Toddlers' categorization of typical and scrambled dolls and cars

Previous research has demonstrated discrimination of scrambled from typical human body shapes at 15–18 months of age [Slaughter, V., & Heron, M. (2004). Origins and early development of human body knowledge. Monographs of the Society for Research in Child Development, 69]. In the current study 18-, 24- and 30-month-old infants were presented with four typical and four scrambled dolls in a sequential touching procedure, to assess the development of explicit categorization of human body shapes. Infants were also presented with typical and scrambled cars, allowing comparison of infants’ categorization of scrambled and typical exemplars in a different domain. Spontaneous comments regarding category membership were recorded. Girls categorized dolls and cars as typical or scrambled at 30 months, whereas boys only categorized the cars. Earliest categorization was for typical and scrambled cars, at 24 months, but only for boys. Language-based knowledge, coded from infants’ comments, followed the same pattern. This suggests that human body knowledge does not have privileged status in infancy. Gender differences in performance are discussed.     

Spatial reasoning with external visualizations: what matters is what you see, not whether you interact

Three experiments examined the effects of interactive visualizations and spatial abilities on a task requiring participants to infer and draw cross sections of a three-dimensional (3D) object. The experiments manipulated whether participants could interactively control a virtual 3D visualization of the object while performing the task, and compared participants who were allowed interactive control of the visualization to those who were not allowed control. In Experiment 1, interactivity produced better performance than passive viewing, but the advantage of interactivity disappeared in Experiment 2 when visual input for the two conditions in a yoked design was equalized. In Experiments 2 and 3, differences in how interactive participants manipulated the visualization were large and related to performance. In Experiment 3, non-interactive participants who watched optimal movements of the display performed as well as interactive participants who manipulated the visualization effectively and better than interactive participants who manipulated the visualization ineffectively. Spatial ability made an independent contribution to performance on the spatial reasoning task, but did not predict patterns of interactive behavior. These experiments indicate that providing participants with active control of a computer visualization does not necessarily enhance task performance, whereas seeing the most task-relevant information does, and this is true regardless of whether the task-relevant information is obtained actively or passively.     

Modeling how, when, and what is learned in a simple fault-finding task

We have developed a process model that learns in multiple ways while finding faults in a simple control panel device. The model predicts human participants' learning through its own learning. The model's performance was systematically compared to human learning data, including the time course and specific sequence of learned behaviors. These comparisons show that the model accounts very well for measures such as problem-solving strategy, the relative difficulty of faults, and average fault-finding time. More important, because the model learns and transfers its learning across problems, it also accounts for the faster problem-solving times due to learning when examined across participants, across faults, and across the series of 20 trials on an individual participant basis. The model shows how learning while problem solving can lead to more recognition-based performance, and helps explain how the shape of the learning curve can arise through learning and be modified by differential transfer. Overall, the quality of the correspondence appears to have arisen from procedural, declarative, and episodic learning all taking place within individual problem-solving episodes.     

Neuropsychological Effects of Brain Arteriovenous Malformations

Brain arteriovenous malformations (AVM's) are developmental, chronic lesions that provide unique information about the human brain and can be a useful model for neuroscientists to study cerebral reorganization and hemodynamics. We review the neuroanatomy, epidemiology, natural history, imaging and treatment of brain AVMs, and provide a model with which to better understand neuropsychological functioning and brain reorganization. We suggest that future studies must exclude ruptured AVMs if they wish to further explain focal neurological/cognitive deficits associated with this neurovascular anomaly.     

Being Human: Experiencing and Communicating

Haye’s article Living being and speaking being highlights a confusion that the traditional cognitive science has been making between cognition and representation, reducing semantics (meaning) to the syntax (computation with symbols). This traditional view cannot fully grasp the dependence of meaning on the relational context, opening space for the need to take into account the Bakhtinian notions of responsivity and addressivity to an other as defining features of the communicational social act. Socialized signs are conceived here as central tools to our relation to the world and to the others. We pursue some of the implications of this radical dialogical commitment specifying their implications to an ontological level of human beings: relationships are the ground for the depiction of human beings and otherness as a necessary complementarity of our own existence.     

Regulating Nanomedicine—The Smallest of Our Concerns?

This paper, guided by the UNESCO Universal Declaration on Bioethics and Human Rights, assumes that regulators should aim to support the development of nanomedicine while, at the same time, putting in place whatever limits or safeguards are indicated by ethical considerations. Relative to this regulatory objective, it is argued that, notwithstanding the importance of precaution (characteristically, concerning health, safety, and the environment), ethical reflection needs to go both broader and deeper. It is suggested that, by attending to the basic matrix of ethical debate and the “bioethical triangle” through which the matrix is currently articulated, the breadth, depth, and conflictual plurality of ethical concerns about nanomedicine will be clarified. In this light, the conventional thinking about precaution is revisited and concerns about human dignity and informed consent (under conditions of extreme uncertainty) are analysed. The paper concludes that, once the range of ethical pluralism is grasped, the extent of the challenge facing regulators will be more clearly appreciated.

Is There a Right to Have Rights? The Case of the Right of Asylum

In dialogue with the political philosophy of Hannah Arendt and Seyla Benhabib the author draws on the idea of a right to have rights and raises the question under which political conditions asylum can be a subjective right for political refugees. He argues that mere spontaneous acts of humanitarianism will not suffice to define the institutional commitments of liberal democracies in refugee policy. At the same time, no duty for any particular state to take up refugees can be derived from a right to have rights. The quest for institutional solutions for a timely migration and asylum policy will rather enhance the discourses on the self-understanding of liberal democracies. With a critical eye on German asylum legislation and legal practice, the author contends that it will be a task of any co-ordinated European right of asylum to define political persecution in relation to the first dimension of human rights in order to differentiate the right of asylum from immigration legislation.     

The paradox of happiness: towards an alternative explanation

There is a common empirical finding in many countries that substantial increases in real per capita income do not correspond to equivalent increases of individual happiness. These findings have puzzled many economists that some have called the “paradox of happiness”. There have been a number of explanations regarding this paradox. This paper attempts to tackle the paradox of happiness by employing the idea of hierarchical choice. The hierarchical approach implies that there are some basic human needs which must be satisfied before non-basic needs come into the picture. The paper argues that the hierarchical structure of needs implies that the satisfaction of basic needs provides substantial increases to individual happiness compared to the subsequent satisfaction of secondary needs. This might also be an alternative explanation of empirical findings showing a positive relationship between income and happiness up to certain level of income. It can also be combined with existing explanations of the paradox and thus enhance our understanding of the issue.

Scaffolding the design of accessible eLearning content: a user-centered approach and cognitive perspective

There exist various guidelines for facilitating the design, preparation, and deployment of accessible eLearning applications and contents. However, such guidelines prevalently address accessibility in a rather technical sense, without giving sufficient consideration to the cognitive aspects and issues related to the use of eLearning materials by learners with disabilities. In this paper we describe how a user-centered design process was applied to develop a method and set of guidelines for didactical experts to scaffold their creation of accessible eLearning content, based on a more sound approach to accessibility. The paper also discusses possible design solutions for tools supporting eLearning content authors in the adoption and application of the proposed approach.     

Modality and domain specific components in auditory and visual working memory tasks

In the tripartite model of working memory (WM) it is postulated that a unique part system—the visuo-spatial sketchpad (VSSP)—processes non-verbal content. Due to behavioral and neurophysiological findings, the VSSP was later subdivided into visual object and visual spatial processing, the former representing objects’ appearance and the latter spatial information. This distinction is well supported. However, a challenge to this model is the question how spatial information from non-visual sensory modalities, for example the auditory one, is processed. Only a few studies so far have directly compared visual and auditory spatial WM. They suggest that the distinction of two processing domains—one for object and one for spatial information—also holds true for auditory WM, but that only a part of the processes is modality specific. We propose that processing in the object domain (the item’s appearance) is modality specific, while spatial WM as well as object-location binding relies on modality general processes.