We present the generalized signal detection theory (GSDT), where familiarity is described by a sparse binomial distribution of binary node activity rather than by normal distribution of familiarity. Items are presented in a distributed representation, where each node receives either noise only, or signal and noise. An old response (i.e., a “yes” response) is made if at least one node receives signal plus noise that is larger than the activation threshold, and item variability is determined by the distribution of activated nodes as the threshold is varied. A distinct representation leads to better performance and a lower ratio of new to old item variability, than a more distributed and less distinct representations. Here we apply the GSDT to empirical data on verbal and olfactory memory and suggest that verbal memory relies on a distinct neural item representation, whereas olfactory memory has a fuzzy neural representation leading to poorer memory and inducing a larger ratio of new to old item variability. 相似文献
Background: Transgender adolescents who apply for treatment often experience a marked increase in body-related distress when entering puberty, accompanied by internalizing problems and poor peer relations. Although adolescence is a time of considerable psychosocial and physical change, generally associated with a decline in health-related quality of life (HRQoL), research on HRQoL in transgender youth and possible predictors is sparse. This study thus aims to explore the predictive value of body image factors and emotional and behavioral problems for HRQoL.
Methods: This cross-sectional one-group observational study was carried out at the Child and Adolescent psychiatric department (Gender Identity Service) in Hamburg, Germany. A sample of n = 126 (103 trans male and 23 trans female) adolescents, who were referred for counseling and/or treatment completed different standardized instruments before undergoing any sort of treatment. Firstly, five dimensions of HRQoL were explored in transgender adolescents and secondly, a linear regression model was applied to assess the impact of body image and emotional and behavioral problems on overall HRQoL.
Results: HRQoL was generally impaired in transgender adolescents compared to norm scores, especially with regard to aspects of psychological and physical well-being. Linear regression analysis revealed that greater internalizing problems and less body satisfaction significantly predicted lower HRQoL outcomes.
Conclusions: Impaired HRQoL may be explained by high degrees of internalizing problems and low body satisfaction. Thus, one important aim of mental health professionals working with youth should be to provide appropriate treatment and counseling options that may contribute to overall well-being in the long-term. 相似文献
This research examines the public discussion around animal production in Finland. Applying a dialogical approach to social representations theory, we elucidate the hotly debated nature of animal production by analysing news articles (N = 50) and the related reader-produced comments (N = 1501) in Finnish newspapers. We employed qualitative methods for analysing multivoicedness and dialogue to identify ego–alter pairs constructed in the material in relation to the object of animal production. Four prevalent ego–alter pairs were identified: advocates for animal rights–animal production defenders, producers–consumers, orthodox–unorthodox Christians and provincials–urban dwellers. The study contributes to the study of everyday knowledge by showing how various contradictory understandings of the same topic are generated in public discourse. The research also demonstrates how the theoretical concept of ego–alter embedded in the social representations theory can be empirically utilised in analysing debates in contemporary media environments and to shed light on the dialogical dynamics around the discussions. 相似文献
Our meta-analytic review investigates how employee participation in democratic enterprises is related to psychological outcomes. We gathered 60 studies through a systematic literature search of quantitative field studies (published between January 1970 and May 2017) and extracted 138 effect sizes related to three indicators of organisational democracy (OD) and 15 psychological outcomes. The overall findings suggest that employees’ individually perceived participation in organisational decision making (IPD) had a stronger relation to job satisfaction (ρ = .25), job involvement/work motivation (ρ = .36), prosocial work behaviours (ρ = .24), civic and democratic behaviours (ρ = .21) and perceived supportive climate (ρ = .44) than the other two OD indicators: structurally anchored employee participation (SAEP) and employee participation in collective ownership (EO). This was not the case for value-based commitment: the relations of SAEP (ρ = .40), EO (ρ = .34), and IPD (ρ = .46) with commitment were nearly equal. Mediation analyses indicated that IPD partially mediated most of the effects of SAEP and EO on the outcomes mentioned. The cross-sectional database and a small number of studies for some of the outcomes are the main limitations of this study. 相似文献
ABSTRACT Alcohol misuse is a common, disabling and costly issue worldwide. Internet-delivered cognitive behavior therapy (ICBT) has the potential to reduce the harms of alcohol misuse, particularly for individuals who are unable or unwilling to access face-to-face therapy. A systematic review was conducted using Medline, CINAHL, EMBASE and PsycINFO databases for all relevant articles published from 1980 to January 2019. Randomized controlled trials (RCTs) were included if (i) an ICBT intervention targeting alcohol misuse was delivered; (ii) participants were aged 18 years or older; and (iii) primary outcomes were quantity of drinking. A qualitative analysis was conducted on the content of the ICBT programs. Fourteen studies met inclusion criteria. Most studies included participants from the general population, while studies conducted within clinic settings with diagnosed individuals were rare. The programs were similar in terms of included modules. Small effects were seen in studies on self-guided ICBT, while therapist-guided ICBT rendered small to large effects. The current review indicates that ICBT has a significant effect in reducing alcohol consumption. Larger studies evaluating ICBT compared to active control groups especially within clinic settings are warranted. 相似文献
ABSTRACTThe purpose was to investigate the psychometric properties of the Insomnia Catastrophizing Scale (ICS) including factorial validity and internal consistency as well as discriminative and convergent validity. Associations with sleep parameters and daytime impairment are also examined. Drawn from a randomly selected sample of the general population, 1615 participants completed a survey on insomnia-related nighttime and daytime symptoms, health outcomes and psychological processes, including the ICS. A one-factor solution was supported for both the nighttime catastrophizing (11 items) and daytime catastrophizing (6 items) subscales. Both subscales displayed high internal consistencies (α > 0.90) and accounted for 59.1–70.1% of the variance. The insomnia disorder group had significantly higher scores than participants without insomnia on the two subscales and on the individual items. Cutoffs were established for both subscales with acceptable sensitivity and specificity. Both subscales displayed adequate convergent validity with measures indexing worry, cognitive pre-sleep arousal and anxiety. The two subscales were also significantly associated with nighttime and daytime insomnia symptoms. The ICS is a reliable and valid scale for the assessment of insomnia-related catastrophizing. Future research is needed to examine the test-retest reliability and treatment sensitivity of the ICS. 相似文献