Do elderly couples have a better prospective memory than other elderly people when they collaborate?

A naturalistic study investigated how memory tasks affected group productivity for two individuals working in three kinds of group constellations: old married couples, old non‐friend pairs, and nominal groups of two individuals working on their own. The retrospective memory task was to recall episodic information given on a visit to a university campus. The prospective memory task was to remind the participants of actions to be performed during the visit. The prospective memory tasks were event‐based or time‐based. The delay or retention interval was also manipulated. In addition, an interview on how the elderly handled remembering during daily life was included. The results suggest that: (1) dyads suffered from collaboration relative to the predicted potential, replicating earlier research; old married couples did not reduce the same productivity loss as clearly as friends did in former studies; the couples who claimed that they used a transactive memory system, however, achieved the same productivity as the nominal pairs (i.e. the predicted potential; (2) the task effects produced unexpected results, some of which could be accounted for by the naturalistic setting used. Copyright © 2000 John Wiley & Sons, Ltd.     

Effort awareness and sense of volition in schizophrenia

Contemporary experimental research has emphasised the role of centrally generated signals arising from premotor areas in voluntary muscular force perception. It is therefore generally accepted that judgements of force are based on a central sense, known as the sense of effort, rather than on a sense of intra-muscular tension. Interestingly, the concept of effort is also present in the classical philosophy: to the French philosopher Maine de Biran [Maine de Biran (1805). Mémoire sur la décomposition de la pensée (Tome III), Vrin, Paris (1963)], the sense of effort is the fundamental component of self-experience, the landmark of the exercise of the will. In the present review, after a presentation of the nature and neurophysiological bases of effort sensation, we will examine its possible involvement in the neurocognitive process of agency. We will further focus on delusions of alien control in schizophrenic patients. Experimental data suggest that these patients have an abnormal awareness of effort caused by cerebral anomalies in the frontal and parietal lobes.     

Sequential adjustments before and after partial errors

In choice reaction time tasks, subjects speed up before making an error, but slow down afterward to prevent the occurrence of a new error. In some trials, the correct response is preceded by an incorrect electromyographic (EMG) activation too small to reach the response threshold. In this article, we show that these incorrect EMG activations give rise to the same sequential effects as overt errors: Before a trial containing an incorrect EMG activation, subjects speed up, whereas after that trial, they slow down. These activations reflect errors that have been detected, inhibited, and corrected in time. As such, they index the involvement of online executive control.     

Conceptions of ethical competence in relation to action readiness in Education for Sustainable Development

This paper explores notions of ethical competence in relation to Education for Sustainable Development (ESD). It carves out a conceptual field for future empirical research, by coupling the promotion of action readiness as an empirical concept with a theoretical understanding of ethical competence. The concept of competence displays interpretative pluralism as a concrete attribute of an individual or task and an unattainable ideal beyond the specific. With interpretive care, ethical competence, with its origin in values education, is suggested as a foundation of action readiness as ESD competence. In educational practice, action readiness is assumed to be fostered through real-world learning opportunities.     

Enhanced perceptual processing of speech in autism

Theories of autism have proposed that a bias towards low-level perceptual information, or a featural/surface-biased information-processing style, may compromise higher-level language processing in such individuals. Two experiments, utilizing linguistic stimuli with competing low-level/perceptual and high-level/semantic information, tested processing biases in children with autism and matched controls. Whereas children with autism exhibited superior perceptual processing of speech relative to controls, and showed no evidence of either a perceptual or semantic processing bias, controls showed a tendency to process speech semantically. The data provide partial support to the perceptual theories of autism. It is additionally proposed that the pattern of results may reflect different patterns of attentional focusing towards single or multiple stimulus cues in speech between children with autism and controls.     

Mental rotation: An event-related potential study with a validated mental rotation task

Event-related potentials (ERPs) were recorded while subjects performed a validated mental rotation task, taken from the cognitive psychology literature. These ERPs show a late posterior negativity relative to a baseline condition requiring all of the same perceptual and cognitive processes except for the mental rotation itself. Our tentative identification of this posterior negativity with mental rotation is further supported by the finding that it varies systematically with the amount of mental rotation required on a trial by trial basis in the experimental task. We conclude that this late negativity is an ERP marker of the mental rotation process, and that this process engages primarily posterior brain regions.     

The social value of risk-taking

In this study, the following hypothesis concerning the social value of risk-taking is advanced: young men who wish to assert themselves and to gain prestige tend to take greater risks in public when together with other young men than do young men who do not have these wishes, whereas there is no such difference in risk-taking in private. This hypothesis is empirically tested and is supported.