance. Also explored were effects of activating two similar stereotypes, persons with a disability and elderly people. In Study 1, participants were primed with the disability stereotype versus with a neutral prime, and then asked to perform on a motor coordination task. In Studies 2 and 3, a third condition was introduced: priming participants with the elderly stereotype. Results indicated that priming participants with the disability stereotype altered their motor performance: they showed decreased manual dexterity and performed slower than the non-primed participants. Priming with the elderly stereotype decreased only performance speed. These findings underline that prime-to-behavior effects may depend on activation of specific stereotype content.


Assuntos
Desempenho Psicomotor/fisiologia , Percepção Social , Estereotipagem , Adolescente , Adulto , Envelhecimento , Condicionamento Psicológico/fisiologia , Pessoas com Deficiência , Feminino , Humanos , Masculino , Testes Neuropsicológicos , Inquéritos e Questionários , Adulto Jovem
14.
Br J Soc Psychol ; 51(4): 732-40, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22303819

RESUMO

The present research aimed to show that the mixed stereotype content of persons with disability observed at an explicit level does not manifest itself using implicit measures. Two experimental studies were conducted to analyse the stereotype content of persons with a disability at the implicit level. The procedure used in this study was the concept priming paradigm. Furthermore, Study 2 also included an explicit measure. Results show important discrepancies between implicit and explicit measures. At an explicit level, previous work supporting the mixed stereotype content of persons with disability was replicated: participants judged these persons as warmer but less competent than persons without a disability. At an implicit level, a quite different pattern of results emerged: persons with a disability were associated not only with less competence than persons without disability, but also with less warmth. These findings suggest that the mixed pattern between warmth and competence generally observed at an explicit level may be based on societal pressures against prejudice and discrimination.


Assuntos
Pessoas com Deficiência/psicologia , Preconceito/psicologia , Estereotipagem , Análise de Variância , Atitude Frente a Saúde , Feminino , Humanos , Masculino , Projetos Piloto , Desejabilidade Social , Adulto Jovem
15.
Sleep Med ; 13(1): 29-35, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22177345

RESUMO

BACKGROUND: Respiratory events during sleep usually lead to micro arousals resulting in consecutive daytime sleepiness even in healthy snorers. The present study investigated the evolution of subjective and objective daytime sleepiness and reaction time in healthy snorers submitted to acute and chronic sleep deprivation. METHODS: Objective sleepiness was measured by the MSLT, subjective sleepiness by the Karolinska Sleepiness Scale (KSS), and reaction time (RT) by the Psychomotor Vigilance Test. Mean sleep latencies, KSS scores and performance were analyzed through repeated measures ANOVAs with one between-factor (snorers and non-snorers) and two within-factors (sleep deprivation [baseline, acute, and chronic sleep deprivation] and time-of-day). RESULTS: The findings reveal that sleep deprivation does not enhance snoring but that, during baseline, objective daytime sleepiness is higher in snorers than in non-snorers (shorter sleep latencies) with no difference in subjective assessments. The effects of acute and chronic sleep deprivation on sleep are similar in both groups, but, after acute sleep deprivation, RT and attentional lapses (RT >500 ms) are higher in snorers. Chronic sleep deprivation produces similar results in both groups. CONCLUSION: These results suggest that respiratory efforts may be involved in the increased vulnerability to sleep deprivation of healthy snorers when compared to non-snorers.


Assuntos
Atenção/fisiologia , Desempenho Psicomotor/fisiologia , Privação do Sono/psicologia , Ronco/psicologia , Adulto , Nível de Alerta/fisiologia , Estudos de Casos e Controles , Cognição/fisiologia , Humanos , Masculino , Polissonografia , Tempo de Reação/fisiologia , Privação do Sono/fisiopatologia , Ronco/fisiopatologia , Adulto Jovem
16.
Environ Int ; 36(7): 683-9, 2010 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-20569986

RESUMO

Very few studies were devoted to permanent effects of nocturnal railway noise on sleep and cardiovascular reactivity. We investigated the effects of nocturnal railway noise on sleep and cardiovascular response in young and middle-aged adults living for many years either near a railway track or in a quiet area. Forty subjects (50% males) divided into two age groups (juniors: 26.2+/-3.6 and seniors: 56.2+/-4.2) participated in this experiment. Half of them lived near a railway track (RW group: 2.6 to 19 years) and the other half in a quiet environment (QE group: 8.1 to 14.2 years). After an adaptation night, all subjects underwent two nights in the laboratory: one control night and one noisy night (30 by-passes of a freight train). Sleep and cardiovascular modifications were assessed in response to noise. Sleep fragmentation indices were lower in RW subjects compared to QE whatever their age. In response to noise, there was a higher cardiovascular response rate to noise in RW juniors and a lower cardiovascular response rate in RW seniors compared to their age-paired QE counterparts. In conclusion, permanent exposure to nocturnal railway noise leads to decreased sleep fragmentation and to cardiovascular habituation. It is suggested that during the initial period experienced by residents living near railway tracks, nocturnal railway noise could induce a sensitization process on the autonomic response to noise reflecting a startle/defense reflex due to its functional significance, which progressively turns to habituation in the long-term if no adverse effect is experienced.


Assuntos
Exposição Ambiental/análise , Monitoramento Ambiental , Frequência Cardíaca/fisiologia , Ruído dos Transportes/estatística & dados numéricos , Ferrovias , Privação do Sono/epidemiologia , Adulto , Fatores Etários , Exposição Ambiental/estatística & dados numéricos , Monitoramento Epidemiológico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Características de Residência , Tempo , Adulto Jovem
17.
Eur J Appl Physiol ; 108(4): 671-80, 2010 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19902241

RESUMO

The aim of this study was to investigate the effects of nocturnal railway noise on cardiovascular reactivity in young (25.8 +/- 2.6 years) and middle-aged (52.2 +/- 2.5 years) adults during sleep. Thirty-eight subjects slept three nights in the laboratory at 1-week interval. They were exposed to 48 randomized pass-bys of Freight, Passenger and Automotive trains either at an 8-h equivalent sound level of 40 dBA (Moderate) and 50 dBA (High) or at a silent Control night. Heart rate response (HRR), heart response amplitude (HRA), heart response latency (HRL) and finger pulse response (FPR), finger pulse amplitude (FPA) and finger pulse latency (FPL) were recorded to measure cardiovascular reactivity after each noise onset and for time-matched pseudo-noises in the control condition. Results show that Freight trains produced the highest cardiac response (increased HRR, HRA and HRL) compared to Passenger and Automotive. But the vascular response was similar whatever the type of train. Juniors exhibited an increased HRR and HRA as compared to seniors, but there was no age difference on vasoconstriction, except a shorter FPL in seniors. Noise level produced dose-dependent effects on all the cardiovascular indices. Sleep stage at noise occurrence was ineffective for cardiac response, but FPA was reduced when noise occurred during REM sleep. In conclusion, our study is in favor of an important impact of nocturnal railway noise on the cardiovascular system of sleeping subjects. In the limit of the samples studied, Freight trains are the most harmful, probably more because of their special length (duration) than because of their speed (rise time).


Assuntos
Fenômenos Fisiológicos Cardiovasculares , Ruído dos Transportes , Ferrovias , Sono/fisiologia , Adulto , Fatores Etários , Feminino , Frequência Cardíaca/fisiologia , Humanos , Masculino , Pessoa de Meia-Idade , Ruído dos Transportes/efeitos adversos , Polissonografia , Vasoconstrição/fisiologia , Adulto Jovem
18.
Rehabil Psychol ; 54(1): 76-82, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19618706

RESUMO

PURPOSE: Most of the literature in social psychology on social categorization reveals the primacy of gender and ethnicity in person perception. The purpose of the current research was to examine the salience of visible disability (person in a wheelchair) compared with the salience of gender and ethnicity. METHOD: In two experiments, the authors compared descriptions of targets with or without disability (in a wheelchair or on a bike), female or male (Experiments 1 and 2), Black or White (Experiment 2). RESULTS: Results supported the hypothesized salience of disability: Targets with disability are immediately described by disability, independent of gender and ethnicity, whereas targets without disability are primarily identified by gender and ethnicity. CONCLUSIONS: These results suggest that disability can be considered a superordinate social category.


Assuntos
População Negra/psicologia , Avaliação da Deficiência , Pessoas com Deficiência/psicologia , Pessoas com Deficiência/reabilitação , Percepção Social , Cadeiras de Rodas/psicologia , População Branca/psicologia , Atenção , Feminino , Humanos , Masculino , Fatores Sexuais , Estereotipagem , Estudantes/psicologia , Adulto Jovem
19.
Int J Occup Saf Ergon ; 14(4): 387-94, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-19080043

RESUMO

The study was conducted to analyse possible interactions between noise and shift work, and fatigue as a function of age. In a large questionnaire survey, we assessed personal and environmental risk factors related to fatigue. Noise exposure at work (L(Aeq, 8hr)) was measured with personal noise dosimetry. The sample included 254 day and shift workers, and was divided into 2 age groups (<40- and >40-year-olds). Noise exposure had a main effect on fatigue. The highest noise exposure resulted in an increase in the fatigue level of older shift workers. The quantity of sleep mainly depended on the type of shift and age. Our data suggest that the most important factor generating fatigue could be related to industrial noise exposure, a factor which seems to aggravate work-related fatigue generated in a synergic manner by shift work and ageing. Senior workers should be prevented from cumulating those occupational stressors.


Assuntos
Fadiga/etiologia , Ruído Ocupacional/efeitos adversos , Tolerância ao Trabalho Programado/fisiologia , Adulto , Fatores Etários , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários , Adulto Jovem
20.
Int J Psychophysiol ; 70(3): 184-91, 2008 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-18773929

RESUMO

Due to undisputable effects of noise on sleep structure, especially in terms of sleep fragmentation, the expected development of railway transportation in the next few years might represent a potential risk factor for people living alongside the rail tracks. The aim of this study was to compare the effects of different types of train (freight, automotive, passenger) on arousal from sleep and to determine any differential impact as a function of sound level and age. Twenty young (16 women, 4 men; 25.8 years+/-2.6) and 18 middle-aged (15 women, 3 men; 52.2 years+/-2.5) healthy subjects participated in three whole-night polysomnographic recordings including one control night (35 dBA), and two noisy nights with equivalent noise levels of 40 or 50 dB(A), respectively. Arousal responsiveness increased with sound level. It was the highest in S2 and the lowest in REM sleep. Micro-arousals (3-10 s) occurred at a rate of 25-30%, irrespective of the type of train. Awakenings (>10 s) were produced more frequently by freight train than by automotive and passenger trains. Normal age-related changes in sleep were observed, but they were not aggravated by railway noise, thus questioning whether older persons are less sensitive to noise during sleep. These evidences led to the conclusion that microscopic detection of sleep fragmentation may provide advantageous information on sleep disturbances caused by environmental noises.


Assuntos
Nível de Alerta/fisiologia , Ruído dos Transportes/efeitos adversos , Distúrbios do Início e da Manutenção do Sono/etiologia , Fases do Sono/fisiologia , Adulto , Fatores Etários , Análise de Variância , Fadiga/etiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Tempo de Reação/fisiologia , Distúrbios do Início e da Manutenção do Sono/complicações , Distúrbios do Início e da Manutenção do Sono/psicologia , Adulto Jovem
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