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.     

Vagueness: A Conceptual Spaces Approach

The conceptual spaces approach has recently emerged as a novel account of concepts. Its guiding idea is that concepts can be represented geometrically, by means of metrical spaces. While it is generally recognized that many of our concepts are vague, the question of how to model vagueness in the conceptual spaces approach has not been addressed so far, even though the answer is far from straightforward. The present paper aims to fill this lacuna.     

Prenatal Representations of Family in Parents and Coparental Interactions as Predictors of Triadic Interactions During Infancy

In this study, we explored the predictive role of family interactions and family representations in mothers and fathers during pregnancy for postnatal mother–father–infant interactions during the first 2 years after birth. Families (N = 42) were seen at the fifth month of pregnancy and at 3 and 18 months after birth. During pregnancy, parents were asked to play with their baby at the first meeting by using a doll in accordance with the procedure of the prenatal Lausanne Trilogue Play (LTP; A. Corboz‐Warnery & E. Fivaz‐Depeursinge, 2001; E. Fivaz‐Depeursinge, F. Frascarolo‐Moutinot, & A. Corboz‐Warnery, 2010). Family representations were assessed by administering the Family System Test (T. Gehring, 1998). Marital satisfaction and the history of the couple were assessed through self‐reported questionnaires. At 3 and 18 months, family interactions were assessed in the postnatal LTP. Infant temperament was assessed through parent reports. Results show that (a) prenatal interactions and child temperament are the most important predictors of family interactions and (b) paternal representations are predictive of family interactions at 3 months. These results show that observational assessment of “nascent” family interactions is possible during pregnancy, which would allow early screening of family maladjustment. The findings also highlight the necessity of taking into account paternal representations as a significant variable in the development of family interactions.