Animats and what they can tell us

Animats-autonomous robots or simulations of animals-and the animat approach represent the most recent attempt to comprehend the capacity of animals for autonomous generation of adaptive, intelligent behavior in complex, changing environments. Motivated by perceived limitations in classical artificial intelligence (AI), the animat approach promulgates an alternative, bottom-up route to understanding intelligent behavior. Important tenets include: (1) that adaptive behavior is best understood by focusing on the interaction between a behaving individual and its environment, hence the interest in `embodied' physical robots `situated' in natural environments; (2) that specific abilities, `behaviors', are more natural units of analysis and design than general, information-processing functions and world models; and (3) that high-level behaviors will emerge as systems composed of simple behavioral competences become more complex. Thus, animat research often begins with low-level sensorimotor abilities and then moves up towards higher, cognitive functions. Both in analysis and in design, the animat approach borrows heavily from ethology, psychology, neurobiology and evolutionary biology, as well as from connectionism. For AI and robotics researchers, understanding the mechanisms behind adaptive behavior is secondary to creating them, but natural scientists can hope for tools and concepts to aid understanding of biological systems.     

Demonstrations of spatiotemporal integration and what they tell us about the visual system

Five sets of displays are presented on the journal website to be viewed in conjunction with the text. We concentrate on the factors that give rise to the integration and disruption of the direction of apparent motion in two-dimensional and three-dimensional space. In the first set of displays we examine what factors contribute to the integration and disruption of apparent motion in the Ramachandran/Anstis clustered bistable quartets. In the second set we examine what factors give rise to the perception of the direction of motion in rotating two-dimensional wheels and dots. In the third and fourth sets we examine how the depth cues of shading and disparity contribute to the perception of apparent motion of opaque displays, and to the perception of rotating unoccluded displays, respectively. In the fifth set we examine how the depth cue of motion parallax influences the perception of apparent motion. Throughout, we make inferences about the roles which various parallel pathways and cortical areas play in the perceptions produced by the displays shown.     

Rethinking homosexuality: what it teaches us about psychoanalysis

This presentation, written ten years after the American Psychoanalytic Association adopted a nondiscrimination policy with regard to sexual orientation, discusses the evolving relationship between psychoanalysis and homosexuality. The paper is in three sections: (1) the process of policy change and the overturning of injustice; (2) the excursion after Freud's death into analytic bias and extreme pathologizing of homosexuality, the struggle to overcome those distortions, and the lessons to be learned from this history; and (3) the search, in the coming decade, for new understanding of homosexuality and all aspects of sexuality.     

信念归因的机制:fMRI能告诉我们什么

发展心理学研究表明信念归因与抑制性控制和语言(特别是补充句法,complement syntax)有着密切的联系,儿童抑制性控制能力和补充句法能力与其错误信念任务的表现有较高的相关。但是抑制性控制能力和补充句法能力对于信念归因是不是必须的在发展心理学中并没有得到解决。脑成像研究表明,信念归因与抑制性控制和补充句法有着不同的神经机制,从而在一定程度上表明,至少对于大人,在完成错误信念归因任务过程中可能并不需要抑制性控制和补充句法。     

What clocks tell us about the neural correlates of spatial imagery

We review a series of experimental studies aimed at answering some critical questions about the neural basis of spatial imagery. Our group used functional magnetic resonance imaging (fMRI) to explore the neural correlates of an online behaviourally controlled spatial imagery task without need for visual presentation—the mental clock task. Subjects are asked to imagine pairs of times that are presented acoustically and to judge at which of the two times the clock hands form the greater angle. The cortical activation elicited by this task was contrasted with that obtained during other visual, perceptual, verbal, and spatial imagery tasks in several block design studies. Moreover, our group performed an event‐related fMRI study on the clock task to investigate the representation of component cognitive processes in spatial imagery. The bulk of our findings demonstrates that cortical areas in the posterior parietal cortex (PPC), along the intraparietal sulcus, are robustly involved in spatial mental imagery and in other tasks requiring spatial transformations. PPC is bilaterally involved in different kinds of spatial judgement. Yet the degree to which right and left PPC are activated in different tasks is a function of task requirements. From event‐related fMRI data we obtained evidence that left and right PPC are activated asynchronously during the clock task and this could reflect their different functional role in subserving cognitive components of visuospatial imagery.     

The importance of what they care about

Many forms of contemporary morality treat the individual as the fundamental unit of moral importance. Perhaps the most striking example of this moral vision of the individual is the contemporary global human rights regime, which treats the individual as, for all intents and purposes, sacrosanct. This essay attempts to explore one feature of this contemporary understanding of the moral status of the individual, namely the moral significance of a subject’s actual affective states, and in particular her cares and commitments. I argue that in virtue of the moral significance of actual individuals, we should take actual cares and values very seriously—even if those cares and values are not expressions of the person’s autonomy—as partially constituting that individual as a concrete subject who is the proper object of our moral attention. In particular, I argue that a person’s actual cares and values have non-derivative moral significance. Simply because someone cares about something, that care is morally significant. In virtue of this non-derivative moral significance of cares, we ought to adopt of a commitment to accommodate others’ cares and a commitment not to frustrate their cares.     

Acquiring new word meaning: What does it tell us about development

R. J. Sternberg (1984, Developmental Review, 4, 113–138) offers a thoughtful and provocative essay on how individuals acquire meanings for novel or unfamiliar nouns. The Sternberg essay, however, is incomplete on a number of grounds. By stressing general processes and specific knowledge as critical components in the acquisition of verbal concepts, for example, it overlooks two logically complementary categories—specific processes and general knowledge—and the role these play in the acquisitions in question. A second concern is that the paper blurs distinctions among development, short-term learning, and the origin/acquisition of individual differences. Finally, Sternberg is encouraged to frame the specific phenomenon described here within the context of a larger theory of intellectual development and to indicate what else this specific model can be used to explain.     

Psychopathy: what apology making tells us about moral agency

Psychopathy is often used to settle disputes about the nature of moral judgment. The “trolley problem” is a familiar scenario in which psychopathy is used as a test case. Where a convergence in response to the trolley problem is registered between psychopathic subjects and non-psychopathic (normal) subjects, it is assumed that this convergence indicates that the capacity for making moral judgments is unimpaired in psychopathy. This, in turn, is taken to have implications for the dispute between motivation internalists and motivation externalists, for instance. In what follows, we want to do two things: firstly, we set out to question the assumption that convergence is informative of the capacity for moral judgment in psychopathy. Next, we consider a distinct feature of psychopathy which we think provides strong grounds for holding that the capacity for moral judgment is seriously impaired in psychopathic subjects. The feature in question is the psychopathic subject’s inability to make sincere apologies. Our central claim will be this: convergence in response to trolley problems does not tell us very much about the psychopathic subject’s capacity to make moral judgments, but his inability to make sincere apologies does provide us with strong grounds for holding that this capacity is seriously impaired in psychopathy.     

What various kinds of errors tell us about lateral masking effects

Error analyses were conducted to study processes underlying lateral masking effects. Location errors (i.e., confusions with a flanking letter) occurred at a rate higher than chance, and they increased with increasing eccentricity and with decreasing spacing. In longer strings, confusions with a flanker directly adjacent to the target (which is itself laterally masked) were more frequent than with a far flanker, and these confusions also increased with increasing eccentricity and with decreasing spacing indicating that identification of the letter's form is not necessarily disturbed by adjacent characters. This was confirmed in a whole report task, where there was better recognition performance for the central letter than in partial report. Whereas in partial report, the left flanker was more often confused with the target than the right one, in whole report, the left-most letter was recognized best. The data provide evidence that positional uncertainty contributes to lateral masking effects, and that a substantial portion of positional uncertainty occurs after having identified the letter's forms.     

The individualization of conscience: what Daybreak (9, 10, 544) and The Gay Science (117) tell us about the sovereign individual

ABSTRACT

The figure of the sovereign individual has stood for about two decades at the center of an exegetical debate concerning its identity and ideality. What is often lost sight of in these debates is the role of the sovereign individual in Nietzsche’s genealogy of guilt and bad conscience in the Genealogy’s second essay. I argue for the following claims. First, that the figure of the sovereign individual is not a singular occurrence in Nietzsche’s published writings but is present in sections from Daybreak and The Gay Science that have not been pursued in this context in the Anglophone literature; sections that shed new light on the sovereign individual. Second, that examination of these texts reveals that the sovereign individual is for Nietzsche embodied by Socrates and the Socratic individual. Third, and most importantly, that with the sovereign individual there emerges individualized conscience – the capacity for self-laceration that concerns one’s misdeeds alone and involves the belief that one’s misdeeds are entirely one’s own individual fault, rather than the fault of the community or the gods. A fourth, rather negative consequence, is that at the end of the day Nietzsche, in the Genealogy, does not manage to provide us with a genealogy of moral guilt.     

What catatonia can tell us about "top-down modulation": a neuropsychiatric hypothesis

Differential diagnosis of motor symptoms, for example, akinesia, may be difficult in clinical neuropsychiatry. Symptoms may be either of neurologic origin, for example, Parkinson's disease, or of psychiatric origin, for example, catatonia, leading to a so-called "conflict of paradigms." Despite their different origins, symptoms may appear more or less clinically similar. Possibility of dissociation between origin and clinical appearance may reflect functional brain organisation in general, and cortical-cortical/subcortical relations in particular. It is therefore hypothesized that similarities and differences between Parkinson's disease and catatonia may be accounted for by distinct kinds of modulation between cortico-cortical and cortico-subcortical relations. Catatonia can be characterized by concurrent motor, emotional, and behavioural symptoms. The different symptoms may be accounted for by dysfunction in orbitofrontal-prefrontal/parietal cortical connectivity reflecting "horizontal modulation" of cortico-cortical relation. Furthermore, alteration in "top-down modulation" reflecting "vertical modulation" of caudate and other basal ganglia by GABA-ergic mediated orbitofrontal cortical deficits may account for motor symptoms in catatonia. Parkinson's disease, in contrast, can be characterized by predominant motor symptoms. Motor symptoms may be accounted for by altered "bottom-up modulation" between dopaminergic mediated deficits in striatum and premotor/motor cortex. Clinical similarities between Parkinson's disease and catatonia with respect to akinesia may be related with involvement of the basal ganglia in both disorders. Clinical differences with respect to emotional and behavioural symptoms may be related with involvement of different cortical areas, that is, orbitofrontal/parietal and premotor/motor cortex implying distinct kinds of modulation--"vertical" and "horizontal" modulation, respectively.     

What does the Ternus display tell us about motion processing in human vision?

The Ternus display is a moving visual stimulus which elicits two very different percepts, according to the length of the interstimulus interval (ISI) between each frame of the motion sequence. These two percepts, referred to as element motion and group motion, have previously been analysed in terms of the operation of a low-level, dedicated short-range motion process (in the case of element motion), and of a higher-level, attentional long-range motion process (in the case of group motion). We used a novel Ternus configuration to show that both element and group motion are, in fact, mediated solely by a process sensitive to changes in the spatial appearance of the Ternus elements. In light of this, it appears that Ternus displays tell us nothing about low-level motion processing, implying that previous studies using Ternus displays, for instance those dealing with dyslexia, require reinterpretation. Further manipulations of the Ternus display revealed that the orientation and spatial-frequency discrimination of the process underlying the analysis of Ternus displays is far worse than thresholds for spatial vision. We conclude that Ternus displays are analysed via a long-range motion, or feature-tracking, process, and that this process is distinct from spatial vision.     

What gene-environment interactions can tell us about social competence in typical and atypical populations

Social competence is a complex human behaviour that is likely to involve a system of genes that interacts with a myriad of environmental risk and protective factors. The search for its genetic and environmental origins and influences is equally complex and will require a multidimensional conceptualization and multiple methods and levels of analysis. Behavioural genetic research can begin to address the fundamental yet complex question of how children develop social competence by uncovering the various influences on social development and disentangling variance due to multiple genes, environments and experiences. In this paper, we review the current status of research on sociability, face recognition, emotion recognition, and theory of mind (TOM)--well defined and measured constructs that are likely to be useful indices for detecting genetic and environmental influences on social competence. We also propose specific milestones as indices of further progress in the field: the development of an operational definition of the construct of social competence, the identification of social endophenotypes-psychological processes that are validly and reliably measured components of social competence, and improving specificity and homogeneity with regard to social endophenotypes within a population of study by employing 'extreme social phenotypes'. These efforts will lead to a better understanding of the specific contributions to the normal variation of social competence in the general population as well as to atypical social development.     

What emotional reactions can tell us about the nature of others: An appraisal perspective on person perception

The present research aimed to assess how people use knowledge about the emotional reactions of others to make inferences about their character. Specifically, we postulate that people can reconstruct or “reverse engineer” the appraisals underlying an emotional reaction and use this appraisal information to draw person perception inferences. As predicted, a person who reacted with anger to blame was perceived as more aggressive, and self-confident, but also as less warm and gentle than a person who reacted with sadness (Study 1). A person who reacted with a smile (Study 1) or remained neutral (Study 2) was perceived as self-confident but also as unemotional. These perceptions were mediated by perceived appraisals.     

"Come on, Jack, tell us about yourself": the growth spurt of group psychotherapy

Group psychotherapy evidenced a growth spurt in the decade of the 1930s and prior to World War II. Following upon the pioneering efforts of the psychoeducators (Pratt, Marsh, Lazell) and the writings of the early analysts (Freud, Adler, Dreikurs, Burrow), the next wave of practitioners and theorizers popularized and expounded the use of the group treatment modality in hospitals, clinics, and private practice. A review of the seminal ideas and efforts of Jacob Moreno, Louis Wender, Paul Schilder, Lauretta Bender, Alexander Wolf, and Samuel Slavson continues the historical overview begun earlier in this journal (Ettin, 1988). In a continuing effort to call up the wisdom of the past in the service of the work of the present, the emphasis in this paper will be on practical application. Representative quotes will be embedded in the text to capture the tenor of the times, and special attention will be given to (1) theoretical underpinnings such as the proposed advantages, curative variables, and therapy goals of a group treatment; (2) the basic logistics of practice, including optimum group size, composition, membership and exclusion criteria, and length, frequency, and structure of the meetings; and (3) technical considerations, such as the role of the therapist and the techniques, procedures, and processes of the ongoing group endeavor, as well as the interface between individual and group sessions. In conclusion, it will be argued that group psychotherapy matured just in time to respond to the pressing need for efficient mental treatment mandated by the coming of the Second World War.     

Researchers discover what they already knew about validity: The case of the family-of-Origin Scale

This article is concerned with two recnet studies of the Family-of-Origin Scale (FOS), Gavin and Wamboldt (1992) and Ryan, Kawash, Fine, and Powel (1994). The external validity analyses conducted for the FOS in these studies assumed the scale to be a unidemsional measure. The present discussion centers on methodological decisions and interpretive strategies that may have prevented a more complete understanding of the scale's dimensional structure and theoretical meaning. It is concluded that a unidimensional view of the FOS is an oversimplification that is inconsistent with the available data. A case is made for a more comprehensive and technically adequate evaluation of the FOS. Specific suggestions are offered.