Decision-making in healthy children, adolescents and adults explained by the use of increasingly complex proportional reasoning rules

In the standard Iowa Gambling Task (IGT), participants have to choose repeatedly from four options. Each option is characterized by a constant gain, and by the frequency and amount of a probabilistic loss. Crone and van der Molen (2004) reported that school-aged children and even adolescents show marked deficits in IGT performance. In this study, we have re-analyzed the data with a multivariate normal mixture analysis to show that these developmental changes can be explained by a shift from unidimensional to multidimensional proportional reasoning (Siegler, 1981; Jansen & van der Maas, 2002). More specifically, the results show a gradual shift with increasing age from (a) guessing with a slight tendency to consider frequency of loss to (b) focusing on frequency of loss, to (c) considering both frequency and amount of probabilistic loss. In the latter case, participants only considered options with low-frequency loss and then chose the option with the lowest amount of loss. Performance improved in a reversed task, in which punishment was placed up front and gain was delivered unexpectedly. In this reversed task, young children are guessing with already a slight tendency to consider both the frequency and amount of gain; this strategy becomes more pronounced with age. We argue that these findings have important implications for the interpretation of IGT performance, as well as for methods to analyze this performance.     

Rule transition on the balance scale task: a case study in belief change

For various domains in proportional reasoning cognitive development is characterized as a progression through a series of increasingly complex rules. A multiplicative relationship between two task features, such as weight and distance information of blocks placed at both sides of the fulcrum of a balance scale, appears difficult to discover. During development, children change their beliefs about the balance scale several times: from a focus on the weight dimension (Rule I) to occasionally considering the distance dimension (Rule II), guessing (Rule III), and applying multiplication (Rule IV; Siegler, 1981). Because of the detailed empirical findings the balance scale task has become a benchmark task for computational models of proportional reasoning. In this article, we present a large empirical study (N = 420) of which the findings provide a challenge for computational models. The effect of feedback and the effect of individually adapted training items on rule transition were tested for children using Rule I or Rule II. Presenting adapted training items initiates belief revision for Rule I but not for Rule II. The experience of making mistakes (by providing feedback) induces a change for both Rule I and Rule II. However, a delayed posttest shows that these changes are preserved after 2 weeks only for children using Rule I. We conclude that the transition from Rule I to Rule II differs from the transition from Rule II to a more complex rule. Concerning these empirical findings, we will review performance of computational models and the implications for a future belief revision model.

It is one Thing, to show a Man that he is in an Error, and another, to put him in possession of Truth. John Locke

     

Laterality in metaphor processing: lack of evidence from functional magnetic resonance imaging for the right hemisphere theory

We investigated processing of metaphoric sentences using event-related functional magnetic resonance imaging (fMRI). Seventeen healthy subjects (6 female, 11 male) read 60 novel short German sentence pairs with either metaphoric or literal meaning and performed two different tasks: judging the metaphoric content and judging whether the sentence has a positive or negative connotation. Laterality indices for 8 regions of interest were calculated: Inferior frontal gyrus (opercular part and triangular part), superior, middle, and inferior temporal gyrus, precuneus, temporal pole, and hippocampus. A left lateralised network was activated with no significant differences in laterality between the two tasks. The lowest degree of laterality was found in the temporal pole. Other factors than metaphoricity per se might trigger right hemisphere recruitment. Results are discussed in the context of lesion and hemifield studies.     

The group as a resource: reducing biased attributions for group success and failure via group affirmation

Self-affirmation theory proposes that people can respond to threats to the self by affirming alternative sources of self-integrity, resulting in greater openness to self-threatening information. The present research examines this at a group level by investigating whether a group affirmation (affirming an important group value) increases acceptance of threatening group information among sports teams and fans. In Study 1, athletes exhibited a group-serving attributional bias, which was eliminated by the group affirmation. In Study 2, the most highly identified fans exhibited the most bias in terms of their attributions, and this bias was eliminated by the group affirmation. These studies suggest that groups can serve as resources from which people can draw in response to threatening group events.     

Susceptibility to semantic illusions: An individual-differences perspective

When askedHow many animals of each kind did Moses take on the ark?, people frequently respond “two” even though they know it was Noah, not Moses, who took animals on the ark. We replicate previous research by showing that susceptibility to semantic illusions is influenced by the semantic relatedness of both the impostor word and the surrounding context. However, we also show that the two text manipulations make independent contributions to semantic illusions, and we propose two individual-differences mechanisms that might underlie these two effects. We propose that the ability to resist the lure of a semantically related impostor word is related to the individual’s skill at accessing and reasoning about knowledge from long-term memory. And we propose that the ability to resist the lure of the surrounding sentential context is related to the individual’s capacity to simultaneously process and store information in working memory.     

FORGETTING AND THE TASK OF SEEING: Ordinary Oblivion,Plato, and Ethics

The gaps, fissures, and lapses of attention in a life—what I call “ordinary oblivions”—are fertile fragilities that present a compelling source for ethics. Plato, not Aristotle, is the ancient philosopher specially poised to speak to this feature of human life. Drawing upon poet C. K. Williams's idea that forgetting is a “looking away” that makes possible “beginning again,” I present a Platonic approach to ethics as an alternative to Aristotelian or virtue ethics. Plato's Phaedrus is a key source text for this alternate picture; from it I suggest how we might construe Iris Murdoch's “task of seeing” in terms of the engagement with written form. Poetry is a central locale for such engagement, and thus suggests a kind of ethical praxis that arises from the theoretical emphases of my examination of forgetting, the unmoored self, remade other‐regard, and sacred sources.     

LINKAGES BETWEEN WOMEN'S PROVIDER-ROLE ATTITUDES, PSYCHOLOGICAL WELL-BEING, AND FAMILY RELATIONSHIPS

The primary aim of this investigation was to examine the extent to which the meanings women attach to their provider-role responsibilities are differentially related to their psychological well-being and family relationships and to the division of labor in the home. The sample included 43 dualearner and 50 single-earner families. In home interviews, wives reported on role overload, depression, satisfaction with the marriage, and attitudes regarding women's and men's roles. Their children completed two measures assessing daily hassles and their relationship with their mother. Reports of daily involvement in household work were obtained from wives and husbands during four telephone interviews. Discriminant function analyses indicated that aspects of women's psychological well-being and marital and parent-child relationships and of the division of labor discriminated women in four different provider groups: maidsecondary providers, ambivalent coproviders, coproviders, and homemakers. Wives who were ambivalent about their provider responsibilities tended to report higher levels of depression and overload and significantly lower marital satisfaction. Wives who saw their employment as secondary to that of their husbands reported relatively higher levels of depression and overload but also the highest levels of marital satisfaction.     

Psychosocial correlates of eczema in a non-treatment-seeking population

Data from the Vietnam Experience Study were used to examine psychosocial correlates of eczema. Based upon the results of dermatologic examinations, three groups of male veterans were identified: (a) subjects with eczema (n = 80), (b) subjects with tinea (n = 282), and (c) subjects with no medical diagnosis (n = 176). These three groups were compared on measures of anxiety, depression, hostility, and social support. The Diagnostic Interview Schedule (Version III-A) was used to determine diagnoses of anxiety and depression and level of social support. MMPI Scales 2 and 7, the Wiggins content scale of Depression, and the Cook-Medley Hostility Scale were used to assess anxiety, depression, and hostility. Eczema subjects did not differ from tinea or no-disease control groups on dependent measures. These results are contrasted with previous studies of treatment-seeking patients, which showed greater prevalence of anxiety and depression among individuals with eczema. Directions for future research are suggested.This paper is taken from the first author's dissertation.     

Gender differences in depressive response: The role of social support

The present study investigated the possibility that women's ruminative response style to stressful events is due in part to differential advice that women and men receive from their social support networks. Undergraduates (60 men, 136 women) of various ethnic backgrounds (e.g., 21.4% English, 16.8% West Indian, 12.8% Chinese, 10.7% Italian) indicated the extent to which they would endorse various statements of advice for a stimulus person described as experiencing a negative life event. As predicted, subjects endorsed more ruminative advice for female stimulus persons than for male stimulus persons (p< .02). These findings imply that, since females in stressful situations seem more likely to receive ruminative advice than do their male counterparts, women's greater vulnerability to depressive symptoms may be partly the result of the concomitant dangers of stressful events and potentially harmful advice.