A motor similarity effect in object memory

In line with theories of embodied cognition (e.g., Versace et al. European Journal of Cognitive Psychology, 21, 522–560, 2009), several studies have suggested that the motor system used to interact with objects in our environment is involved in object recognition (e.g., Helbig, Graf, & Kiefer Experimental Brain Research, 174, 221-228, 2006). However, the role of the motor system in immediate memory for objects is more controversial. The objective of the present study was to investigate the role of the motor system in object memory by manipulating the similarity between the actions associated to series of objects to be retained in memory. In Experiment 1, we showed that lists of objects associated to dissimilar actions were better recalled than lists associated to similar actions. We then showed that this effect was abolished when participants were required to perform a concurrent motor suppression task (Experiment 2) and when the objects to be memorized were unmanipulable (Experiment 3). The motor similarity effect provides evidence for the role of motor affordances in object memory.     

Le travail collectif à l’épreuve des restructurations organisationnelles

The ergonomic analysis of work (Daniellou, 1996; Wisner, 1996) and especially the psychological analysis of real working activity (Leplat, 2000) allow investigating the main factors of work situations. The objective is to show the influence on the nursing representations of psychiatric services that are restructured, of the initial working situations, the projects, the restructuring models. The analyses assess the nursing representations of psychiatric services that are restructured, the projects, the restructuring models, the real working activity. The data show impacts of collective work and restructuring models, especially the damaging consequences of fusions. The results enable the authors to discuss from the points of views of theory, methodology and interventions.     

Effect of age on forward and backward digit spans

Abstract

A number of studies has suggested that aging is characterized by a decline in the central executive while the automatic processes (in particular operations by the phonological loop) remain intact. According to interpretation, age differences should be minimal in verbal forward digit span while they should be more important in backward verbal digit span. A sample of 1,000 subjects with ages ranging from 16 years to 79 years was used to test this hypothesis. the results show no significant effect of age on the difference between digit span forward and backward. the theoretical implications of these results are discussed.     

Characterization of long-term memory, resistance to extinction, and influence of temperament during two instrumental tasks in horses

The present study investigated the influence of temperament on long-term recall and extinction of 2 instrumental tasks in 26 horses. In the first task (backward task), horses learned to walk backward, using commands given by an experimenter, in order to obtain a food reward. In the second task (active avoidance task), horses had to cross an obstacle after a bell rang in order to avoid emission of an air puff. Twenty-two months after acquisition, horses exhibited perfect recall performance in both tasks. Accordingly, no influence of temperament on recall performance could be observed for either task. In contrast, in the absence of positive or negative outcomes, the horses’ ability to extinguish their response to either task was highly variable. Resistance to extinction was related to some indicators of temperament: The most fearful horses tended to be the most resistant to extinction in the backward task, while the least sensitive horses tended to be the most resistant to extinction in the active avoidance task. These findings reveal extensive long-term memory abilities in horses and suggest an influence of temperament on learning processes other than acquisition.     

The relevance of temporal cues in a fish sound: a first experimental investigation using modified signals in cichlids

Playback experiments have been a useful tool for studying the function of sounds and the relevance of different sound characteristics in signal recognition in many different species of vertebrates. However, successful playback experiments in sound-producing fish remain rare, and few studies have investigated the role of particular sound features in the encoding of information. In this study, we set-up an apparatus in order to test the relevance of acoustic signals in males of the cichlid Metriaclima zebra. We found that territorial males responded more to playbacks by increasing their territorial activity and approaching the loudspeaker during and after playbacks. If sounds are used to indicate the presence of a competitor, we modified two sound characteristics, that is, the pulse period and the number of pulses, in order to investigate whether the observed behavioural response was modulated by the temporal structure of sounds recorded during aggressive interactions. Modified sounds yielded little or no effect on the behavioural response they elicited in territorial males, suggesting a high tolerance for variations in pulse period and number of pulses. The biological function of sounds in M. zebra and the lack of responsiveness to our temporal modifications are discussed.     

Hidden feelings 1945-95

Abstract

It was a fact learnt early in life: wherever I travelled in Europe as a teenager, it paid me to explain that I was Dutch, not German. And when I left home at 18, in search of the elusive key to good faith and freedom, and came to Britain, crossing the Channel to reach the sole part of Europe untouched by enemy invasion, I felt I was welcomed like a lost daughter; many people told me of the part they played in the liberation of Holland in 1945. And now, fifty years after the historic events of the Second World War have passed, I still like to invoke the ‘magic’ if I can. While staying in a bed and breakfast in Coventry recently, I pointed out to the landlady that a morning call, as written down by the German guest, was requested at 7.15, instead of, as she had read, at 9.15. ‘Oh’, she said, annoyed, realizing the mistake: ‘Do they cross their number seven? We never do’. I was instantly eager to clear my name: ‘The Dutch never do so either’     

Functional cerebral changes in multiple sclerosis patients during an autobiographical memory test

Our aim was to investigate the functional underpinnings of autobiographical memory (AM) impairment in multiple sclerosis (MS) patients. To that end, 18 patients and 18 controls underwent the autobiographical interview (AI). Subsequently, the 36 participants underwent a functional magnetic resonance imaging (fMRI) session designed to assess the construction and elaboration of AMs. A categorical control task was also presented. Patients were trained in the fMRI procedure to optimise the procedural aspects accompanying the task itself. Although the patients obtained significantly poorer AI scores (p < .001), their performance on the easier AM fMRI task was efficiently carried out, allowing relevant comparisons with healthy controls. Relatively to healthy controls, the patients showed increased and bilateral cerebral activations (p < .005) during the construction and elaboration phases. The prefrontal, temporal and posterior cerebral region activations were located within the core network sustaining AM, with the bilateral prefrontal region being centrally involved. The parametric neural responses to the difficulty of access and amount of details of memories were also significantly different for the two groups, with the right hippocampal region showing a particularly increased recruitment (p < .005). The findings suggested the presence of functional cerebral changes during AM performance and supported the presence of AM retrieval deficit in MS patients.     

Health Related Quality of Life in Children with Congenital Heart Disease

Health-related quality of life in children with congenital heart disease (CHD) was compared to that of healthy children. Furthermore, agreement between child and parent reports was examined. In addition, differences in quality of life related to the severity of CHD were evaluated. One hundred children with CHD aged between 8-18 years and their parents answered a health-related quality of life-questionnaire during their visit to the paediatric cardiology outpatient department. CHD children reported reduced motor functioning and autonomy compared to healthy children. Parents of children with CHD reported their children to have a reduced quality of life in the domains of: motor functioning, autonomy and cognitive functioning. Agreement between child and parent reports was moderate. Children systematically reported lower health related quality of life on the domain of positive emotions than did parents. Health related quality of life in children with CHD appeared not to be influenced by severity of the disease. In conclusion, regardless of the severity of the disease, children with CHD reported their health related quality of life on several domains to be lower than that of healthy children. This means that on several domains, the emotional impact of problems in health status is greater for children with CHD than for healthy children. When CHD patients visit the clinic, it is important that physicians actively ask patients as well as parents about the child's motor functioning, autonomy and cognitive functioning. Children with problems in these domains can then be identified, and psychological interventions can take place at an early stage.