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Results for “Utility Theory”

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PubMed2000

Coping through emotional approach: scale construction and validation.

Four studies demonstrate the psychometric adequacy and validity of scales designed to assess coping through emotional approach. In separate undergraduate samples, exploratory and confirmatory factor analyses of dispositional (Study 1) and situational (Study 3) coping item sets yielded 2 distinct emotional approach coping factors: emotional processing (i.e., active attempts to acknowledge and understand emotions) and emotional expression. The 2 scales yielded high internal consistency and test-retest reliability, as well as convergent and discriminant validity. A study (Study 2) of young adults and their parents established the scales' interjudge reliabilities. Longitudinal (Study 3) and experimental (Study 4) research supported the predictive validity of the emotional approach coping scales with regard to adjustment to stressful encounters. Findings highlight the utility of functionalist theories of emotion as applied to coping theory.

Adaptation, Psychological↗

PubMed1999

Treatment and generalization of complex sentence production in agrammatism.

The present study applies single-subject experimental design to examine (a) the acquisition and generalization of complex sentence production in agrammatism using Linguistic Specific Treatment (LST) and (b) the utility of syntactic theory in guiding hypotheses of treatment effects. LST trains construction and production of complex sentence structures. Four sentence types were selected for study: object clefts and object-extracted matrix and embedded questions (which are noncanonical with wh-movement), and embedded actives (which are canonical with no overt movement). All sentences contain overt material in the complementizer phrase (CP) of the syntactic tree. Three of five participants (1, 2, and 3) demonstrated generalization from object cleft treatment to production of matrix questions. Thus, LST was effective in improving their ability to generate less complex sentences with wh-movement. Once production of object clefts and matrix questions was acquired, all 5 participants demonstrated generalization from treatment to improved production of embedded questions and/or embedded actives. This generalization involved improved ability to generate embedded clausal structure to form complex sentences but continuing inability to express overt material in CP. Finally, direct treatment for embedded questions did not result in accurate production of embedded actives or vice versa. There were no trends across participants toward improved production of morphosyntactic behaviors in narrative. Persons 1, 2, and 3 showed generalization to increased informativeness and efficiency of expression and were judged by independent listeners to improve in content, coherence, and fluency of spontaneous production. The remaining two participants showed no change or a decline in performance in narrative language production (4 and 5, respectively). These participants demonstrated more severe Broca's aphasia at pretesting compared to Persons 1, 2, and 3, with greater impairments in auditory comprehension, naming, and reading. Etiology and size of lesion did not appear to account for the different behavioral patterns. This study supports the use of LST, which applies syntactic theory to predict patterns of generalization, as an effective treatment approach.

Adult↗

PubMed2000

Attachment in adult daughters of alcoholic fathers.

AIM: This study was designed to explore the utility of attachment theory for explaining socio-emotional outcomes in adult daughters of alcoholic fathers (ADAF). It was hypothesized that ADAF would have more insecure attachment organizations than daughters of non-alcoholic parents (non-ADAF), and that ADAF would describe themselves as more disposed towards compulsive care-giving than non-ADAF. DESIGN: ADAF and a matched group of non-ADAF were compared on measures of attachment security and compulsive care-giving. PARTICIPANTS: From a larger sample of 251 female college students, 26 ADAF and a matched group of non-ADAF were identified to participate in the study. SETTING: A large, urban university in the northeastern US. MEASUREMENTS: Participants completed the Adult Attachment Interview and a questionnaire assessing characteristics of compulsive care-giving. FINDINGS: As predicted, ADAF had less secure attachment organizations then did non-ADAF. Although no group differences were observed for compulsive care-giving scores, compulsive care-giving was negatively correlated with attachment security for ADAF. CONCLUSIONS: Findings indicate that the concept of attachment may be useful for understanding the developmental consequences of parenting in alcoholic families.

Adolescent↗

PubMed2003

Unfulfilled expectations and negative interactions: nonsupport in the relationships of women caregivers.

BACKGROUND: Most research has viewed social support as unconditionally positive, but negative interactions such as conflict and dissatisfaction with support are present in caregivers' relationships and have a negative impact on their health. PURPOSE: The purpose of this study was to describe women's experience of nonsupport and identify the types of nonsupport present in their relationships with family and friends while caring for a family member with dementia. ETHICS: The study received ethical clearance from the university ethics review committee. METHODS: The theoretical perspective of symbolic interaction guided this longitudinal qualitative research. Included in the study were 25 in-depth interviews with a group of eight women selected from a larger study of family caregiving because they described nonsupport in their relationships with family and friends. FINDINGS: The women experienced two types of problems in realizing support. Unmet expectations for support was the most pervasive difficulty and included unfulfilled or missing offers of assistance, unmet expectations for social interaction, mismatched aid, or incompetence on the part of the potential helper. Negative interactions, particularly with kin, took several forms: disparaging comments that belittled a caregiver's experience, conflict between the caregiver and others in their appraisal of the care recipient's health status, criticism of the caregiver's decisions in caring for the care recipient, and spillover from longstanding conflict and issues in the family history. LIMITATIONS: This study was limited to women caring for an adult relative with dementia and included a relatively homogeneous sample of English speaking, North American women of European descent. CONCLUSIONS: This study highlighted the utility of identity theory to explain the impact of unmet expectations for support and recognized disparaging comments as a form of nonsupportive interactions.

Aged↗

PubMedDate not supplied

Feria de Salud: implementation and evaluation of a communitywide health fair.

Evaluating the effectiveness of community interventions is a major responsibility for community health nurses (CHNs). Without evidence of the effectiveness of interventions, their impact on the health status of populations or communities cannot be determined. This article presents the planning, implementation, and evaluation processes of a communitywide health fair. This fair was held in a suburban community of approximately 12,000 individuals, located 20 kilometers outside of Mexico City. The health fair was one component of a collaborative project aimed at addressing the overall health needs of the community. Emphasis is on the development and utilization of measurable objectives in evaluating both processes and outcomes of the health fair. Green and Kreuter's (1991) PRECEDE-PROCEED program planning model provided direction for program planning and evaluation. The findings of process, impact, and outcome evaluation are described, providing both qualitative and quantitative measures of program effectiveness. These findings provide direction for program replication and modification. Recommendations address the utility of theory-based assessment, program planning, and evaluation, the importance of formative evaluation, and the need for cultural sensitivity in community health program planning.

Adolescent↗

PubMed2004

Calculation of the A term of magnetic circular dichroism based on time dependent-density functional theory I. Formulation and implementation.

A procedure for calculating the A term and the A/D ratio of magnetic circular dichroism (MCD) within time-dependent density functional theory (TD-DFT) is described. Utilizing an implementation of the MCD theory within the Amsterdam Density Functional program, the A term contributions to the MCD spectra of MnO(4) (-), CrO(4) (2-), VO(4) (3-), MoO(4) (2-), VO(4) (3-), MoS(4) (2-), Se(4) (2+), Te(4) (2+), Fe(CN)(6) (4-), Ni(CN)(4) (2-), trichlorobenzene, hexachlorobenzene, tribromobenzene, and hexabromobenzene are calculated. For the most part, agreement between theory and experiment for A/D ratios and the relative magnitude of A terms is found to be good, leading to simulated spectra that are similar in appearance to those derived from measurements. The A terms are found to be too small whenever comparison with experiment was possible, probably due to the neglect of environment effects on the incident radiation and the relative low accuracy of dipole strengths calculated within TD-DFT.

Journal Article↗

PubMed2004

Reactivity of C10H7+ and C10D7+ with H2 AND D2.

We have investigated, both theoretically and experimentally, the reactions of naphthylium C10H7+ and d-naphthylium C10D7+ ions with H2 and D2. Cross sections as functions of the collision energy have been measured for a variety of reaction channels. Theoretical calculations have been carried out at the density functional theory level which utilizes the hybrid functional B3LYP and the split-valence 6-31G* basis set. The key features of the potential energy surfaces and the relevant thermochemical parameters have been calculated and they provide insights on the reaction mechanisms. The bimolecular reactivity of C10H7+ with H2 is dominated by the production of naphthalene cation C10H8+. The reaction is not a direct atom-abstraction process, but instead it proceeds via the formation of a stable intermediate complex C10H9+ of sigma type geometry, with a significant mobility of hydrogen along the ring. This mobility allows the scrambling of the hydrogen atoms and causes the successive statistical fragmentation of the complex into a variety of product channels. Elimination of one H(D) atom appears to be favored over elimination of one H2 or HD molecule. Alternatively, the intermediate complex can be stabilized either by collision with a third body or by emission of a photon.

Journal Article↗

PubMed2005

A theoretical discussion of the impact of stigma on psychological adjustment to having a sexually transmissible infection.

This paper provides a discussion of the utility of stigma theory as a conceptual framework for the interpretation and analysis of the psychological impact of contracting a sexually transmissible infection (STI). Most particularly, it focuses on those viral infections that cannot be medically cured, such as genital herpes and genital human papilloma virus. Recent research in the area of STIs suggests that the stigma associated with these conditions can hinder psychosocial and sexual adjustment post-diagnosis, and provides support for the use of stigma theory as a conceptual framework with which to analyse these experiences. This paper defines the concept of stigma and presents a theoretical overview of the process of stigmatisation. Three dimensions of stigma relevant to the experience of having a STI are then presented: the degree of concealability of the condition including the social consequences of concealing a condition; the origin of the condition; and the degree of peril presented by the condition. An overview of the way in which the presence of a stigmatising condition such as a STI may affect a person's feelings of self and his/her intimate relationships is then presented. Finally, the implications of stigma theory as a conceptual framework for guiding future research in the area of personal and interpersonal reactions to STIs is discussed.

Adaptation, Psychological↗

PubMed1997

A demographic approach to selection.

The concepts of demography provide a means of combining the ecological approach to population growth with the genetical approach to natural selection. We have utilized the demographic theory of natural selection developed by Norton and Charlesworth to analyze life history schedules of births and deaths for populations of genotypes in Drosophila pseudoobscura. Our populations illustrate a stable genetic equilibrium, an unstable genetic equilibrium, and a case of no equilibrium. We have estimated population growth rates and Darwinian fitnesses of the genotypes and have explored the role of population growth in determining natural selection. The age-specific rates of births and deaths provide insights into components of selection. Both viability and fertility are important components in our populations.

Animals↗

PubMed1997

A fuzzy linguistic model for the prediction of carpal tunnel syndrome risks in an occupational environment.

This research presents the development and evaluation of a fuzzy linguistic model designated to predict the risk of carpal tunnel syndrome (CTS) in an occupational setting. CTS has become one of the largest problems facing ergonomists and the medical community because it is developing in epidemic proportions within the occupational environment. In addition, practitioners are interested in identifying accurate methods for evaluating the risk of CTS in an occupational setting. It is hypothesized that many factors impact an individual's likelihood of developing CTS and the eventual development of CTS. This disparity in the occurrence of CTS for workers with similar backgrounds and work activities has confused researchers and has been a stumbling block in the development of a model for widespread use in evaluating the development of CTS. Thus this research is an attempt to develop a method that can be used to predict the likelihood of CTS risk in a variety of environments. The intent is that this model will be applied eventually in an occupational setting, thus model development was focused on a method that provided a usable interface and the desired system inputs can also be obtained without the benefit of a medical practitioner. The methodology involves knowledge acquisition to identify and categorize a holistic set of risk factors that include task-related, personal, and organizational categories. The determination of relative factor importance was accomplished using analytic hierarchy processing (AHP) analysis. Finally a mathematical representation of the CTS risk was accomplished by utilizing fuzzy set theory in order to quantify linguistic input parameters. An evaluation of the model including determination of sensitivity and specificity is conducted and the results of the model indicate that the results are fairly accurate and this method has the potential for widespread use. A significant aspect of this research is the comparison of this technique to other methods for assessing presence of CTS. The results of this evaluation technique are compared with more traditional methods for assessing the presence of CTS.

Adult↗

PubMed1993

The treatment of addiction in group psychotherapy.

This article gives specific reasons and evidence why group psychotherapy is the treatment of choice for addictions. Utilizing object relations theory and the self-psychology of Kohut, the authors present a model of group psychotherapy that combines these perspectives with those of Yalom's interactional group psychotherapy. Agreeing with Kohut and other object relation theorists, the authors view addiction as a condition that is the result of a person's misguided attempts at self-repair because of deficits in psychic structure. Vulnerability of self is the consequence of developmental failures and deprivation. Substance abuse only exacerbates this condition leading to exaggerated difficulty in regulation of affect, self-care, and characterological pathology. Abstinence is usually required as the first step in arresting this process and establishing a treatment regimen that will allow the vulnerabilities of the self to be altered and restored. This article suggests that this recovery and treatment process is best accomplished in a group therapy setting that is conducted within the guidelines of the principles of object relations theory and a modified version of Yalom's interactional group therapy format.

Affect↗

PubMedDate not supplied

Culturally appropriate substance abuse treatment for parenting African American women.

Culturally appropriate strategies have been deemed necessary for the treatment of substance abuse among African American women. This qualitative study was conducted utilizing a grounded theory methodology within a womanist theoretical framework to explore the process by which parenting African American women participate in formal substance abuse treatment programs. Study findings yielded significant insights into this process and support the notion that culturally appropriate frameworks are necessary to help substance-abusing African American women enter into treatment programs and remain in recovery. In addition, specific interventions for treating substance-abusing African American women within a culturally relevant framework are discussed.

Adaptation, Psychological↗

PubMed1996

Drivers' biased perceptions of the adverse consequences of drink-driving.

The decision to drink and drive may involve the subjective process of weighing the perceived risks of adverse consequences of the behaviour against perceived utility components. Deterrence theory proposes that an individual will refrain from drink-driving if the perceived chances of experiencing negative outcomes associated with the behaviour are high. Previous research has demonstrated that there may be a mechanism of judgmental bias which influences individuals' perceived probabilities of rarely occurring events. In general driver age and gender have been shown independently to be both indicative and non-indicative for the operation of the bias in terms of subjective perceptions of driver skill, safety and accident involvement. Little evidence has been presented to describe the nature of the bias in the specific domain of drink-driving. Responses from more than 1000 UK drivers were examined to establish whether a system of bias operated for judgments of the likelihood of experiencing several possible adverse consequences of drink-driving across males/females, age groups and offenders/non-offenders. In general drivers were found to perceive themselves as less likely than the average driver to be accident involved while impaired and non-impaired by alcohol. Drivers reporting previous drink-driving behaviour indicated the greatest bias. The age and gender of the driver, independently and in interaction, were not shown to be important in the operation of these perceptual inconsistencies. Findings are discussed for implications of deterrence based drink-driving counter-measures.

Journal Article↗

PubMed2006

Religion, spirituality and the well-being of informal caregivers: a review, critique, and research prospectus.

The purpose of this article is to review and critique the published literature examining the relationships between religion/spirituality and caregiver well-being and to provide directions for future research. A systematic search was conducted using bibliographic databases, reference sections of articles, and by contacting experts in the field. Articles were reviewed for measurement, theoretical, and design limitations. Eighty-three studies were retrieved. Research on religion/spirituality and caregiver well-being is a burgeoning area of investigation; 37% of the articles were published in the last five years. Evidence for the effects of religion/spirituality were unclear; the preponderance (n = 71, 86%) of studies found no or a mixed association (i.e., a combination of positive, negative, or non-significant results) between religion/spirituality and well-being. These ambiguous results are a reflection of the multidimensionality of religion/spirituality and the diversity of well-being outcomes examined. They also partially reflect the frequent use of unrefined measures of religion/spirituality and of atheoretical approaches to studying this topic. Investigators have a fairly large number of studies on religion/spirituality and caregiver well-being on which to build. Future studies should be theory driven and utilize psychometrically sound measures of religion/spirituality. Suggestions are provided to help guide future work.

Caregivers↗

PubMedDate not supplied

What do residents learn by meeting with families of children with disabilities?: A qualitative analysis of an experiential learning module.

PURPOSE: Attitudes of medical providers towards persons with disabilities can affect the quality of care their patients receive. The authors evaluated an experiential learning module to investigate what Paediatric and Medicine/Paediatric residents at the University of Miami/Jackson Memorial Hospital learn from visiting the homes of families with children who have disabilities. METHODS: Families were recruited through a community-based parent organization. The families were instructed to discuss what it is like to have a child with a disability and to think about a primary message to give to residents during a 1-2 hour home visit. Since 1998, residents participated as part of the required Developmental Paediatrics rotation. They were instructed to write a one-page narrative description of their visit. The authors utilized the grounded theory of qualitative research and content analysis to count the key themes identified in the residents' descriptions. RESULTS: Twenty-four families and 63 residents participated in the learning module. The resident observations yielded four major themes. Twenty-four per cent stated families needed more information; 79% noted that families face various obstacles, including financial (33%), medical providers' pessimism (29%), inter-personal family conflicts (27%) and medical system problems (22%); 49% of residents commented that families adjust and cope with their child's disability; and 27% of residents stated that the experience changed their insight about children with disabilities. CONCLUSION: The authors' study suggests that a single home visit with the family of a child with a disability provides paediatrics and medicine/paediatrics residents with insights into the family's perspective on disability otherwise unattainable in a hospital-based training programme.

Child↗

PubMed2004

Optimizing substitution matrices by separating score distributions.

MOTIVATION: Homology search is one of the most fundamental tools in Bioinformatics. Typical alignment algorithms use substitution matrices and gap costs. Thus, the improvement of substitution matrices increases accuracy of homology searches. Generally, substitution matrices are derived from aligned sequences whose relationships are known, and gap costs are determined by trial and error. To discriminate relationships more clearly, we are encouraged to optimize the substitution matrices from statistical viewpoints using both positive and negative examples utilizing Bayesian decision theory. RESULTS: Using Cluster of Orthologous Group (COG) database, we optimized substitution matrices. The classification accuracy of the obtained matrix is better than that of conventional substitution matrices to COG database. It also achieves good performance in classifying with other databases.

Algorithms↗

PubMed1998

Use of guidelines in primary care--practitioners' perspectives.

BACKGROUND AND OBJECTIVES: Concern about the inadequate take-up of guidelines in general practice has concentrated on problems arising from the process of their development and implementation. However, these perspectives fail to take account of the needs, attitudes and problems of GPs themselves. In this study we aimed to identify barriers to the use of guidelines and opportunities for tackling them, from the point of view of the GP, so that future guideline development and policy could be more sensitive to the needs of GPs in the environment in which they work. METHOD: Twenty in-depth semi-structured interviews were audiotaped with GPs from within the Avon Health Authority area, representing GPs with different backgrounds and working environments. The transcribed data collected were analysed using a grounded theory approach. RESULTS: Utilization of guideline information is complex. GPs' appraisals of the value of guidelines interact with prior knowledge and beliefs, practicalities of existing information storage and retrieval systems, and individual working practices. Conditions where guidelines are most likely to be referred to may be those either very rarely or very commonly presenting in general practice. Key issues for the uptake of guidelines in the consultation are: general preference for certain formats of presentation; reputability and ownership; use of guidelines in shared decision-making; scope for computer-based systems; and GPs' attitudes to time pressures on information-seeking in relation to tolerance of uncertainty. CONCLUSION: Local initiatives might usefully explore the possibilities of supporting development of guideline-retrieval systems customized for individual GPs or practices. Novel means of stimulating 'ownership' and demonstrating reputability should be sought. The analysis provides a framework for understanding the complexities of the processes of GPs' use of guidelines in practice which can be useful in explaining the results of trials of guideline effectiveness. Guideline implementation occurs in the context of conflicting pressures for clinical autonomy and professional standardization and quality improvement.

Attitude of Health Personnel↗

PubMedDate not supplied

Advanced practice nursing model for comprehensive care with chronic illness: model for promoting process engagement.

New models of providing care to chronically ill persons are needed that can facilitate a more integrative approach to patient care. The purposes of this article are to describe the utilization of a theory synthesis process for development of a client-focused approach for advanced practice nurse (APN) management of chronic illness and to present the Model for Promoting Process Engagement. The model was developed as a theory-driven intervention to address complexities of chronic illness care. This APN practice model is the direct result of the synthesis of a number of differing theoretical models developed by the authors in previous individual research endeavors.

Caregivers↗