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1.
Child Youth Care Forum ; : 1-25, 2023 Mar 31.
Artigo em Inglês | MEDLINE | ID: mdl-37360766

RESUMO

Background: Postsecondary education can provide opportunities for students from traditionally hidden populations like those who have experienced foster care or homelessness. To assist these students, campus support programs (CSPs) provide a wide range of services and activities. Objective: Evidence of the impact of CSPs is limited, and little is known about how students who were involved in CSPs fare at or after graduation. This study seeks to address these gaps in knowledge. Methods: This mixed-methods study surveyed 56 young people involved in a CSP for college students who have experienced foster care, relative care, or homelessness. Participants completed surveys at graduation, 6 months post-graduation, and one-year post-graduation. Results: At graduation, over two-thirds of the students felt completely (20.4%) or fairly (46.3%) prepared for life after graduation. Most felt completely (37.0%) or fairly confident (25.9%) that they would get a job after graduation. Six months after graduation, 85.0% of the graduates were employed, with 82.2% working at least full-time. 45% of the graduates were enrolled in graduate school. These numbers were similar a year after graduation. Post-graduation, participants described areas of their lives that were going well, obstacles and hardships faced, changes they would like to see in their lives, and post-graduation needs. Across these areas themes were present in the areas of finances, work, relationships, and resilience. Conclusions: Institutions of higher education and CSP should assist students with a history of foster care, relative care, and homelessness to ensure that after graduation, they have adequate money, employment, and support.

2.
Child Youth Serv Rev ; 143: 106696, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36339493

RESUMO

The onset of the Coronavirus disease (COVID-19) pandemic forced higher education institutions to abruptly transition to remote services and online learning. Students with a foster care background are a subgroup of students who have been particularly hard hit by the pandemic, as were the campus-based programs (CSPs) designed to support them. The purpose of this study was to learn about the impact of the pandemic on CSPs and CSP participants. Focus groups were conducted with CSP administrators and separately with CSP students from two- and four-year colleges in California. The first theme that emerged from the data focused on challenges exacerbated by the pandemic, with six subthemes zeroing in on breaks in social connections, academic disruptions, technology woes, gaps in basic needs, employment challenges, and the toll on mental health. The second theme described participants' responses, including their creative and collaborative actions. Administrators quickly adapted service delivery, formed partnerships with new units and organizations to ensure students' needs were met, and found creative ways to stay connected with students during a time of pervasive isolation. Students talked about their own efforts to access resources, connect with peers, and use of strategies to manage challenges such as burnout and depression. A second subtheme highlighted the ways participants displayed resilience, such as creating boundaries to manage their own self-care and leaning on each other for support. The findings from this study increase our understanding of the experiences students faced during the pandemic and shed light on implications moving forward to support students with foster care histories in higher education.

3.
Child Maltreat ; 27(4): 658-670, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-34311552

RESUMO

Recent federal laws and state policies reflect the government's investment in improving education and employment outcomes for youth with foster care histories. However, little research has assessed the roles of these programs using national data. Drawing on data from the National Youth in Transitions Database (NYTD) (n = 7797), this study examines the roles that state-level policies and programs, youth-level participation in programs and services, and youth characteristics play in youths' connection to employment and education ("connectedness") at age 21. Results from multilevel regression analyses find that foster youth in states with widely available tuition waiver programs increases the odds of connectedness to school. The amount of time youth spend in extended foster care, as well as receipt of postsecondary education aid and services, also increases connectedness. Study findings underscore the importance of material and relational supports in supporting foster youths' connection to employment and education in early adulthood.


Assuntos
Assistência ao Convalescente , Criança Acolhida , Adolescente , Adulto , Emprego , Cuidados no Lar de Adoção , Humanos , Políticas , Adulto Jovem
4.
Child Abuse Negl ; 91: 147-159, 2019 05.
Artigo em Inglês | MEDLINE | ID: mdl-30889437

RESUMO

BACKGROUND: The majority of children in foster care 24 months or longer experience three or more placements. Children's behavior problems are a primary contributor to multiple moves, but little is known about how behavior problems and other stressors lead to disruptions. This study focused on foster parents' experiences of parenting a child at risk for moves using the determinants of parenting model (Belsky, 1984) to identify potential correlates of difficult parenting experiences and placement disruption. OBJECTIVE: To identify factors associated with difficult parenting experiences and placement disruption. PARTICIPANTS: Foster parents (N = 139) caring for children age 8-14 in long term foster care with a history of two or more moves were randomly selected in a large Midwestern state in the U.S. METHODS: Participants completed a 90-minute telephone interview (86% response rate). Placement moves were tracked prospectively for two years. Parenting experiences and disruption were analyzed using multiple and logistic regression. RESULTS: Results support aspects of the determinants of parenting model. Behavior problems, children's risk to others, low support, and stress were significantly associated with more difficult parenting experiences (ßs = .28, .22, .18, .19, respectively, ps < .05), and more difficult parenting experiences strongly predicted placement disruption (p < .01). Risk to others also predicted disruption before including parenting experiences, with this association becoming nonsignificant after including parenting experiences. Unexpectedly, African American foster parents had a higher risk for disruption, despite more positive parenting experiences. CONCLUSIONS: These findings support attending to foster parents' parenting experiences, children's risk to others, social support and stress to better support placements of children at risk for disruption.


Assuntos
Comportamento Infantil , Criança Acolhida/psicologia , Cuidados no Lar de Adoção/psicologia , Poder Familiar , Comportamento Problema , Adolescente , Adulto , Negro ou Afro-Americano , Criança , Transtornos do Comportamento Infantil , Feminino , Humanos , Análise dos Mínimos Quadrados , Masculino , Análise Multivariada , Pais , Apoio Social
5.
Dementia (London) ; 18(4): 1373-1392, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-28449593

RESUMO

OBJECTIVES: Literature regarding Montessori-based activities with older adults with dementia is fairly common with early stages of dementia. Conversely, research on said activities with individuals experiencing late-stage dementia is limited because of logistical difficulties in sampling and data collection. Given the need to understand risks and benefits of treatments for individuals with late-stage dementia, specifically regarding their mental and behavioral health, this study sought to evaluate the effects of a Montessori-based activity program implemented in a long-term care facility. METHOD: Utilizing an interrupted time series design, trained staff completed observation-based measures for 43 residents with late-stage dementia at three intervals over six months. Empirical measures assessed mental health (anxiety, psychological well-being, quality of life) and behavioral health (problem behaviors, social engagement, capacity for activities of daily living). RESULTS: Group differences were observed via repeated measures ANOVA and paired-samples t-tests. The aggregate, longitudinal results-from baseline to final data interval-for the psychological and behavioral health measures were as follows: problem behaviors diminished though not significantly; social engagement decreased significantly; capacities for activities of daily living decreased significantly; quality of life increased slightly but not significantly; anxiety decreased slightly but not significantly; and psychological well-being significantly decreased. CONCLUSION: Improvements observed for quality of life and problem behaviors may yield promise for Montessori-based activities and related health care practices. The rapid physiological and cognitive deterioration from late-stage dementia should be considered when interpreting these results.


Assuntos
Demência/terapia , Relações Interpessoais , Qualidade de Vida/psicologia , Índice de Gravidade de Doença , Atividades Cotidianas , Idoso , Ansiedade/psicologia , Demência/psicologia , Feminino , Humanos , Estudos Longitudinais , Masculino , Casas de Saúde , Comportamento Problema/psicologia
6.
J Pediatr Hematol Oncol ; 40(7): 495-498, 2018 10.
Artigo em Inglês | MEDLINE | ID: mdl-30044354

RESUMO

BACKGROUND: Children with sickle cell disease (SCD) demonstrate deficits in cognitive and academic functioning. This study compared the visual motor integration (VMI) skills of children with SCD to non-SCD sibling controls. PROCEDURE: In total, 105 participants (67 patients with SCD, 38 controls) were recruited during a routine clinic visit. Each participant was administered the Grooved Pegboard Test, a test of manual dexterity and the Beery-Buktenica Developmental Test of VMI, a measure of graphomotor skills. RESULTS: Children with SCD demonstrated average (M=89.61, SE=3.08) fine manual dexterity and speed, but more complex fine motor functioning (graphomotor skills) (M=77.61, SE=1.65) was impaired. Relative to healthy siblings, children with SCD were not found to have different fine manual dexterity and speed (P=0.617). Patients with SCD were found to have significantly worse graphomotor skills (P=0.04). CONCLUSIONS: Children with SCD were found to have average basic fine motor dexterity and speed, but impaired VMI, a more complex fine motor skill. This finding is significant given the functional importance of complex fine motor skills in early academic activities.


Assuntos
Anemia Falciforme/psicologia , Transtornos das Habilidades Motoras , Desempenho Psicomotor , Adolescente , Estudos de Casos e Controles , Criança , Pré-Escolar , Transtornos Cognitivos , Feminino , Humanos , Deficiências da Aprendizagem , Masculino , Irmãos
7.
Geriatr Nurs ; 39(6): 663-668, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-29807671

RESUMO

Research shows African Americans at greater risk of developing Alzheimer's disease (AD) compared to the Caucasian population, suggesting African American AD caregivers are rising in numbers at a greater rate than Caucasian counterparts. Over a decade ago, an article in Geriatric Nursing revealed spiritual well-being differences among these caregiver groups. The purpose of this study was a quasi-follow-up, utilizing a larger caregiver sample to test spiritual support as a moderator via a risk-and-resilience framework. Secondary data analysis from a sample of 691 AD caregivers examined data on demographics and standardized measures of spiritual support, caregiver burden, and psychological resilience. One-third of the sample reported as African American. Resilience negatively regressed, though not significantly, on caregiving burden among both groups. Spiritual support positively, significantly impacted resilience among both groups, slightly stronger among African Americans. Spiritual support did not significantly moderate risk with either group. Implications for professional healthcare practice are discussed.


Assuntos
Doença de Alzheimer , Negro ou Afro-Americano/psicologia , Cuidadores/psicologia , Resiliência Psicológica , Espiritualidade , População Branca/psicologia , Estudos Transversais , Feminino , Enfermagem Geriátrica , Humanos , Masculino , Pessoa de Meia-Idade , Qualidade de Vida/psicologia , Apoio Social , Inquéritos e Questionários
8.
Health Soc Work ; 43(2): 101-108, 2018 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-29554326

RESUMO

The purpose of this study was to conduct psychometric reevaluation of the Bristol Activities of Daily Living Scale (BADL) among a population logistically difficult to observe beyond cross-sectional analysis: nursing home residents with advanced dementia (AD). Data from observation-based measures were collected by nursing home staff at two intervals within a three-month time frame among 43 residents identified with AD via medical records and nursing home staff. Three broad properties of BADL were examined: factor structure, reliability, and validity. Principal components analysis determined underlying components. BADL internal consistency was assessed by Cronbach's and Guttman coefficients; test-retest reliability was also observed. Convergent validity was assessed by correlating BADL with theoretically linked measures of quality of life (QOL) and social engagement. Compared with the original evaluation, BADL showed inconsistent factor structure at interval 1 but comparable at interval 2. Reliability coefficients at both intervals were robust and comparable to the original evaluation. BADL demonstrated significant convergence with QOL and social engagement. Psychometric potency of BADL was confirmed, suggesting practice applicability with this AD population. Future research calls for further examination of tools to guide effective interventions with this vulnerable population.


Assuntos
Atividades Cotidianas , Demência , Casas de Saúde , Psicometria/estatística & dados numéricos , Reprodutibilidade dos Testes , Índice de Gravidade de Doença , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Estudos Prospectivos , Qualidade de Vida , Inquéritos e Questionários
9.
Artigo em Inglês | MEDLINE | ID: mdl-29555627

RESUMO

In Toxoplasma gondii, calcium-dependent protein kinase 1 (CDPK1) is an essential protein kinase required for invasion of host cells. We have developed several hundred CDPK1 inhibitors, many of which block invasion. Inhibitors with similar 50% inhibitory concentrations (IC50s) were tested in thermal shift assays for their ability to stabilize CDPK1 in cell lysates, in intact cells, or in purified form. Compounds that inhibited parasite growth stabilized CDPK1 in all assays. In contrast, two compounds that showed poor growth inhibition stabilized CDPK1 in lysates but not in cells. Thus, cellular exclusion could explain exceptions in the correlation between the action on the target and cellular activity. We used thermal shift assays to examine CDPK1 in two clones that were independently selected by growth in the CDPK1 inhibitor RM-1-132 and that had increased 50% effective concentrations (EC50s) for the compound. The A and C clones had distinct point mutations in the CDPK1 kinase domain, H201Q and L96P, respectively, residues that lie near one another in the inactive isoform. Purified mutant proteins showed RM-1-132 IC50s and thermal shifts similar to those shown by wild-type CDPK1. Reduced inhibitor stabilization (and a presumed reduced interaction) was observed only in cellular thermal shift assays. This highlights the utility of cellular thermal shift assays in demonstrating that resistance involves reduced on-target engagement (even if biochemical assays suggest otherwise). Indeed, similar EC50s were observed upon overexpression of the mutant proteins, as in the corresponding drug-selected parasites, although high levels of CDPK1(H201Q) only modestly increased resistance compared to that achieved with high levels of wild-type enzyme.


Assuntos
Quinase 2 de Adesão Focal/antagonistas & inibidores , Naftalenos/farmacologia , Piperidinas/farmacologia , Inibidores de Proteínas Quinases/farmacologia , Pirazóis/farmacologia , Toxoplasma/efeitos dos fármacos , Toxoplasmose/tratamento farmacológico , Animais , Resistência a Medicamentos/genética , Quinase 2 de Adesão Focal/genética , Humanos , Proteínas de Protozoários/antagonistas & inibidores , Proteínas de Protozoários/genética , Toxoplasma/genética
10.
Child Abuse Negl ; 61: 1-12, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27676588

RESUMO

Child welfare agencies have adopted assessment tools and instruments to inform the level of risk and guide the agency's level of intervention with the family. Actuarial assessments may be more uniform but inflexible with respect to practice wisdom whereas clinical or consensus-based assessments are more comprehensive and intuitive but lack objectivity. The purpose of the current study is to compare clinical and actuarial methods of risk assessment used by child welfare workers to make decisions about substantiation and services. The current study examined the (1) association between clinical and actuarial dimensions, (2) association between actuarial dimensions and outcomes, (3) association between clinical dimensions and outcomes, (4) caseworker primary use of actuarial dimensions, and (5) caseworker supplementary use of actuarial dimensions. Findings indicated that the actuarial may not be solely predictive of agency intensity with respect to case decision and service provision. Our findings suggest that dual-measurement does inform intensity, and we speculate from these findings that the measures may be involved with decision-making in a complex way. This study may be best viewed as a means by which researchers begin to parse how decisions are made; with this information, instruments may be better tailored to facilitate clinical, critical thought.


Assuntos
Maus-Tratos Infantis/diagnóstico , Serviços de Proteção Infantil/métodos , Criança , Proteção da Criança , Consenso , Tomada de Decisões , Prática Clínica Baseada em Evidências , Características da Família , Feminino , Humanos , Masculino , Medição de Risco/métodos , Inquéritos e Questionários
11.
Fam Process ; 55(4): 660-672, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27489227

RESUMO

Families who foster offer essential care for children and youth when their own parents are unable to provide for their safety and well-being. Foster caregivers face many challenges including increased workload, emotional distress, and the difficulties associated with health and mental health problems that are more common in children in foster care. Despite these stressors, many families are able to sustain fostering while maintaining or enhancing functioning of their unit. This qualitative study applied an adaptational process model of family resilience that emerged in previous studies to examine narratives of persistent, long-term, and multiple fostering experiences. Data corroborated previous research in two ways. Family resilience was again described as a transactional process of coping and adaptation that evolves over time. This process was cultivated through the activation of 10 family strengths that are important in different ways, during varied phases.


Assuntos
Adaptação Psicológica , Família/psicologia , Cuidados no Lar de Adoção/psicologia , Modelos Psicológicos , Resiliência Psicológica , Estresse Psicológico/psicologia , Acesso à Informação , Criança , Comportamento Infantil , Serviços de Saúde da Criança , Proteção da Criança , Emoções , Relações Familiares/psicologia , Humanos , Entrevistas como Assunto , Pesquisa Qualitativa , Inquéritos e Questionários , Gerenciamento do Tempo
12.
Soc Work ; 60(3): 201-9, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-26173361

RESUMO

Social workers are at risk for experiencing burnout and secondary traumatic stress (STS) as a result of the nature of their work and the contexts within which they work. Little attention has been paid to the factors within a social worker's control that may prevent burnout and STS and increase compassion satisfaction. Empathy, which is a combination of physiological and cognitive processes, may be a tool to help address burnout and STS. This article reports on the findings of a study of social workers (N = 173) that explored the relationship between the components of empathy, burnout, STS, and compassion satisfaction using the Empathy Assessment Index and the Professional Quality of Life instruments. It was hypothesized that higher levels of empathy would be associated with lower levels of burnout and STS, and higher levels of compassion satisfaction. Findings suggest that components of empathy may prevent or reduce burnout and STS while increasing compassion satisfaction, and that empathy should be incorporated into training and education throughout the course of a social worker's career.


Assuntos
Esgotamento Profissional/etiologia , Empatia , Serviço Social , Estresse Psicológico , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários , Adulto Jovem
13.
Am J Alzheimers Dis Other Demen ; 30(3): 238-46, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25267930

RESUMO

Focusing on the understudied, increasing population of male Alzheimer's disease (AD) caregivers, the purpose of this study was to identify their likelihood of utilizing 3 coping strategies (task focused, emotion focused, and avoidance focused) and to examine the effects of each coping strategy on caregiving burden. Data were collected from 138 male AD caregivers in southern United States, including geographically proportional representation of African Americans in the sample. Stepwise regression revealed effects of each coping strategy on caregiving burden, controlling for demographics. The sample reported high burden. Task focused was the highest reported coping strategy. Yet, regression models indicated no significant effect of task-focused coping on burden outcomes. Emotion-focused and avoidance-focused coping each showed significant proportional effects on burden. Implications suggest that emotion- and avoidance-focused coping among male AD caregivers may be maladaptive, that is, reinforcing burden. Male AD caregivers may benefit from more task-focused coping, such as planning and active problem solving.


Assuntos
Adaptação Psicológica/fisiologia , Doença de Alzheimer/enfermagem , Cuidadores/psicologia , Efeitos Psicossociais da Doença , Idoso , Humanos , Masculino , Pessoa de Meia-Idade
14.
PLoS One ; 9(11): e112096, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25369183

RESUMO

Toxoplasma gondii and malaria parasites contain a unique and essential relict plastid called the apicoplast. Most apicoplast proteins are encoded in the nucleus and are transported to the organelle via the endoplasmic reticulum (ER). Three trafficking routes have been proposed for apicoplast membrane proteins: (i) vesicular trafficking from the ER to the Golgi and then to the apicoplast, (ii) contiguity between the ER membrane and the apicoplast allowing direct flow of proteins, and (iii) vesicular transport directly from the ER to the apicoplast. Previously, we identified a set of membrane proteins of the T. gondii apicoplast which were also detected in large vesicles near the organelle. Data presented here show that the large vesicles bearing apicoplast membrane proteins are not the major carriers of luminal proteins. The vesicles continue to appear in parasites which have lost their plastid due to mis-segregation, indicating that the vesicles are not derived from the apicoplast. To test for a role of the Golgi body in vesicle formation, parasites were treated with brefeldin A or transiently transfected with a dominant-negative mutant of Sar1, a GTPase required for ER to Golgi trafficking. The immunofluorescence patterns showed little change. These findings were confirmed using stable transfectants, which expressed the toxic dominant-negative sar1 following Cre-loxP mediated promoter juxtaposition. Our data support the hypothesis that the large vesicles do not mediate the trafficking of luminal proteins to the apicoplast. The results further show that the large vesicles bearing apicoplast membrane proteins continue to be observed in the absence of Golgi and plastid function. These data raise the possibility that the apicoplast proteome is generated by two novel ER to plastid trafficking pathways, plus the small set of proteins encoded by the apicoplast genome.


Assuntos
Apicoplastos/metabolismo , Complexo de Golgi/metabolismo , Proteínas de Protozoários/metabolismo , Toxoplasma/metabolismo , Vesículas Transportadoras/metabolismo , Regulação da Expressão Gênica , Regiões Promotoras Genéticas , Biossíntese de Proteínas , Transporte Proteico
15.
ACS Med Chem Lett ; 5(1): 40-44, 2014 Jan 09.
Artigo em Inglês | MEDLINE | ID: mdl-24494061

RESUMO

5-Aminopyrazole-4-carboxamide was used as an alternative scaffold to substitute for the pyrazolopyrimidine of a known "bumped kinase inhibitor" to create selective inhibitors of calcium-dependent protein kinase-1 from both Toxoplasma gondii and Cryptosporidium parvum. Compounds with low nanomolar inhibitory potencies against the target enzymes were obtained. The most selective inhibitors also exhibited submicromolar activities in T. gondii cell proliferation assays and were shown to be non-toxic to mammalian cells.

16.
Child Maltreat ; 19(1): 3-16, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24425801

RESUMO

Adolescents, and especially male adolescents, make up a disproportionately smaller portion of maltreatment reports compared to younger children. This study used the National Child Abuse and Neglect Data System to better understand the characteristics of adolescents reported to Child Protective Services (CPS), to examine whether these characteristics changed over time, and to determine whether certain child or CPS report characteristics predicted CPS involvement. Although adolescents were the focal group, younger children were also analyzed for comparison. Between 2005 and 2010, reports of neglect and the proportion of children of Hispanic and unknown racial/ethnic origins increased. Concurrently, the proportion of cases resulting in CPS involvement declined. Although race/ethnicity predicted CPS involvement, this pattern was not consistent across all age groups or races/ethnicities. The type of alleged maltreatment did not typically predict CPS involvement; however, allegations of sexual abuse among school-aged children and adolescents, particularly among girls, were more likely to result in CPS involvement. These findings can assist child welfare professionals in determining appropriate services tailored to families and developing prevention programs targeting adolescents.


Assuntos
Maus-Tratos Infantis/estatística & dados numéricos , Proteção da Criança/estatística & dados numéricos , Adolescente , Fatores Etários , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Análise de Regressão , Fatores de Risco , Fatores Sexuais , Estados Unidos
17.
Int J Environ Res Public Health ; 10(8): 3192-202, 2013 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-23912200

RESUMO

Vector surveillance for infectious diseases is labor intensive and constantly threatened by budget decisions. We report on outcomes of an undergraduate research experience designed to build surveillance capacity for West Nile Virus (WNV) in Montana (USA). Students maintained weekly trapping stations for mosquitoes and implemented assays to test for WNV in pools of Culex tarsalis. Test results were verified in a partnership with the state health laboratory and disseminated to the ArboNET Surveillance System. Combined with prior surveillance data, Cx. tarsalis accounted for 12% of mosquitoes with a mean capture rate of 74 (±SD = 118) Cx. tarsalis females per trap and a minimum infection rate of 0.3 infected mosquitoes per 1000 individuals. However, capture and infection rates varied greatly across years and locations. Infection rate, but not capture rate, was positively associated with the number of WNV human cases (Spearman's rho = 0.94, p < 0.001). In most years, detection of the first positive mosquito pool occurred at least a week prior to the first reported human case. We suggest that undergraduate research can increase vector surveillance capacity while providing effective learning opportunities for students.


Assuntos
Culex , Insetos Vetores , Estudantes , Vírus do Nilo Ocidental , Animais , Culex/virologia , Feminino , Humanos , Insetos Vetores/virologia , Montana , Avaliação de Programas e Projetos de Saúde , Saúde Pública
18.
Behav Neurosci ; 127(3): 357-68, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23731073

RESUMO

The nature of the relationship between explicit and implicit learning is a topic of considerable debate. To investigate this relationship we conducted two experiments on postconditioning revaluation of the unconditional stimulus (UCS) in human fear conditioning. In Experiment 1, the intensity of the UCS was decreased after acquisition for one group (devaluation) and held constant for another group (control). A subsequent test revealed that even though both groups exhibited similar levels of UCS expectancy, the devaluation group had significantly smaller conditional skin conductance responses. The devaluation effect was not explained by differences in the explicit estimates of UCS probability or explicit knowledge that the UCS intensity had changed. In Experiment 2, the value of the UCS was increased after acquisition for one group (inflation) and held constant for another group (control). Test performance revealed that UCS inflation did not alter expectancy ratings, but the inflation group exhibited larger learned skin conductance responses than the control group. The inflation effect was not explained by differences in the explicit estimates of UCS probability or explicit knowledge that the UCS intensity had changed. The SCR revaluation effect was not dependent on explicit memory processes in either experiment. In both experiments we found differences on an implicit measure of learning in the absence of changes in explicit measures. Together, the differences observed between expectancy measures and skin conductance support the idea that these responses might reflect different types of memory formed during the same training procedure and be supported by separate neural systems.


Assuntos
Aprendizagem por Associação/fisiologia , Conscientização/fisiologia , Condicionamento Clássico/fisiologia , Medo/fisiologia , Intenção , Adolescente , Adulto , Análise de Variância , Estimulação Elétrica/efeitos adversos , Resposta Galvânica da Pele/fisiologia , Humanos , Estimulação Luminosa , Psicofísica , Tempo de Reação , Adulto Jovem
19.
Prev Sci ; 13(5): 539-50, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22878779

RESUMO

Although schools have been trying to address bullying by utilizing different approaches that stop or reduce the incidence of bullying, little remains known about what specific intervention strategies are most successful in reducing bullying in the school setting. Using the social-ecological framework, this paper examines school-based disciplinary interventions often used to deliver consequences to deter the reoccurrence of bullying and aggressive behaviors among school-aged children. Data for this study are drawn from the School-Wide Information System (SWIS) with the final analytic sample consisting of 1,221 students in grades K - 12 who received an office disciplinary referral for bullying during the first semester. Using Kaplan-Meier Failure Functions and Multi-level discrete time hazard models, determinants of the probability of a student receiving a second referral over time were examined. Of the seven interventions tested, only Parent-Teacher Conference (AOR = 0.65, p < .01) and Loss of Privileges (AOR = 0.71, p < .10) were significant in reducing the rate of the reoccurrence of bullying and aggressive behaviors. By using a social-ecological framework, schools can develop strategies that deter the reoccurrence of bullying by identifying key factors that enhance a sense of connection between the students' mesosystems as well as utilizing disciplinary strategies that take into consideration student's microsystem roles.


Assuntos
Bullying , Instituições Acadêmicas , Adolescente , Criança , Humanos
20.
Bioorg Med Chem Lett ; 22(16): 5264-7, 2012 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-22795629

RESUMO

Calcium-dependent protein kinase-1 (CDPK1) from Cryptosporidium parvum (CpCDPK1) and Toxoplasma gondii (TgCDPK1) have become attractive targets for discovering selective inhibitors to combat infections caused by these protozoa. We used structure-based design to improve a series of benzoylbenzimidazole-based compounds in terms of solubility, selectivity, and potency against CpCDPK1 and TgCDPK1. The best inhibitors show inhibitory potencies below 50 nM and selectivity well above 200-fold over two human kinases with small gatekeeper residues.


Assuntos
Benzimidazóis/química , Cryptosporidium parvum/enzimologia , Inibidores de Proteínas Quinases/química , Proteínas Quinases/química , Proteínas de Protozoários/antagonistas & inibidores , Toxoplasma/enzimologia , Benzimidazóis/síntese química , Benzimidazóis/metabolismo , Desenho de Fármacos , Humanos , Ligação Proteica , Inibidores de Proteínas Quinases/síntese química , Inibidores de Proteínas Quinases/metabolismo , Proteínas Quinases/metabolismo , Proteínas Proto-Oncogênicas c-abl/antagonistas & inibidores , Proteínas Proto-Oncogênicas c-abl/metabolismo , Proteínas de Protozoários/metabolismo , Solubilidade , Relação Estrutura-Atividade , Quinases da Família src/antagonistas & inibidores , Quinases da Família src/metabolismo
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