Prevalence of Personality Disorders at Midlife in a Community Sample: Disorders and Symptoms Reflected in Interview,Self, and Informant Reports

This report is concerned with the prevalence of symptoms of specific personality disorders in a representative community sample and draws attention to the importance of different sources of diagnostic information. We recruited a sample of 1,630 people between the ages of 55 and 64 to participate in a study regarding personality and health. Using careful recruitment methods, our participation rate was 43 %. Participants completed the SIDP-IV interview as well as a questionnaire (self-report MAPP). Informants completed the same questionnaire (informant MAPP), describing the participant’s maladaptive personality characteristics. According to the diagnostic interview, 7 % of participants met criteria for exactly one PD, 1 % met criteria for 2 or 3 PDs, and 2 % met criteria for PD NOS (defined as 10 or more miscellaneous criteria). Avoidant and obsessive compulsive PDs were the most common types. Correlations between the three sources of information indicated significant agreement among these measurement methods, but they are not redundant. In comparison to interview and self-report data, informants reported more symptoms of personality pathology (except for avoidant PD). Symptoms of personality pathology are continuously distributed, and subthreshold features may have an important impact on health and social adjustment. In this community sample, rates of co-morbidity among PDs and the proportion of PDNOS diagnoses are substantially lower than reported from clinical samples. Future research must evaluate the validity of diagnostic thresholds and competing sources of diagnostic information in relation to important life outcomes.     

Valuation Semantics for First-Order Logics of Evidence and Truth

This paper introduces the logic QLET_F, a quantified extension of the logic of evidence and truth LET_F, together with a corresponding sound and complete first-order non-deterministic valuation semantics. LET_F is a paraconsistent and paracomplete sentential logic that extends the logic of first-degree entailment (FDE) with a classicality operator ∘ and a non-classicality operator ∙, dual to each other: while ∘A entails that A behaves classically, ∙A follows from A’s violating some classically valid inferences. The semantics of QLET_F combines structures that interpret negated predicates in terms of anti-extensions with first-order non-deterministic valuations, and completeness is obtained through a generalization of Henkin’s method. By providing sound and complete semantics for first-order extensions of FDE, K3, and LP, we show how these tools, which we call here the method of anti-extensions + valuations, can be naturally applied to a number of non-classical logics.

     

The influence of the visual surrounding environment in older adults and young adults’ cognitive performance: an alternative paradigm

ABSTRACT

This study investigated how the characteristics of the visual surrounding environment influence older- and young-adults’ cognitive performance. Sixty-four older adults and 64 young adults performed four visual cognitive tasks (attention and memory tasks) in two independent sessions while being exposed to a high-load and a low-load visual surrounding environment. We expected that the high-load environment would hurt the older-adults performance due to typical difficulties in ignoring irrelevant stimuli, whereas no such effect would likely occur for the young-adults whose cognitive abilities are at their best. Overall, our results were consistent with our prediction in three tasks (go/no-go, choice reaction time, and Corsi block-tapping). Additionally, the older adults performed worse than the young adults in all tasks, thus confirming expected age-related differences. Our results are consistent with those obtained when distractors and targets are presented in the same display, now using a paradigm which locates the distractors in the surrounding environment.