Comparative study of hostility in depressive patients with and without a suicide attempt history

Hostility in association with depression seems to be connected to suicidal behavior. This study aimed to evaluate hostility and its dimensions in relation to depression in patients who suffered from diagnosed depression with and without a suicide attempt history. The study included 168 participants; 58 patients with depression and suicide attempt history, 55 patients with depression without a suicide attempt history and 55 healthy controls. Hostility was assessed with the Hostility and Direction of Hostility Questionnaire, while depression with the Beck Depression Inventory (BDI). Patients with depression and a suicide attempt history compared with the patients without attempt history presented statistically significantly higher total hostility (28.71 ± 6.43 vs 24.20 ± 7.66), extroverted hostility (17.16 ± 4.37 vs 14.15 ± 4.63), acting out hostility (6.03 ± 2.09 vs 4.73 ± 1.93), and self criticism (6.95 ± 2.12 vs 5.89 ± 2.32). No statistically significant differences were found between the two clinical groups in depression according to the BDI. Moreover depressive patients with suicide attempt history scored higher in all the hostility dimensions than the controls. Therefore, it could be suggested that hostility and especially its extrapunitive dimensions are associated with suicidal behavior, since no differences in depression were recorded between the two clinical groups.     

Anxiety and depression in Greek nursing and medical personnel

The relatively low number of nurses compared to physicians in Greece and the few available studies on the psychological problems of the health professionals led to comparison of anxiety and depression for 76 Greek nursing personnel (20 men, M age: 32.8 yr., SD: 3.8 yr., and 56 women, M age: 36.6 yr., SD: 7.7 yr.) and 66 doctors (35 men, M age: 35.9 yr., SD: 8.9 yr. and 31 women, M age: 32.7 yr., SD: 8.1 yr.) using validated translations of the Spielberger State-Trait Anxiety Inventory and the Beck Depression Inventory. Male nurses had the lowest scores on trait anxiety, while female doctors had the highest scores, followed by female nurses. Depression scores were not different between doctors and nurses, regardless of sex. Age and depression scores were positively correlated (Spearman rho = .31) only for the female nurses. The findings suggest that interventions for diagnosis and stress management in the health-care workplace should be equally targeted for nursing and medical personnel.     

Implicit training of nonnative speech stimuli

Learning nonnative speech contrasts in adulthood has proven difficult. Standard training methods have achieved moderate effects using explicit instructions and performance feedback. In this study, the authors question preexisting assumptions by demonstrating a superiority of implicit training procedures. They trained 3 groups of Greek adults on a difficult Hindi contrast (a) explicitly, with feedback (Experiment 1), or (b) implicitly, unaware of the phoneme distinctions, with (Experiment 2) or without (Experiment 3) feedback. Stimuli were natural recordings of consonant-vowel syllables with retroflex and dental unvoiced stops by a native Hindi speaker. On each trial, participants heard pairs of tokens from both categories and had to identify the retroflex sounds (explicit condition) or the sounds differing in intensity (implicit condition). Unbeknownst to participants, in the implicit conditions, target sounds were always retroflex, and distractor sounds were always dental. Post-training identification and discrimination tests showed improved performance of all groups, compared with a baseline of untrained Greek listeners. Learning was most robust for implicit training without feedback. It remains to be investigated whether implicitly trained skills can generalize to linguistically relevant phonetic categories when appropriate variability is introduced. These findings challenge traditional accounts on the role of feedback in phonetic training and highlight the importance of implicit, reward-based mechanisms.     

Societal and individualistic drivers as predictors of organic purchasing revealed through a portrait value questionnaire (PVQ)‐based inventory

• The Schwartz's Portrait Value Questionnaire (PVQ) has extensively been used in personal values research. The present survey validates and tests in a value‐based segmentation task a 17‐item PVQ‐based inventory that includes consumer values related to organic food purchasing, using a nationally representative sample of 1043 Greek consumers. The main assumption of the survey is that consumer segments that place more emphasis on specific organic food‐related values would present different magnitude of beliefs and purchasing behaviour towards organic products. Two 2nd‐order value factors (named ‘individualistic’ and ‘societal’, respectively) emerged from exploratory and confirmatory factor analyses comprising 14 out of the initial 17 PVQ values. In the next phase of the analysis, hierarchical clustering was implemented based on those factors. Through the clusters emerged, a clear relation between consumers' ‘societal’ (universalism and benevolence) value similarity, higher frequency of organic purchasing and higher likelihood of organic‐related beliefs was clearly identified. This fact supports the applicability of the PVQ typology in predicting consumer behaviour in various product contexts.

Copyright © 2008 John Wiley & Sons, Ltd.     

Reference,perception, and attention

I examine John Campbell’s claim that the determination of the reference of a perceptual demonstrative requires conscious visual object-based selective attention. I argue that although Campbell’s claim to the effect that, first, a complex binding parameter is needed to establish the referent of a perceptual demonstrative, and, second, that this referent is determined independently of, and before, the application of sortals is correct, this binding parameter does not require object-based attention for its construction. If object-based attention were indeed required then the determination of the referent would necessarily involve the application of sortal concepts, since object-based attention initiates top-down cognitive effects on visual processing. I also examine Mohan Matthen’s claim that reference to objects is established only through the visual processing in the dorsal visual stream and argue that although it is true that processing in the dorsal stream can determine reference, a thesis that goes against Campbell’s view that the determination of the referent requires conscious attention, processing along the ventral visual stream can also establish the reference of perceptual demonstratives. It also claim that Matthen’s account of dorsal processing underestimates the kind of information processed along the dorsal stream and this has some implications regarding perceptual demonstratives reference fixing.

Unattended exposure to components of speech sounds yields same benefits as explicit auditory training

Learning a second language as an adult is particularly effortful when new phonetic representations must be formed. Therefore the processes that allow learning of speech sounds are of great theoretical and practical interest. Here we examined whether perception of single formant transitions, that is, sound components critical in speech perception, can be enhanced through an implicit task-irrelevant learning procedure that has been shown to produce visual perceptual learning. The single-formant sounds were paired at subthreshold levels with the attended targets in an auditory identification task. Results showed that task-irrelevant learning occurred for the unattended stimuli. Surprisingly, the magnitude of this learning effect was similar to that following explicit training on auditory formant transition detection using discriminable stimuli in an adaptive procedure, whereas explicit training on the subthreshold stimuli produced no learning. These results suggest that in adults learning of speech parts can occur at least partially through implicit mechanisms.     

Smoking related to anxiety and depression in Greek medical staff

We assessed the relation of anxiety and depression to smoking behavior in a sample of 80 physicians and surgeons, using the Spielberger State-Trait Anxiety Scale and the Beck Depression Inventory. 27 doctors were nonsmokers, 14 were former smokers, and 39 were current smokers. Current smokers showed significantly higher Anxiety and Depression scores compared to nonsmokers and former smokers, while the latter presented significantly lower Anxiety scores than nonsmokers. In current smokers, the daily quota of cigarettes was not correlated with Anxiety or Depression scores. From our results we can hypothesize that, among medical staff, smoking behavior is more anxiety-related than depression-related. In conclusion, we believe that interventions such as stress management techniques could be effective in lessening Anxiety and diminishing the need for relief searched for in smoking.     

Is perception informationally encapsulated? The issue of the theory‐ladenness of perception

Fodor has argued that observation is theory neutral, since the perceptual systems are modular, that is, they are domain-specific, encapsulated, mandatory, fast, hard-wired in the organism, and have a fixed neural architecture. Churchland attacks the theoretical neutrality of observation on the grounds that (a) the abundant top-down pathways in the brain suggest the cognitive penetration of perception and (b) perceptual learning can change in the wiring of the perceptual systems. In this paper I introduce a distinction between sensation, perception, and observation and I argue that although Churchland is right that observation involves top-down processes, there is also a substantial amount of information in perception which is theory-neutral. I argue that perceptual learning does not threaten the cognitive impenetrability of perception, and that the neuropsychological research does not provide evidence in favor of the top-down character of perception. Finally, I discuss the possibility of an off-line cognitive penetrability of perception.     

Aspects of analytic deduction

Let ? be the ordinary deduction relation of classical first-order logic. We provide an “analytic” subrelation ?³ of ? which for propositional logic is defined by the usual “containment” criterion $$\Gamma \vdash ^a \varphi iff \Gamma \vdash \varphi and Atom(\varphi ) \subseteq Atom(\Gamma ),$$ whereas for predicate logic, ?^a is defined by the extended criterion $$\Gamma \vdash ^a \varphi iff \Gamma \vdash \varphi and Atom(\varphi ) \subseteq ' Atom(\Gamma ),$$ where Atom(?) $ \subseteq '$ Atom(Γ) means that every atomic formula occurring in ? “essentially occurs” also in Γ. If Γ, ? are quantifier-free, then the notions “occurs” and “essentially occurs” for atoms between Γ and ? coincide. If ? is formalized by Gentzen's calculus of sequents, then we show that ?^a is axiomatizable by a proper fragment of analytic inference rules. This is mainly due to cut elimination. By “analytic inference rule” we understand here a rule r such that, if the sequent over the line is analytic, then so is the sequent under the line. We also discuss the notion of semantic relevance as contrasted to the previous syntactic one. We show that when introducing semantic sequents as axioms, i.e. when extending the pure logical axioms and rules by mathematical ones, the property of syntactic relevance is lost, since cut elimination no longer holds. We conclude that no purely syntactic notion of analytic deduction can ever replace successfully the complex semantico-syntactic deduction we already possess.     

Cardinality without Enumeration

We show that the notion of cardinality of a set is independent from that of wellordering, and that reasonable total notions of cardinality exist in every model of ZF where the axiom of choice fails. Such notions are either definable in a simple and natural way, or non-definable, produced by forcing. Analogous cardinality notions exist in nonstandard models of arithmetic admitting nontrivial automorphisms. Certain motivating phenomena from quantum mechanics are also discussed in the Appendix.