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561.
García-Fernández G Secades-Villa R García-Rodríguez O Alvarez-López H Sánchez-Hervás E Fernández-Hermida JR Fernández-Artamendi S 《Psicothema》2011,23(1):114-118
Voucher-based contingency management (CM) research has demonstrated efficacy for treating cocaine addiction, but few studies have examined associations between individual baseline characteristics and response to CM treatments. The aim of this study, involving 50 cocaine outpatients receiving CM for cocaine addiction, was to assess the impact of baseline characteristics on abstinence outcomes after six months of treatment. Patients who were abstinent after six months of treatment accounted for 58% of the sample. Patients with higher scores on the Alcohol area of the EuropASI and patients that were non-abstinent during the first month of treatment were less likely to achieve abstinence. These outcome predictors have implications both for treatment research and for clinical practice. Patients who do not respond early to treatment may need a more intensive intervention, and concomitant problematic alcohol use should be detected and treated. The remaining baseline variables examined were not statistically significant predictors of abstinence. This finding is important for the generalizability of CM across the range of individual characteristics of treatment-seeking cocaine abusers. 相似文献
562.
Proportion correct in two-alternative forced choice (2AFC) detection tasks often varies when the stimulus is presented in the first or in the second interval. Reanalysis of published data reveals that these order effects (or interval bias) are strong and prevalent, refuting the standard difference model of signal detection theory. Order effects are commonly regarded as evidence that observers use an off-center criterion under the difference model with bias. We consider an alternative difference model with indecision whereby observers are occasionally undecided and guess with some bias toward one of the response options. Whether or not the data show order effects, the two models fit 2AFC data indistinguishably, but they yield meaningfully different estimates of sensory parameters. Under indeterminacy as to which model governs 2AFC performance, parameter estimates are suspect and potentially misleading. The indeterminacy can be circumvented by modifying the response format so that observers can express indecision when needed. Reanalysis of published data collected in this way lends support to the indecision model. We illustrate alternative approaches to fitting psychometric functions under the indecision model and discuss designs for 2AFC experiments that improve the accuracy of parameter estimates, whether or not order effects are apparent in the data. 相似文献
563.
García-Pérez MA Alcalá-Quintana R Woods RL Peli E 《Attention, perception & psychophysics》2011,73(3):829-853
Recent studies have reported that flanking stimuli broaden the psychometric function and lower detection thresholds. In the present study, we measured psychometric functions for detection and discrimination with and without flankers to investigate whether these effects occur throughout the contrast continuum. Our results confirm that lower detection thresholds with flankers are accompanied by broader psychometric functions. Psychometric functions for discrimination reveal that discrimination thresholds with and without flankers are similar across standard levels, and that the broadening of psychometric functions with flankers disappears as standard contrast increases, to the point that psychometric functions at high standard levels are virtually identical with or without flankers. Threshold-versus-contrast (TvC) curves with flankers only differ from TvC curves without flankers in occasional shallower dippers and lower branches on the left of the dipper, but they run virtually superimposed at high standard levels. We discuss differences between our results and other results in the literature, and how they are likely attributed to the differential vulnerability of alternative psychophysical procedures to the effects of presentation order. We show that different models of flanker facilitation can fit the data equally well, which stresses that succeeding at fitting a model does not validate it in any sense. 相似文献
564.
María del Carmen Aguilar‐Luzón José Miguel Ángel García‐Martínez Antonia Calvo‐Salguero José María Salinas 《Journal of applied social psychology》2012,42(11):2797-2833
Environmental behaviors have been analyzed from different theoretical models. The theory of planned behavior emphasizes the attitudinal aspects associated with behavior, while the value–belief–norm model regarding the environment focuses on the importance of moral components when setting environmental behaviors in motion. The objective of this study was to analyze both models, comparing both their degree of fit and their predictive power regarding recycling behavior. To do so, we used a sample made up of 154 Spanish housewives. The results indicated that despite the fact that the theory of planned behavior is a general model for predicting and explaining behavior, it has a greater degree of fit and greater capacity to predict recycling behavior than the value–belief–norm model regarding the environment. 相似文献
565.
Loneliness and mental health in a representative sample of community-dwelling Spanish older adults 总被引:1,自引:0,他引:1
Losada A Márquez-González M García-Ortiz L Gómez-Marcos MA Fernández-Fernández V Rodríguez-Sánchez E 《The Journal of psychology》2012,146(3):277-292
Research seems to support loneliness as a risk factor for mental health problems in the elderly. Most studies analyzing the effects of loneliness on older adults' mental health have relied on convenience samples. In this study, the prevalence and predictors of feelings of loneliness were studied in a representative sample of 272 community-dwelling Spanish older adults. The potential of feelings of loneliness to significantly contribute to the explanation of mental health of the elderly was also explored. The percentage of people reporting feelings of loneliness was 23.1%. Being a woman, being older, living alone, having fewer economic resources, having lower perceived health, and being dissatisfied with the frequency of contact with relatives and friends were found to be significant predictors of feelings of loneliness. Loneliness contributed significantly to the explanation of mental health, even when other significant variables were statistically controlled. The results of this study suggest that loneliness is a relevant factor for the analysis and understanding of mental health in the elderly. 相似文献
566.
Balcazar FE Suarez-Balcazar Y Adames SB Keys CB García-Ramírez M Paloma V 《American journal of community psychology》2012,49(1-2):283-293
Latino immigrant families with children with disabilities experience multiple sources of oppression during their settlement process in the United States. Unfair social structures and dominant cultural values and norms and the way they influence the immigrants' personal life stories generate a cycle of oppression very difficult to break. This paper presents a case study of how a group of Latino parents carried out a process of liberation fueled by the generation of empowering community narratives (critical awareness leading to transformative action) that resulted from a community-university partnership. Participants initiated a process that led them to discover their own stories of oppression and create new stories; to deconstruct the dominant cultural narratives and modify existing ones; and to understand contexts for power sharing. This joint reflection and increased awareness propelled group members to take action by founding a grassroots organization to redress some of the injustices that were partly responsible for their oppression, thus generating shifts at the personal, relational, and collective levels. In light of the theory of liberation, we discuss the participants' development of critical awareness that led them to take action to address their unmet needs. 相似文献
567.
Ortiz Bonnín S Navarro Guzmán C García Buades E Ramis Palmer C Manassero Mas MA 《Psicothema》2012,24(2):337-342
This study presents the validity and reliability analysis of a questionnaire that assesses emotion work in the service sector. Emotion work is a term introduced by Hochschild (1983) and it refers to the expression of organizationally desirable emotions to influence the interactions with clients at work. The results show a 6-factor structure: Requirement to display Positive, Negative and Neutral Emotions, Sensitivity Requirements, Interaction Control and Emotional Dissonance. The analysis of the sub-scale scores reveals that the most frequently expressed emotions are positive, whereas negative emotions are expressed less frequently. 相似文献
568.
This paper describes a useful technique for quantifying the degree of speech deficits in dementia of GDS 4 Alzheimer's type (DAT). Production of prosodic speech in DAT patients and healthy older controls was analysed using variation in fundamental frequency (F0) measures on a reading task. The prosogram computational model was used to analyze the prosodic contours of the speech samples, using melodic styling of F0 based on perceptual principles and prominence detection of spectral and amplitude fluctuations in the speech signal. Results revealed significant differences in most of these prosodic parameters among the DAT group. Normal pitch variation in speech and variations in syllable timing were reduced in the DAT group, these features cause "flat" speech prosody in these patients. These speech parameters may have diagnostic and prognostic value for Alzheimer's disease and therefore could be a useful aid in clinical trials. 相似文献
569.
570.
Sánchez-Hervás E Santonja Gómez FJ Secades Villa R García-Fernández G García-Rodríguez O Zacarés Romaguera F 《The Spanish journal of psychology》2012,15(2):748-755
Relapses in cocaine abusers in treatment are an important problem. The majority of patients are incapable of sustaining abstinence over any length of time. To identify the factors associated to relapses risk in the cocaine use can be an optimal choice to improve the treatment strategies. The aim of this study was to analyze relapse-risk factors in cocaine-dependent patients on treatment. Participants were 102 patients who had begun outpatient treatment at a public health center in Spain. Some functional areas and cocaine use are evaluated for a period of six months. A structural equations model was used to identify possible predictive variables. The results show that social-family environment and economic-employment situation were associated with greater risk of relapse. Likewise, the social-family environment was related to severity of addiction. It is concluded that the incorporation of family intervention strategies and vocational/employment counseling may help to reduce relapse rates in cocaine addicts receiving treatment. 相似文献