Chronometric explorations of disordered minds

Patients with borderline personality disorder have unstable emotions, difficulty maintaining relationships and a high probability of self-inflicted damage. A recent experiment of Posner et al. that measured reaction-time differences derived from a simple task, revealed that alerting and orienting is normal in these patients. By contrast, and perhaps at the root of this personality disorder, the module responsible for cognitive conflict resolution is defective.     

Computational explorations of perceptual symbol systems theory

The aim of this paper is twofold. First, we provide a methodological pathway from theories of situated, embodied cognition to simulations with an eye to empirical evidence, and suggest a possible cross-fertilization between cognitive robotics and psychology. Psychological theories, in particular those formulated at an abstract level, include models which are often severely underspecified at the level of mechanisms. This is true in the synchronic, constructive perspective (how can the effects observed in experiments be concretely generated by the model's mechanisms?) and in the diachronic, developmental perspective (how can such mechanisms be learned and developed?). The synthetic method of artificial cognitive systems research, and in particular of cognitive robotics, can complement research in psychology (and neurosciences) by exploring the constructive and developmental aspects of theories. Our second aim is to provide an example of such a methodology by describing simulations aiming at developing a perceptual symbol system (PSS) (Barsalou, 1999). We then describe the two main theoretical constructs of the PSS, perceptual symbols and simulators, illustrate their development in an artificial system, and test the system in prediction, categorization, and abstraction tasks.     

Cognitive dysfunction in compulsive checkers: Further explorations

Recent evidence suggests a relationship between certain memory deficits and compulsive-checking behavior. The present study explores this relationship in the context of several additional memory capacities not yet investigated. Using the Maudsley Obsessional-Compulsive Inventory and the Everyday Checking Behavior Scale four groups of Ss were identified: (1) frequent checkers, (2) occasional checkers, (3) infrequent checkers and (4) noncheckers. Consistent with previous research, a memory-for-actions task indicated a deficit among compulsive checkers. Furthermore, checking status was found to be negatively related to memory functioning as measured by the Wechsler Memory Scale (WMS) and the Cognitive Failures Questionnaire (CFQ). This memory deficit was most pronounced on the Logical Memory subtest of the WMS. Checkers appear to have difficulty recalling details of meaningfully linked sequences, either presented in narrative form or engaged in personally. Although the reasons for these checking-related deficits are not clear, a complete understanding of checking phenomena will involve an appreciation of the role played by memory deficits.     

Walking through doorways causes forgetting: Further explorations

Previous research using virtual environments has revealed a location-updating effect in which there is a decline in memory when people move from one location to another. Here we assess whether this effect reflects the influence of the experienced context, in terms of the degree of immersion of a person in an environment, as suggested by some work in spatial cognition, or by a shift in context. In Experiment 1, the degree of immersion was reduced by using smaller displays. In comparison, in Experiment 2 an actual, rather than a virtual, environment was used, to maximize immersion. Location-updating effects were observed under both of these conditions. In Experiment 3, the original encoding context was reinstated by having a person return to the original room in which objects were first encoded. However, inconsistent with an encoding specificity account, memory did not improve by reinstating this context. Finally, we did a further analysis of the results of this and previous experiments to assess the differential influence of foregrounding and retrieval interference. Overall, these data are interpreted in terms of the event horizon model of event cognition and memory.     

Further explorations of common-sense representations of common illnesses

A simple method is presented for measuring people's illness cognitions--their common-sense representations of common illnesses. Data were collected from 1,628 different respondents who described a recent illness form 1 to 3 separate times over a 17-month period. A free-clustering task performed by a set of naive participants confirmed that these cognitions fall into the five components that have been previously noted: identity, time line, consequences, cause, and cure. These five components are found to be reasonably stable over time and across different illness episodes. Several consequences of these illness cognitions, in terms of changes in health-locus-of-control beliefs and different propensities to visit a doctor, are also noted. Specifically, controllable attributions for getting sick and personal responsibility attributions for getting better are associated with increased beliefs in Self-Control Over Health and decreased beliefs in Chance Health Outcomes; people with strong Identity and Cure components in their common-sense representations of common illnesses have a greater propensity to visit a doctor when feeling ill.     

Walking through doorways causes forgetting: Further explorations

Previous research using virtual environments has revealed a location-updating effect in which there is a decline in memory when people move from one location to another. Here we assess whether this effect reflects the influence of the experienced context, in terms of the degree of immersion of a person in an environment, as suggested by some work in spatial cognition, or by a shift in context. In Experiment 1, the degree of immersion was reduced by using smaller displays. In comparison, in Experiment 2 an actual, rather than a virtual, environment was used, to maximize immersion. Location-updating effects were observed under both of these conditions. In Experiment 3, the original encoding context was reinstated by having a person return to the original room in which objects were first encoded. However, inconsistent with an encoding specificity account, memory did not improve by reinstating this context. Finally, we did a further analysis of the results of this and previous experiments to assess the differential influence of foregrounding and retrieval interference. Overall, these data are interpreted in terms of the event horizon model of event cognition and memory.     

Perceptual-cognitive explorations of a toroidal set of free-form stimuli

A polar-coordinate analogue of Fourier synthesis generates organic-appearing “free forms” that can be continuously deformed along any desired number of difficult-to-verbalize dimensions. Since the dimensions are also circular, the forms correspond to points on the surface of a torus which, though conveniently finite, is free of bounding edges. Two experiments explore a particular two-dimensional set of 81 such forms. The first shows that perceived pair-wise similarities among the individual forms are well explained purely in terms of the distances among their corresponding points in the toroidal parameter space. The second, however, establishes that forms that tend to be grouped together as having the same cognitive interpretation define regions in parameter space that are variously shaped or even bimodal and, hence, that cannot be explained solely on the basis of the fixed set of pair-wise similarities. The stimuli appear to offer a novel combination of cognitive richness and low-dimensional parametric control.     

Bilingualism and systemic psychotherapy: some formulations and explorations

Bilingualism has risen dramatically due to increased migration patterns all over the world. This paper offers an overview of the current literature dealing specifically with bi- and multilingualism, and identifies a gap in systemic and family therapy literature about the subject of bilingualism. In the light of this, the author proposes a working definition of bilingual families. Some case examples illustrate different aspects of working systemically with a bilingual family and highlight potential challenges for a therapist, such as the assumption of more knowledge and expertise. The tools suggested relate to a rethinking of some modernist ideas regarding hypothesizing, and both the use of a social constructionist perspective and of self of the (bilingual) family therapist. A case is made for the exploration of meanings of difference including the lingua-cultural one. The author ends with a plea to start including more specific cultural issues such as bilingualism in systemic therapy practice.     

Aging and implicit learning: explorations in contextual cuing

In contextual cuing, faster responses are made to repeated displays containing context-target associations than to novel displays without such covariances. We report that healthy older adults showed learning impairments in contextual cuing when compared with younger adults. The display properties in the task were altered to artificially increase younger adults' response times to match those of older adults and to produce faster responses in older participants; however, younger participants' learning remained intact, whereas older participants continued to show impairments under these conditions. These results suggest that older adults have intrinsic deficits in contextual cuing that cannot be attributed to their slower overall response speed.     

Further explorations with a process model for water jug problems

Subjects performed a water jug task in which the object was to find a sequence of pouring operations that would produce a specified amount of water in each jug. A model for this task is presented and evaluated. The model makes strong assumptions concerning lack of planning in the water jug task. In addition, alternative models incorporating planning assumptions were considered. Alternative models were evaluated in two experiments. All experimental conditions were successfully simulated by making reasonable and well-motivated parameter changes in our model, which assumes no planning. Further, several classes of models incorporating planning assumptions were shown to be inconsistent with the observed results.     

Genders and sexualities in individuation: theoretical and clinical explorations

Abstract :  Gender assignment, as a key aspect of identity and cultural position, has existed throughout recorded time and across all cultures. An individual's biological sex and particular cultural milieu has a profound effect on their sense of themselves as a gendered being. Sexuality is a more recent marker in identity formation. In the last few decades there has emerged a great deal of interest in the psychology of gender formation, in the interplay of biological sex, culture, brain development, and attachment experiences in the formation of gender identities. Queer theory in its post-modern deconstructionist thinking has suggested that gender is a socially 'constructed' concept having no biological or psychological precursors or realities. Contemporary developmental psychoanalysis is bridging the gap between concepts of gender as purely biological and gender as non-existent. In this paper I explore the emergence of same-sex desire at mid-life, presenting two case histories with extensive dream material. The impact of sexual desire on gender identities is examined through the lenses of culture, dynamic systems theory, neuroscience, and depth psychology. The use of dream analysis as a window into the body/mind movement of gender emergence reflects my sense of gender as a fluidly shifting reality of mind, neither hardwired nor fictional.     

Individual differences in speech fusion: Methodological and theoretical explorations

Day (Note 1) constructed pairs of speech sounds such as “lanket” and “banket” from words (e.g., blanket) by omitting either the first or second consonant. When these two components were presented about the same time, one to each ear, some people appeared to fuse them, reporting they heard the word. Other people rarely fused. Moreover, if asked to report the first letter they heard, a judgment of temporal order, subjects that tended to fuse also reported what would be the first consonant of the word, even when it was not first in the pair of components. From this and other evidence, Day concluded that the perception of some individuals might be “language-bound.” We tested a strong version of the language-boundness view of fusion and were able to reject it. We also examined several other possible causes of individual differences in fusion rate. Our second experiment provides evidence that a more general failure to discriminate temporal order of even nonlinguistic material may be involved.