Optimism and Mental Health in Adolescence: a Prospective Validation Study of the Dutch Life-Orientation Test-Revised (LOT-R-A) for Adolescents

The study aimed to examine the psychometric properties of the Dutch Life Orientation Test-Revised for Adolescents (LOT-R-A), a self-report questionnaire assessing dispositional optimism, and to evaluate the two-factor structure (optimism, pessimism). The LOT-R-A and the questionnaires measuring well-being (MHC-SF-A) and psychological problems (SDQ) were completed by 459 Dutch adolescents (178 boys and 281 girls) between the ages of 11 and 18 years at baseline and 281 adolescents at a four-week follow-up. The results confirmed the two-factor structure (optimism, pessimism) of the LOT-R-A. The findings provided evidence of internal consistency of scores ranging from low to good, and evidence of good test-retest reliability of scores. Further, scores of optimism were cross-sectionally positively associated with scores of positive emotions and well-being and negatively with scores of psychological problems and negative emotions, providing evidence of convergent and divergent validity of optimism scores with emotions, well-being, and psychological problems. Lastly, scores of optimism were prospectively positively associated with scores of well-being and negatively with scores of psychological problems, providing evidence of criterion validity of optimism scores with well-being and psychological problems. Based on these findings it can be concluded that the LOT-R-A is a valid instrument to examine optimism among adolescents. Future research can help to elucidate the role of optimism in mental health interventions and can gather knowledge on how these interventions can be refined to optimally cultivate optimism during the developmental period of adolescence.     

Childhood maltreatment and adulthood proneness to shame and guilt: The mediating role of maladaptive schemas

Motivation and Emotion - The current study aimed to examine the mediating role of early maladaptive schemas (EMSs) in the associations between types of childhood maltreatment and adulthood...     

Class,mass and mereology

LeSniewski’s systems of Ontology and Mereology, considered from a purely formal point of view, possessstriking algebraic parallels, ascan be seen in their respective relations to Boolean algebra. But there are alsoimportant divergences, above all that general Mereology is silent, where Ontology is not, on the existenceof ‘atoms’ (individuals). By employing plural terms, LeSniewski sought to accommodate talk of (distributive)classes, without according these an autonomous ontological status. His logic also – like predicate logic– has no place for mass predication in its raw state. It is argued that reference both to pluralities and tomasses is ineliminable, and that one must therefore separate the grammatical distinction singular/pluralfrom the ontological distinction individual/class/mass. A kind of language, modelled on kiniewski’s, issuggested which enables these distinctions to be held apart and at the same time, building on the work ofRichard Sharvy, allows us to express the most important relationships between individuals, classes andmasses.     

The Numerical Stroop Effect in Primary School Children: A Comparison of Low,Normal, and High Achievers

Sixty-six primary school children were selected, of which 21 scored low on a standardized math achievement test, 23 were normal, and 22 high achievers. In a numerical Stroop experiment, children were asked to make numerical and physical size comparisons on digit pairs. The effects of congruity and numerical distance were determined. All children exhibited congruity and distance effects in the numerical comparison. In the physical comparison, children of all performance groups showed Stroop effects when the numerical distance between the digits was large but failed to show them when the distance was small. Numerical distance effects depended on the congruity condition, with a typical effect of distance in the congruent, and a reversed distance effect in the incongruent condition. Our results are hard to reconcile with theories that suggest that deficits in the automaticity of numerical processing can be related to differential math achievement levels. Immaturity in the precision of mappings between numbers and their numerical magnitudes might be better suited to explain the Stroop effects in children. However, as the results for the high achievers demonstrate, in addition to numerical processing capacity per se, domain-general functions might play a crucial role in Stroop performance, too.     

Leibniz,Whitehead and the Metaphysics of Causation

Medieval Thought: The Western Intellectual Tradition from Antiquity to the Thirteenth Century by Michael Haren Second Edition. Macmillan 1992. Pp. ix + 315.

Being a Philosopher: The History of a Practice by D. W. Hamlyn London and New York: Roudedge 1992. Pp. x + 187. ISBN 0–415–02968–6.

A History of Western Philosophy Vol. 3, Renaissance Philosophy by Brian B. Copenhaver and Charles B. Schmitt Oxford: Oxford University Press, 1992. Pp. 450. Hb £30.00. Pb £8.99.

La Scepsi moderna. Interpretazioni dello scetticismo da Charron a Hume by Gianni Paganini Pp. 528. Cosenza: Edizioni Il Busento 1991. L 60,000.

A History of Modern Political Thought 185 A History of Modern Political Thought, Major Political Thinkers from Hobbes to Marx by Iain Hampsher‐Monk Oxford: Blackwell 1992 Pp. xiii + 609 Paperback, £14.99.

Malebranche and Ideas 189 Malebranche and Ideas by Steven M. Nadler New York: Oxford University Press 1992. Pp. 192. ISBN 0–19–507724–5. £35.00

Kantian Aesthetics Pursued by Anthony Savile Edinburgh University Press: Edinburgh, 1993, ISBN 0–7486–0439–1

Philosophy and Logic in Central Europe from Bolzano to Tarski by Peter Simons Kluwer 1992     

Attentional capture and inattentional blindness

Although we intuitively believe that salient or distinctive objects will capture our attention, surprisingly often they do not. For example, drivers may fail to notice another car when trying to turn or a person may fail to see a friend in a cinema when looking for an empty seat, even if the friend is waving. The study of attentional capture has focused primarily on measuring the effect of an irrelevant stimulus on task performance. In essence, these studies explore how well observers can ignore something they expect but know to be irrelevant. By contrast, the real-world examples above raise a different question: how likely are subjects to notice something salient and potentially relevant that they do not expect? Recently, several new paradigms exploring this question have found that, quite often, unexpected objects fail to capture attention, a phenomenon known as 'inattentional blindness'. This review considers evidence for the effects of irrelevant features both on performance ('implicit attentional capture') and on awareness ('explicit attentional capture'). Taken together, traditional studies of implicit attentional capture and recent studies of inattentional blindness provide a more complete understanding of the varieties of attentional capture, both in the laboratory and in the real world.     

Unskilled and optimistic: Overconfident predictions despite calibrated knowledge of relative skill

Those who are less skilled tend to overestimate their abilities more than do those who are more skilled—the so-called Dunning–Kruger effect. Less-skilled performers presumably have less of the knowledge needed to make informed guesses about their relative performance. If so, the Dunning–Kruger effect should vanish when participants do have access to information about their relative ability and performance. Competitive bridge players predicted their results for bridge sessions before playing and received feedback about their actual performance following each session. Despite knowing their own relative skill and showing unbiased memory for their performance, they made overconfident predictions consistent with a Dunning–Kruger effect. This bias persisted even though players received accurate feedback about their predictions after each session. The finding of a Dunning–Kruger effect despite knowledge of relative ability suggests that differential self-knowledge is not a necessary precondition for the Dunning–Kruger effect. At least in some cases, the effect might reflect a different form of irrational optimism.     

Health-Related Quality of Life and Perceived Need for Mental Health Services in Adolescent Solid Organ Transplant Recipients

The purpose of the current investigation was to assess interest in mental health services among parents of adolescent solid organ transplant recipients and the relationship between parent perceived need for mental health services and patient health-related quality of life (HRQOL). Sixty-three parents rated interest in receiving 10 mental health services, and patient HRQOL ratings were gathered from adolescent transplant recipients and their parents. Ninety-four percent of parents expressed some level of interest in at least one of the proposed services, with over 40 % indicating maximum interest. Parents’ perceived need for mental health services was inversely related to adolescent and parent reports of HRQOL on the behavior, mental health, family cohesion, and parental impact-emotional domains. Results suggest that parents of adolescent solid organ transplant recipients are interested in receiving mental health services for their families. Assessment of need for mental health services and HRQOL may inform the medical team of families requiring intervention.     

Changes are not localized before they are explicitly detected

Change detection is in many ways analogous to visual search. Yet, unlike search, successful detection depends not on the salience of features within a scene, but on the difference between the original and modified scene. If, as in search, pre-attentive mechanisms guide attention to the change location, the change itself must produce a preattentively detectable signal. Despite recent evidence for implicit representation of change in the absence of conscious detection, few studies have yet explored whether attention is guided to a change location prior to explicit detection. In four “change blindness” experiments using several variants of the “flicker” task, we tested the hypothesis that implicit or preattentive mechanisms guide change localization prior to explicit detection. None of the experiments revealed improved localization of changes prior to explicit reports of detection, suggesting that implicit detection of change does not contribute to the eventual explicit localization of a change. Instead, change localization is essentially arbitrary, driven by the salience of features within scenes.     

Recruiting through advertising or employee referrals: Costs,yields, and the effects of geographic focus

Research on recruiting has generally considered the effects of recruiting source on employee tenure or performance, and has argued that formal employment ads are inferior to informal sources, notably employee referrals. We test two dimensions for evaluating the effects of recruiting sources on the recruiting process—cost per new hire and yield ratio. We also suggest a new dimension for distinguishing between different types of employment ads—geographical focus—which we define as the clarity and distinctiveness of the labour market that an ad is likely to reach. Geographically focused ads are shown to cost less and yield more appropriate applicants than unfocused ads. Considering the cost, yield, and focus of ads can promote the effectiveness of recruiting processes. The study therefore has both practical applications and implications for further research on recruiting sources.