Reasoning with quantifiers

In the semantics of natural language, quantification may have received more attention than any other subject, and one of the main topics in psychological studies on deductive reasoning is syllogistic inference, which is just a restricted form of reasoning with quantifiers. But thus far the semantical and psychological enterprises have remained disconnected. This paper aims to show how our understanding of syllogistic reasoning may benefit from semantical research on quantification. I present a very simple logic that pivots on the monotonicity properties of quantified statements--properties that are known to be crucial not only to quantification but to a much wider range of semantical phenomena. This logic is shown to account for the experimental evidence available in the literature as well as for the data from a new experiment with cardinal quantifiers ("at least n" and "at most n"), which cannot be explained by any other theory of syllogistic reasoning.     

A longitudinal and multi-method examination of interest–occupation congruence within and across time

Remarkably little research has addressed change and stability in person–environment fit across time. The objective of the current study was to address this gap in the literature by investigating Holland interest–occupation congruence across time for a sample of college alumni (N = 167) that were tracked during the first third of their professional career. Congruence was examined in all its complexity, including a repeated assessment of both occupations and interests, the use of objective (O*NET) and subjective (self-report) environment assessment methods, and adopting sophisticated congruence calculation methods (i.e., Euclidean distance and profile correlation). This resulted in a total of 12 interest–occupation comparisons within and across time that could be related to general and career specific well-being. The results first indicated moderate levels of stability in interests and occupations across the 15-year time interval, yet also with room for change. Congruence analyses indicated significant interest–occupation fit at the beginning of the career and 15 years later, with the magnitude of congruence slightly varying depending on which occupation assessment and which congruence method was used. Profile correlation congruence did not change over time in absolute terms and evidenced relative stability. Euclidean distance indices had little relative stability over time but did manifest some absolute changes in levels of congruence. Finally, job change moderated the association between interest–occupation congruence and life satisfaction in such a way that higher levels of satisfaction were reported only when little job change was present.     

Evaluating Arguments Based on Toulmin’s Scheme

Toulmin’s scheme for the layout of arguments (1958, The Uses of Argument, Cambridge University Press, Cambridge) represents an influential tool for the analysis of arguments. The scheme enriches the traditional premises-conclusion model of arguments by distinguishing additional elements, like warrant, backing and rebuttal. The present paper contains a formal elaboration of Toulmin’s scheme, and extends it with a treatment of the formal evaluation of Toulmin-style arguments, which Toulmin did not discuss at all. Arguments are evaluated in terms of a so-called dialectical interpretation of their assumptions. In such an interpretation, an argument’s assumptions can be evaluated as defeated, e.g., when there is a defeating reason against the assumption. The present work builds on recent research on defeasible argumentation (cf. e.g. the work of Pollock, Reiter, Loui, Vreeswijk, Prakken, Hage and Dung). More specifically, the author’s work on the dialectical logic DEFLOG and the argumentation tool ARGUMED serve as starting points.     

Phenotypes of sleeplessness: stressing the need for psychodiagnostics in the assessment of insomnia

Insomnia is a too general term for various subtypes that might have different etiologies and therefore require different types of treatment. In this explorative study we used cluster analysis to distinguish different phenotypes in 218 patients with insomnia, taking into account several factors including sleep variables and characteristics related to personality and psychiatric comorbidity. Three clusters emerged from the analysis. The ‘moderate insomnia with low psychopathology’-cluster was characterized by relatively normal personality traits, as well as normal levels of anxiety and depressive symptoms in the presence of moderate insomnia severity. The ‘severe insomnia with moderate psychopathology’-cluster showed relatively high scores on the Insomnia Severity Index and scores on the sleep log that were indicative for severe insomnia. Anxiety and depressive symptoms were slightly above the cut-off and they were characterized by below average self-sufficiency and less goal-directed behavior. The ‘early onset insomnia with high psychopathology’-cluster showed a much younger age and earlier insomnia onset than the other two groups. Anxiety and depressive symptoms were well above the cut-off score and the group consisted of a higher percentage of subjects with comorbid psychiatric disorders. This cluster showed a ‘typical psychiatric’ personality profile. Our findings stress the need for psychodiagnostic procedures next to a sleep-related diagnostic approach, especially in the younger insomnia patients. Specific treatment suggestions are given based on the three phenotypes.     

Value Priorities and Organ Donation in Young Adults

This research identifies major personal values among American university students that predict organ-donation registration with the Department of Motor Vehicles. Participants responded to a factual test of their knowledge about organ donation, indicated whether or not they had registered as posthumous donors, and filled out a personality inventory measuring their personal values (Schwartz, 1992, 1994). The data indicated a high level of factual knowledge about organ donation; and the greater the level of knowledge, the more likely participants were registered to donate their organs. Also, participants higher in benevolence, universalism, achievement, and stimulation were more likely to have registered to donate their organs. The results are discussed in terms of the need to develop more effective health-communication campaigns by using specific health-education messages tailored to students majoring in different disciplines or to people in various occupations as a means of increasing their willingness to donate.     

Tuberculosis detection by giant african pouched rats

In recent years, operant discrimination training procedures have been used to teach giant African pouched rats to detect tuberculosis (TB) in human sputum samples. This article summarizes how the rats are trained and used operationally, as well as their performance in studies published to date. Available data suggest that pouched rats, which can evaluate many samples quickly, are sufficiently accurate in detecting TB to merit further investigation as a diagnostic tool.     

The effects of process and outcome accountability on judgment process and performance

This article challenges the view that it is always better to hold decision makers accountable for their decision process rather than their decision outcomes. In three multiple-cue judgment studies, the authors show that process accountability, relative to outcome accountability, consistently improves judgment quality in relatively simple elemental tasks. However, this performance advantage of process accountability does not generalize to more complex configural tasks. This is because process accountability improves an analytical process based on cue abstraction, while it does not change a holistic process based on exemplar memory. Cue abstraction is only effective in elemental tasks (in which outcomes are a linear additive combination of cues) but not in configural tasks (in which outcomes depend on interactions between the cues). In addition, Studies 2 and 3 show that the extent to which process and outcome accountability affect judgment quality depends on individual differences in analytical intelligence and rational thinking style.     

Modelling relations between sensory processing, speech perception, orthographic and phonological ability, and literacy achievement

The general magnocellular theory postulates that dyslexia is the consequence of a multimodal deficit in the processing of transient and dynamic stimuli. In the auditory modality, this deficit has been hypothesized to interfere with accurate speech perception, and subsequently disrupt the development of phonological and later reading and spelling skills. In the visual modality, an analogous problem might interfere with literacy development by affecting orthographic skills. In this prospective longitudinal study, we tested dynamic auditory and visual processing, speech-in-noise perception, phonological ability and orthographic ability in 62 five-year-old preschool children. Predictive relations towards first grade reading and spelling measures were explored and the validity of the global magnocellular model was evaluated using causal path analysis. In particular, we demonstrated that dynamic auditory processing was related to speech perception, which itself was related to phonological awareness. Similarly, dynamic visual processing was related to orthographic ability. Subsequently, phonological awareness, orthographic ability and verbal short-term memory were unique predictors of reading and spelling development.     

Of Seeds and Sprouts: Defilement and its Attachment to the Life-stream in the Sarvāstivāda H[rdot]daya Treatises

The notions of selflessness (anātmaka) and karman are two key concepts in Buddhist philosophy. The question how karman functions with respect to the rebirth of a worldling who is, actually, devoid of a self, was a major philosophical issue in early Buddhist doctrine. Within the Sarvāstivāda school, the Vaibhā[sdot]ikas became the representative of an interpretation of this problem that hinges on the notion of ‘possession’ (prāpti). Their theory was contradicted by the Sautrāntikas, whose interpretation is based on the notion of ‘seed’ (bīja). The Sarvāstivāda H[rdot]daya treatises, compiled in a time period spanning from the beginning of the common era to the fourth century AD, i.e. the period of the rise of the Sautrāntika school, are a particularly interesting set of works, as they reflect the gradual development of these two major theories.     

Effects of category learning on the stimulus selectivity of macaque inferior temporal neurons

Primates can learn to categorize complex shapes, but as yet it is unclear how this categorization learning affects the representation of shape in visual cortex. Previous studies that have examined the effect of categorization learning on shape representation in the macaque inferior temporal (IT) cortex have produced diverse and conflicting results that are difficult to interpret owing to inadequacies in design. The present study overcomes these issues by recording IT responses before and after categorization learning. We used parameterized shapes that varied along two shape dimensions. Monkeys were extensively trained to categorize the shapes along one of the two dimensions. Unlike previous studies, our paradigm counterbalanced the relevant categorization dimension across animals. We found that categorization learning increased selectivity specifically for the category-relevant stimulus dimension (i.e., an expanded representation of the trained dimension), and that the ratio of within-category response similarities to between-category response similarities increased for the relevant dimension (i.e., category tuning). These small effects were only evident when the learned category-related effects were disentangled from the prelearned stimulus selectivity. These results suggest that shape-categorization learning can induce minor category-related changes in the shape tuning of IT neurons in adults, suggesting that learned, category-related changes in neuronal response mainly occur downstream from IT.