Modalising Plurals

There has been very little discussion of the appropriate principles to govern a modal logic of plurals. What debate there has been has accepted a principle I call (NecInc); informally if this is one of those then, necessarily: this is one of those. On this basis Williamson has criticised the Boolosian plural interpretation of monadic second-order logic. I argue against (NecInc), noting that it isn’t a theorem of any logic resulting from adding modal axioms to the plural logic PFO+, and showing that the most obvious formal argument in its favour is question begging. I go on to discuss the behaviour of natural language plurals, motivating a case against (NecInc) by developing a case that natural language plural terms are not de jure rigid designators. The paper concludes by developing a model theory for modal PFO+ which does not validate (NecInc). An Appendix discusses (NecInc) in relation to counterpart theory.     

Perfectionism and Cognitive Factors in Distress and Dysfunction in Children and Adolescents: Introduction to the Special Issue

The current article provides an overview of the papers in this special issue on the role of perfectionism in distress and dysfunction among children and adolescents. To our knowledge, this is the first special issue that is focused specifically on the nature and role of perfectionism in maladjustment among children and adolescents. Themes explored in the papers in this special issue include the relevance of a multidimensional approach when studying perfectionism in children and youth, the association between perfectionism and indices of dysfunctional cognitive and self-evaluative processes, and the role of perfectionism in maladaptive coping and self-regulation. Another key theme addressed is the potential usefulness of cognitive-behavioral interventions for perfectionistic children and adolescents at risk for anxiety and depression. In addition to introducing the papers in the special issue, we provide an overview of the historical antecedents of past research and theory that highlights the role of perfectionism in developmental psychopathology. Case studies illustrating dysfunctional perfectionism in children and adolescents are also provided.     

The Association between Positive Parenting and Externalizing Behavior

The present study examined the role of positive parenting on externalizing behaviors in a longitudinal, genetically informative sample. It often is assumed that positive parenting prevents behavior problems in children via an environmentally mediated process. Alternatively, the association may be due to either an evocative gene-environment correlation, in which parents react to children's genetically-influenced behavior in a positive way, or a passive gene-environment correlation, where parents passively transmit a risk environment and the genetic risk factor for the behavioral outcome to their children. The present study estimated the contribution of these processes in the association between positive parenting and children's externalizing behavior. Positive parenting was assessed via observations at ages 7, 9, 14, 24, and 36 months and externalizing behaviors were assessed through parent report at ages 4, 5, 7, 9, 10, 11, and 12 years. The significant association between positive parenting and externalizing behavior was negative, with children of mothers who showed significantly more positive parenting during toddlerhood having lower levels of externalizing behavior in childhood; however, there was not adequate power to distinguish whether this covariation was due to genetic, shared environmental, or nonshared environmental influences.     

Speaking order predicts memory conformity after accounting for exposure to misinformation

When people discuss their experiences, they can later report seeing things that they never saw, simply because they heard about those things in the discussion. One factor that may contribute to this effect is the order in which people speak; some research has investigated this issue, but it remains unclear whether a relationship exists between memory conformity and speaking order. We explored this question using data from five previous memory conformity experiments. The results provide evidence of an association between speaking order and memory conformity, such that people who spoke first in a discussion were misled less often than people who did not. These results build on previous research by demonstrating that the association could not have been caused by differences in opportunities to be misled. We could not draw conclusions about causality from the exploratory analyses, but ruled out several simple explanations of the results, and considered a variety of social and cognitive mechanisms that might account for the association. Further investigation will be required to tease apart the possible mechanisms that underlie the relationship between speaking order and memory conformity.     

Perfectionistic Automatic Thoughts,Trait Perfectionism,and Bulimic Automatic Thoughts in Young Women

The current research examined the associations among perfectionistic automatic thoughts, trait perfectionism, negative automatic thoughts, and bulimic automatic thoughts. A non-clinical sample of 94 undergraduate women completed the Perfectionism Cognitions Inventory, the Multidimensional Perfectionism Scale, the Automatic Thoughts Questionnaire, and the Bulimic Automatic Thoughts Test. Correlational tests revealed that two automatic thoughts measures (perfectionistic automatic thoughts and negative automatic thoughts) and two trait perfectionism measures (self-oriented and socially prescribed perfectionism) were associated significantly with bulimic automatic thoughts with the strongest association being between perfectionistic automatic thoughts and bulimic automatic thoughts. Regression analyses showed that perfectionistic thoughts predicted unique variance in bulimic thoughts beyond variance attributable to trait perfectionism and negative automatic thoughts. The findings are discussed in terms of the need to incorporate an explicit focus on perfectionistic automatic thoughts into treatment interventions and conceptual models of perfectionism and eating disorders.     

What do our intuitions about the experience machine really tell us about hedonism?

Robert Nozick’s experience machine thought experiment is often considered a decisive refutation of hedonism. I argue that the conclusions we draw from Nozick’s thought experiment ought to be informed by considerations concerning the operation of our intuitions about value. First, I argue that, in order to show that practical hedonistic reasons are not causing our negative reaction to the experience machine, we must not merely stipulate their irrelevance (since our intuitions are not always responsive to stipulation) but fill in the concrete details that would make them irrelevant. If we do this, we may see our feelings about the experience machine becoming less negative. Second, I argue that, even if our feelings about the experience machine do not perfectly track hedonistic reasons, there are various reasons to doubt the reliability of our anti-hedonistic intuitions. And finally, I argue that, since in the actual world seeing certain things besides pleasure as ends in themselves may best serve hedonistic ends, hedonism may justify our taking these other things to be intrinsically valuable, thus again making the existence of our seemingly anti-hedonistic intuitions far from straightforward evidence for the falsity of hedonism.     

An association between the DAT1 polymorphism and smoking behavior in young adults from the National Longitudinal Study of Adolescent Health.

Associations between smoking behavior and polymorphisms in the dopaminergic genes (DAT1 and DRD2) were tested by using within- and between-family measures of allelic transmission in 2,448 young adults from the National Longitudinal Study of Adolescent Health. The 9-repeat allele of the dopamine transporter gene polymorphism (DAT1) was inversely associated with smoking in samples that included all subjects and only those who had initiated smoking, accounting for approximately 1% of the variance. Never smokers and current nonsmokers had an excess transmission of the 9-repeat allele compared with regular smokers, suggesting a protective effect of the 9-repeat allele, which is hypothesized to alter synaptic dopamine levels.     

Perfectionism, and Cognitions, Affect, Self-esteem, and Physiological Reactions in a Performance Situation

The current paper describes the results of an experiment in which 200 students who varied in levels of trait perfectionism performed a laboratory task and then were assessed in terms of levels of state affect, state self-esteem, and state automatic thoughts. Independent variables included task difficulty (high versus moderate level of difficulty) and performance feedback independent of their actual level of performance (positive or negative). Analyses also examined objective levels of performance (i.e., the number of errors on the task) and initial confidence in performance. Analyses showed that the experience of state automatic thoughts involving perfectionism was associated with negative automatic thoughts, negative affective reactions, and lower state self-esteem. Analyses of changes in mood and self-esteem showed generally that participants high in socially prescribed perfectionism had increased levels of dysphoria and anxiety and lower levels of state self-esteem following the experience of negative performance feedback or after having a relatively poor performance. Analyses of the physiological measures found increased systolic blood pressure among self-oriented perfectionists who had poorer performance and among socially prescribed perfectionists who had received negative feedback about their performance. The results for heart-rate changes yielded a less clear pattern, though there was evidence that participants with high socially prescribed perfectionism had increased heart rate if they received negative feedback and were relatively low in confidence. Collectively, these findings illustrate that how perfectionists react in challenging situations varies as a function of actual performance, performance feedback, and feelings of personal efficacy.

Dimensions of Perfectionism, Unconditional Self-Acceptance, and Depression

The current research investigated the associations among dimensions of perfectionism, unconditional self-acceptance, and self-reported depression. A sample of 94 students completed the Multidimensional Perfectionism Scale, the Unconditional Self-Acceptance Questionnaire, and a self-report depression measure. Correlational results indicated that all three trait dimensions of perfectionism (i.e., self-oriented, other-oriented, and socially prescribed perfectionism) were associated negatively with unconditional self-acceptance. Also, as expected, depression was associated with relatively low unconditional self-acceptance. Finally, a path analysis revealed that unconditional self-acceptance mediated the association between socially prescribed perfectionism and depression, and other-oriented perfectionism was found to affect depression only indirectly through its association with low levels of self-acceptance. The findings indicate that perfectionists evaluate themselves in terms of a contingent sense of self-worth, and as such, they are vulnerable to psychological distress when they experience negative events that do not affirm their self-worth.