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PubMed2001

Enabling occupation: the importance of an affirming environment.

Occupational therapists have become increasingly concerned with factors beyond the individual which impact occupational performance. Several recent models propose that the environment is a significant influence on occupational performance and upon its meaningfulness. An in-depth, qualitative study was conducted which explored the meaning of occupational engagement for eight women with mental illness (Rebeiro & Cook, 1999). This study yielded several important insights about the environment, which have recently been replicated by Legault and Rebeiro (2001) and Rebeiro, Day, Semeniuk, O'Brein, and Wilson (In Press). Participants suggested that environments that provide opportunity, and not prescription are more conducive to fostering occupational performance. Participants further suggested that an environment that provides Affirmation of the individual as a person of worth, a place to belong, and a place to be supported, enables occupational performance over time. A series of research studies indicated that the social environment is an important consideration in planning therapeutic interventions which aim to enable occupation. Implications for occupational therapy practice, education and research are offered.

Adult↗

PubMed2006

Becoming the Harvard man: person-environment fit, personality development, and academic success.

The continuity and change of the needs and evaluations of the college environment and person-environment fit (PE fit) with the college environment were studied in a 4-year longitudinal study of students (N = 191). Perceptions of the environment changed more dramatically than corresponding self-perceived needs. PE fit demonstrated moderate levels of consistency over the 4-year span, but no significant increases in mean levels were found over time. Antecedents to PE fit in the college environment included both intelligence and openness to experience. Outcomes associated with PE fit included changes in personality traits linked to openness to experience and higher academic achievement. The implications of the findings for personality development and the relationship of PE fit to successful outcomes are discussed.

Educational Status↗

PubMed1994

What can you do to improve the environment?

Medicine has a dual obligation concerning the environment: (1) to supply laboratory and clinical research to document harmful effects on the environment, and (2) to encourage changes in the environment to reduce or eliminate adverse health effects. This article presents individual and group actions for the improvement of the environment. The American Academy of Otolaryngology-Head and Neck Surgery has developed a medical office pledge, "The Greening of Our Office for Improvement of Our Environment." Physicians are encouraged to agree to certain principles for environmental improvement.

Community Participation↗

PubMed2006

The relations between family environment and violence exposure among youth: findings from the national survey of adolescents.

A national household probability sample of 4,023 adolescents (ages 12 to 17) completed telephone interviews assessing demographics, adverse family environment, and violence exposure. Logistic regressions examined relations among family environment and each violence exposure type, controlling for demographics and other violence exposures. Relationships between family environment and violence exposure varied, depending on type of violence reported, most notably between intrafamilial versus extrafamilial violence. After controlling for family environment, exposure to one violence type significantly increased the likelihood of other violence exposures. Family substance use and not always living with a natural parent were significantly associated with all three types of violence exposure. Findings indicate that clinical assessments should include a thorough evaluation of family environment and violence exposure and also highlight the need for treatment to focus on the adolescent and broader family unit. Future research is needed to further examine these complex interrelationships and their associations with adolescent outcomes.

Adolescent↗

PubMedDate not supplied

Effects of data structure on the estimation of covariance functions to describe genotype by environment interactions in a reaction norm model.

Covariance functions have been proposed to predict breeding values and genetic (co)variances as a function of phenotypic within herd-year averages (environmental parameters) to include genotype by environment interaction. The objective of this paper was to investigate the influence of definition of environmental parameters and non-random use of sires on expected breeding values and estimated genetic variances across environments. Breeding values were simulated as a linear function of simulated herd effects. The definition of environmental parameters hardly influenced the results. In situations with random use of sires, estimated genetic correlations between the trait expressed in different environments were 0.93, 0.93 and 0.97 while simulated at 0.89 and estimated genetic variances deviated up to 30% from the simulated values. Non random use of sires, poor genetic connectedness and small herd size had a large impact on the estimated covariance functions, expected breeding values and calculated environmental parameters. Estimated genetic correlations between a trait expressed in different environments were biased upwards and breeding values were more biased when genetic connectedness became poorer and herd composition more diverse. The best possible solution at this stage is to use environmental parameters combining large numbers of animals per herd, while losing some information on genotype by environment interaction in the data.

Analysis of Variance↗

PubMed2005

Nurse moral distress and ethical work environment.

This study examined the relationship between moral distress intensity, moral distress frequency and the ethical work environment, and explored the relationship of demographic characteristics to moral distress intensity and frequency. A group of 106 nurses from two large medical centers reported moderate levels of moral distress intensity, low levels of moral distress frequency, and a moderately positive ethical work environment. Moral distress intensity and ethical work environment were correlated with moral distress frequency. Age was negatively correlated with moral distress intensity, whereas being African American was related to higher levels of moral distress intensity. The ethical work environment predicted moral distress intensity. These results reveal a difference between moral distress intensity and frequency and the importance of the environment to moral distress intensity.

Adult↗

PubMed2004

Perceived environment and physical activity in youth.

The examination of physical environments to explain and promote physical activity is an important yet under-investigated area of research inquiry. This study explored relationships between the perceived availability of physical environmental resources and the perceived importance of these resources in relation to physical activity levels amongst youth. A self-report questionnaire was completed by 610 students (mean age = 15.5 years old; 62% female participants) from four high schools (grades 9-12) in rural Alberta, Canada. Perceived physical environment constructs explained 5% of the variance in physical activity, with home, neighborhood, and school as significant domains. Perceived importance constructs explained 8% of the variance in physical activity with school context showing the only significant relationship with physical activity. A hierarchical regression analysis entered sex, grade, self-efficacy, peer, family and physical education teacher relationships, as the first block and eight environmental constructs as the second block. The first block variables accounted for 22% of the variance and environmental constructs accounted for an added 4% of the variance in physical activity. Perceived importance of the school environment was the only environment variable significantly associated with physical activity (beta = .14; p < .05) after taking into account the impact of these traditional predictors. These findings reinforce the need to provide and support school physical environments related to physical activity.

Adolescent↗

PubMed2004

Cognitive aging and the hippocampus: how old rats represent new environments.

Spatial learning impairment in aged rats is associated with changes in hippocampal connectivity and plasticity. Several studies have explored the age-related deficit in spatial information processing by recording the location-specific activity of hippocampal neurons (place cells). However, these studies have generated disparate characterizations of place cells in aged rats as unstable (Barnes et al., 1997), resistant to change (Tanila et al., 1997b; Oler and Markus, 2000; Wilson et al., 2003), or delayed in using external cues (Rosenzweig et al., 2003). To reconcile these findings, we recorded place cells from aged and young rats as they repeatedly explored both a highly familiar environment and an initially novel environment, and we repeatedly tested whether the place fields formed in the novel environment were anchored by external cues. Initially, spatial representations in aged rats were abnormally maintained between the familiar and novel environments. Then, new representations were formed but were also delayed in becoming anchored to the external landmarks. Finally, even when the new spatial representations became bound to the landmarks, they were multi-stable across repetitive exposures to the formerly novel environment. These observations help to reconcile previously divergent characterizations of spatial representation in aged rats and suggest a model of cognitive aging and hippocampal function.

Aging↗

PubMed2005

Dormancy genes from weedy rice respond divergently to seed development environments.

Genes interacting with seed developmental environments control primary dormancy. To understand how a multigenic system evolved to adapt to the changing environments in weedy rice, we evaluated genetic components of three dormancy QTL in a synchronized nondormant genetic background. Two genetically identical populations segregating for qSD1, qSD7-1, and qSD12 were grown under greenhouse and natural conditions differing in temperature, relative humidity, and light intensity during seed development. Low temperatures tended to enhance dormancy in both conditions. However, genotypes responded to the environments divergently so that two populations displayed similar distributions for germination. Additive and/or dominance effects of the three loci explained approximately 90% of genetic variances and their epistases accounted for the remainder in each environment. The qSD1 and qSD7-1 main effects were increased, while the qSD12 additive effect was decreased by relatively low temperatures. Both gene main and epistatic effects were involved in G x E interactions, which in magnitude were greater than environmental main effect. The divergent responses of dormancy genes observed in this simple multigenic system presumably have selective advantages in natural populations adapted to changing environments and hence represent a genetic mechanism stabilizing the dormancy level of weedy rice ripened in different seasons or temperature regimes.

Chromosome Mapping↗

PubMed2006

Cumulative effects of spontaneous mutations for fitness in Caenorhabditis: role of genotype, environment and stress.

It is often assumed that the mutation rate is an evolutionarily optimized property of a taxon. The relevant mutation rate is for mutations that affect fitness, U, but the strength of selection on the mutation rate depends on the average effect of a mutation. Determination of U is complicated by the possibility that mutational effects depend on the particular environmental context in which the organism exists. It has been suggested that the effects of deleterious mutations are typically magnified in stressful environments, but most studies confound genotype with environment, so it is unclear to what extent environmental specificity of mutations is specific to a particular starting genotype. We report a study designed to separate effects of species, genotype, and environment on the degradation of fitness resulting from new mutations. Mutations accumulated for >200 generations at 20 degrees in two strains of two species of nematodes that differ in thermal sensitivity. Caenorhabditis briggsae and C. elegans have similar demography at 20 degrees, but C. elegans suffers markedly reduced fitness at 25 degrees. We find little evidence that mutational properties differ depending on environmental conditions and mutational correlations between environments are close to those expected if effects were identical in both environments.

Animals↗

PubMed1979

[Effect of proximate environment on drug susceptibility of mice (author's transl)].

The present study was performed in order to elucidate the effect of proximate environment on drug susceptibility of mice. Three experiments were carried out independently. In the first experiment, mongrel and ddS mice produced under an unsatisfactory control of proximate environment were purchased, and acute toxicity tests of thiamine hydrochloride (B1HCl) and isonicotinic acid hydrazide (INAH) were practiced at two different conditioned rooms. In the second experiment, ddY mice produced under the conventional environment controlled to a certain extent were purchased, and the toxic effect of B1HCl was examined under the similar environment. In the third experiment, the sensitivity to B1HCl of RFVL mice produced under the strict barrier system was tested at the severe air-conditioned room. LD50 and their fLD50 values were calculated by Litchfield-Wilcoxon's method, and the variance analyses were carried out. The severer the environmental control after the purchase of mice turned to the higher the drug sensitivity. This respect was more remarkable in INAH of which the toxic response is appeared slowly compared with B1HCl. Furthermore, seasonal variation was found in LD50 values. However, seasonal effect differed from rearing and experimental conditions. In the third experiment which these proximate environments were controlled severely, seasonal variation was very small. From the results of these experiments, it was defined that the use of animals produced under the satisfactory rearing condition and severe environmental control are necessary for animal experiments.

Air Conditioning↗

PubMed1995

Studies on mosquitoes (Diptera: Culicidae) and anthropic environment. 9-Synanthropy and epidemiological vector role of Aedes scapularis in south-eastern Brazil.

Behaviour comparisons of Aedes scapularis and Ae. serratus are presented. Results were obtained by sampling Aedes adult mosquitoes at several places in the rural anthropic environment in the Ribeira Valley region of S. Paulo State, Brazil. Aedes dominance was shared by those two species, but Ae. scapularis showed a clear tendency to frequent the modified environment, while Ae. serratus was to be found in the more preserved ones, here represented by the vestigial patchy forests. Regarding the open cultivated land and the dwelling environments, Ae. scapularis preponderates. Considering the regional development phases, this mosquito showed a remarkable increase in the modified environment differently from Ae. serratus that underwent a considerable decrease in migrating from the forest to the anthropic environment. As a consequence of these results it is reasonable to conclude that Ae. scapularis may be considered as an epidemiologically efficient vector and that it quite probably played this role in the Rocio encephalitis and other arbovirus epidemics.

Aedes↗

PubMed2006

Historical evolution of the concept environment proposed in the Roy Adaptation Model.

The concern for the development of concepts becomes even more important when we report to its use in Nursing theories, in which some concepts are considered central, such as person, environment, health and nursing. This study aims to discuss the historical evolution of the environment concept used in the Roy Adaptation Model. The method of analysis the study was based on is the evolutionary conceptual analysis of the concept Environment of the Roy Adaptation Model. According to the research results, Environment is introduced as the second major concept in the Roy Adaptation Model. In this theorist's interpretation of the environment, we notice her interest in surpassing the mechanistic point of view upon which the first version of the model was based. The approach of the concept of interaction between people and groups seems to represent an improvement, influenced by the current thoughts that are preeminent in nursing.

Adaptation, Psychological↗

PubMed2004

Residential environment index system and evaluation model established by subjective and objective methods.

In this research, the residential environment index system and evaluation model were established by means of subjective and objective methods. The methodology for establishing the evaluation system for residential environment was first analyzed; then the subjective evaluation data-base was established by questionnaire survey; and at the same time, the objective evaluation data-base was constructed by Geographic Information System (GIS); and then the related equation system between subjective and objective system was developed by multiple regression analysis. This research could benefit evaluation of the residential environment quality for various purposes, and also provide important rudimentary data-base for the development and improvement of residential environment for officials. Furthermore, the index system and evaluation model established in this research could construct a strong relation between subjective evaluation and objective data; and thus could provide a comprehensive, efficient and effective methodology for the evaluation of residential environment.

Consumer Behavior↗

PubMed2003

Neighborhood-based differences in physical activity: an environment scale evaluation.

OBJECTIVES: This study evaluated a neighborhood environment survey and compared the physical activity and weight status of the residents in 2 neighborhoods. METHODS: On 2 occasions, 107 adults from neighborhoods with differing "walkability" were selected to complete a survey on their neighborhood environment. Physical activity was assessed by self-report and by accelerometer; height and weight were assessed by self-report. RESULTS: Neighborhood environment characteristics had moderate to high test-retest reliabilities. Residents of high-walkability neighborhoods reported higher residential density, land use mix, street connectivity, aesthetics, and safety. They had more than 70 more minutes of physical activity and had lower obesity prevalence (adjusted for individual demographics) than did residents of low-walkability neighborhoods. CONCLUSIONS: The reliability and validity of self-reported neighborhood environment subscales were supported. Neighborhood environment was associated with physical activity and overweight prevalence.

Adult↗

PubMedDate not supplied

Effects of the living environment on activity and use of time.

Exposure to an environment with increased opportunities resulted in increased activity among a group of elderly persons, compared to similar people in unenriched environments. Findings support the hypothesis that unmet need for activity existed among the group, all of whom had been matched to the enriched environment by staff and self-selection, and the hypothesis that environmental intervention is potent in influencing behavior, even in old age. Persistence of the relative elevation in activity over eight years and concomitance with other indexes of well-being suggest that appropriate environment intervention which expands activity opportunities is beneficial. Congruity between the person's needs and the environment's resources is central. Individual differences in need for activity interacted with opportunity in accounting for outcomes.

Activities of Daily Living↗

PubMed1988

Social epidemiology and the work environment.

A major theme in virtually all of Bertil Gardell's work is that the social and work environment affects health and well-being. This concern with the social environment has been a major influence in the development of a new area of research referred to as social epidemiology. In this area of work, difficulties are increasingly being recognized in identifying specific social factors in the environment toward which intervention programs can be directed. An approach to this complex problem is to focus attention on the "mini-environment" of the workplace. Research here has yielded several interesting hypotheses that may have important implications for studies of the larger environment. These hypotheses involve the concepts of control and participation, concepts that are central to all of Gardell's work.

Employment↗

PubMed2005

Spatial- versus object-oriented architectural environments: preference and perception.

This study examined changes in perceptual response and preference a specific category of architectural environment by age groups. Understanding relationships among age, perception, and preference is important in creating more appropriate environments. The hypothesis was that individuals who score field-dependent on an Embedded Figures Test would prefer architectural environments which support spatial orientation, while individuals who are field-independent would prefer environments without information on spatial organization or an object-oriented space. It was also hypothesized that children and elderly persons would score more field-dependent and prefer spatially orienting spaces. 64 subjects ages 4 to 85 years were recruited from local schools, various organizations for seniors and adults, given the Embedded Figures Test to measure field dependence, and were compared. Their scores were compared by preference for one of the two environments. Hypotheses were not supported for the spaces overall, however, clear patterns regarding seating preference were identified. Children and seniors had significantly more field-dependent preferences.

Adolescent↗