Impulsivity and Behavior-Dependent Life Events Mediate the Relationship of Reward Sensitivity and Depression,but Not Hypomania,Among at-Risk Adolescents

Both reward sensitivity and impulsivity are related to the development and course of bipolar spectrum disorders (BSDs) and have been implicated in other disorders and negative functional outcomes such as substance abuse, obesity, suicidal behaviors, and risk-taking. Furthermore, according to the transactional component of the Behavioral Approach System (BAS)/reward hypersensitivity theory of BSDs, people with reward hypersensitivity should experience more BAS-relevant events, and thus, are more vulnerable to mood symptoms and episodes via stress generation. Impulsivity may exacerbate stress generation in individuals at risk for BSDs based on exhibiting reward hypersensitivity. The current study examined whether impulsivity explained the generation of stress and subsequent mood symptoms beyond what is explained by reward sensitivity alone. Participants were 131 Moderate BAS and 216 High BAS sensitivity adolescents (M = 18.43 years, SD = 1.40), who completed baseline measures of reward sensitivity and impulsivity, as well as follow-up measures of life events and mood symptoms. Results from linear regression analyses indicated that higher baseline impulsivity predicted behavior-dependent, but not behavior-independent, life events. Furthermore, path analyses suggested that the effect of BAS group on depression symptoms at next follow-up was partly explained via the indirect effect of impulsivity and negative behavior-dependent life events. We did not find these effects for behavior-independent or positive-dependent events or for prediction of hypomanic symptoms. The findings suggest that impulsivity may account for stress generation of negative events that precede depression.     

Maladaptive perfectionism as an intervening variable between psychological control and adolescent depressive symptoms: a three-wave longitudinal study.

Maladaptive perfectionism has been postulated as an intervening variable between psychologically controlling parenting and adolescent internalizing problems. Although this hypothesis has been confirmed in a number of cross-sectional studies, it has not yet been examined from a longitudinal perspective. Findings from this 3-wave longitudinal study show that parental psychological control (as indexed by parent and adolescent reports) at age 15 years predicted increased levels of maladaptive perfectionism 1 year later. Maladaptive perfectionism, in turn, predicted increased levels of adolescent depressive symptoms again 1 year later and acted as a significant intervening variable between parental psychological control at Time 1 and depressive symptoms at Time 3. Multigroup analyses show that the model tested was consistent across gender for paternal psychological control but not for maternal psychological control. Suggestions for future research are outlined.     

Pi on Earth, or Mathematics in the Real World

We explore aspects of an experimental approach to mathematical proof, most notably number crunching, or the verification of subsequent particular cases of universal propositions. Since the rise of the computer age, this technique has indeed conquered practice, although it implies the abandonment of the ideal of absolute certainty. It seems that also in mathematical research, the qualitative criterion of effectiveness, i.e. to reach one’s goals, gets increasingly balanced against the quantitative one of efficiency, i.e. to minimize one’s means/ends ratio. Our story will lead to the consideration of some limit cases, opening up the possibility of proofs of infinite length being surveyed in a finite time. By means of example, this should show that mathematical practice in vital aspects depends upon what the actual world is like.

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The intergenerational transmission of authoritarianism: The mediating role of parental goal promotion

This study examined the intergenerational transmission of adolescent authoritarian submission (Right-Wing Authoritarianism or RWA) and authoritarian dominance (Social Dominance Orientation or SDO). It was hypothesized that the type of goals that parents promote (i.e., conservation versus openness to change and extrinsic versus intrinsic goal promotion) would mediate any direct association between parents’ and adolescents’ authoritarian attitudes. This hypothesis was examined in a sample of middle adolescents and their parents. First, a significant parent–child concordance was found for RWA and SDO. Second, whereas parental RWA predicted parental promotion of conservation goals (rather than openness to change goals) as well as the promotion of extrinsic goals (rather than intrinsic goals), parental SDO predicted parental promotion of extrinsic goals only. Third, process analyses showed that, whereas parental conservation goal promotion mediates the relationship between parent and child RWA, parental extrinsic goal promotion mediates the relationship between parent and child SDO.     

Contaminants and the Path to Salvation: A Study of the Sarvāstivāda Hṛdaya Treatises

The Sa?gītiparyāya is the earliest Sarvāstivāda philosophical text that enumerates a series of contaminants (anu?aya), i.e. innate proclivities, inherited from former births, to do something of usually evil nature. This early list comprises seven such contaminants. As it is the contaminants that lead a worldling (p?thagjana) to doing volitional actions and thus to forming a karmic result (karmavipāka), these contaminants naturally also bear on the path to salvation. The gradual development of the peculiar Sarvāstivādin path to salvation necessitated a gradual refinement and reinterpretation of the original list of seven contaminants. Apart from a mere technical aspect, this reinterpretation also reflects the viewpoint of the Sautrāntika school of Buddhist philosophy on the nature of contaminants, i.e. their acceptance of a latent and an active state of the defilements, vis-à-vis the Vaibhā?ika viewpoint according to whom no such difference exists. Within Sarvāstivāda literature, the H?daya treatises illustrate this philosophical development.     

Geometric analogue of holographic reduced representation

Holographic reduced representations (HRRs) are distributed representations of cognitive structures based on superpositions of convolution-bound n-tuples. Restricting HRRs to n-tuples consisting of ±1, one reinterprets the variable binding as a representation of the additive group of binary n-tuples with addition modulo 2. Since convolutions are not defined for vectors, the HRRs cannot be directly associated with geometric structures. Geometric analogues of HRRs are obtained if one considers a projective representation of the same group in the space of blades (geometric products of basis vectors) associated with an arbitrary n-dimensional Euclidean (or pseudo-Euclidean) space. Switching to matrix representations of Clifford algebras, one can always turn a geometric analogue of an HRR into a form of matrix distributed representation. In typical applications the resulting matrices are sparse, so that the matrix representation is less efficient than the representation directly employing the rules of geometric algebra. A yet more efficient procedure is based on ‘projected products’, a hierarchy of geometrically meaningful n-tuple multiplication rules obtained by combining geometric products with projections on relevant multivector subspaces. In terms of dimensionality the geometric analogues of HRRs are in between holographic and tensor-product representations.     

Understanding sustainability

Proposed solutions to sustainability often bring different economic sectors into conflict; when a sustainable solution for one sector is non-sustainable for another it creates what we call the dilemma of sustainability. A recent example took place in the Columbia Basin of the Pacific Northwest, involving competing notions of sustainability by fisheries and the energy industry. Taking up some ideas of Eger and Lyotard, we criticize the constructivist approach which treats large ecosystems as constructions and the process of resolving conflicts of sustainability as one solely consisting of negotiations involving the trading off of interests. We propose instead to treat such conflict resolution via a Gadamerian-inspired hermeneutics that sees different economic sectors as having different interpretations of sustainability and that aims at common understanding.     

Understanding sustainability

Proposed solutions to sustainability often bring different economic sectors into conflict; when a sustainable solution for one sector is non-sustainable for another it creates what we call the dilemma of sustainability. A recent example took place in the Columbia Basin of the Pacific Northwest, involving competing notions of sustainability by fisheries and the energy industry. Taking up some ideas of Eger and Lyotard, we criticize the constructivist approach which treats large ecosystems as constructions and the process of resolving conflicts of sustainability as one solely consisting of negotiations involving the trading off of interests. We propose instead to treat such conflict resolution via a Gadamerian-inspired hermeneutics that sees different economic sectors as having different interpretations of sustainability and that aims at common understanding.     

Parfit's unified theory of morality

Conclusions Insofar as much of commonsense morality is solely rights-focused, insofar as our commonsense duties to our M-relations often involve comparative and not noncomparative goods, and insofar as commonsense morality is a morality of rule following, to those extents Parfit's claim that commonsense morality is self-defeating does not apply. Furthermore, even if Parfit's claim that morality is self-defeating does have a substantive basis and so we amend M as Parfit recommends, because Parfit's revisions of M fail to move M toward C we will be as far from a unification of M and C as we were at the beginning of the project. In short, although there may be a unity to morality, Parfit has not uncovered it.