Spatial knowledge of children with spina bifida in a virtual large-scale space

The spatial knowledge of 18 children with spina bifida and 18 healthy control children (matched according to sex, age, and verbal IQ) was investigated in a computer-simulated environment. All children had to learn a route through a virtual floor system containing 18 landmarks. Controlling for cognitive abilities, the results revealed that children with spina bifida showed impaired route knowledge but not an impaired landmark knowledge. Thus the results suggest that children with spina bifida are not impaired in all large-scale abilities similarly. The impairments of the children with spina bifida are more accentuated in more behaviour based measurements, which indicates a relation to the reduced mobility of the children with spina bifida.     

Decomposing retrieval and integration in memory for actions: a multinomial modeling approach

Typically, action phrases are recalled better if participants are asked to enact the phrases than if they are just asked to remember them. When investigating which processes constitute this enactment effect a difficulty is that observable effects in standard memory tests are ambiguous because such tests require several processes. In the present article, we introduce a multinomial model that decomposes observable memory performance into a retrieval parameter and a parameter concerning the item-specific processing and integration of an action phrase. These parameters are estimated from free recall and cued recall performance. The model fitted the data of two experiments designed to test it. Experiment 1 demonstrated the basic usefulness of the model by showing expected differences in the integration parameter in the absence of unexpected differences in the retrieval parameter. Experiment 2 extended the conditions under which the model is useful by showing expected differences in the retrieval parameter even in the presence of unexpected differences in the integration parameter. Together, these findings support our theoretical framework according to which enactment generally boosts integration of action phrases, but increases retrieval only for phrases with context cues.     

Design-effects in prospective and retrospective memory for actions

There is ample evidence that memory for action phrases such as "open the bottle" is better in subject-performed tasks (SPTs), i.e., if the participants perform the actions, than in verbal tasks (VTs), if they only read the phrases or listen to them. It is less clear whether also the sole intention to perform the actions later, i.e., a prospective memory task (PT), improves memory compared with VTs. Inconsistent findings have been reported for within-subjects and between-subjects designs. The present study attempts to clarify the situation. In three experiments, better recall for SPTs than for PTs and for PTs than for VTs were observed if mixed lists were used. If pure lists were used, there was a PT effect but no SPT over PT advantage. The findings were discussed from the perspective of item-specific and relational information.     

The item-order hypothesis reconsidered: The role of order information in free recall

According to the item-order approach of free recall, in pure short lists the free recall of unrelated items is organized according to their order of presentation in the study list. The approach was applied in the present study to experimenter-performed tasks (EPTs) and subject-performed tasks (SPTs). It claims that EPTs provide better serial order information than SPTs. Consequently, free recall of EPTs should be more organized along the presentation order of the items than the free recall of SPTs. In three experiments, some specific aspects of this approach were studied. Firstly, it was demonstrated that serial retrieval is not strongly used spontaneously and that its use is overestimated in the literature because it is usually evoked by an order reconstruction test which follows free recall testing. Secondly, a serial retrieval strategy in free recall can be encouraged by explicit instructions. Finally, the present experiments showed that a serial output strategy alone does not allow one to predict performance in free recall. The implications of these findings for the item-order approach will be discussed.     

Effects of cold on human information processing: Application of a reaction time paradigm

Only a very few studies on the effects of cold on human information processing appear to exist. Therefore, the present experiment was designed to study the effects of the experimentally induced lowering of body core temperature on information processing, while applying a reaction time paradigm. Thirty healthy male volunteers performed a stimulus evaluation—response selection reaction time task after exposure to ambient temperatures of either 28 or 5°C. A 0.5°C-decrease in body core temperature resulted in a significant increase in both reaction and movement time indicating a general deteriorating effect of lowering of body core temperature on information processing. Mean reaction times were 538 ms and 549 ms for the control and the cold group, respectively (p<.05). The respective mean movement times were 298 ms and 269 ms (p<.001). Speed of stimulus evaluation was not sensitive to decreases in body core temperature. However, response complexity and body core temperature showed a significant interaction in their effect on movement time (p<.05), indicating that lowering of body core temperature is more likely to affect response-related stages of central information processing rather than stimulus evaluation. Furthermore, movement time appeared to be more sensitive to cold-induced effects on information processing as compared to reaction time. Additional correlational analyses suggest that the observed effects can be considered as independent of changes in skin temperature and experienced levels of thermal discomfort. Taken together, the results indicate that lowering of body core temperature differentially affects various stages of information processing.     

Mood influences on health-related judgments: Appraisal of own health versus appraisal of unhealthy behaviours

An experimental study assessed the impact of positive versus negative mood inductions on health-related judgments with respect to both self-appraisal of health (present health status, future health risks, unrealistic optimism), and appraisal of unhealthy behaviours' noxiousness compared to an untreated control condition. With respect to self-appraisal of health it was hypothesized that there should be stronger effects of negative mood than of positive mood, but that there should also be a mood by specific judgment task interaction. With respect to unhealthy behaviours' noxiousness ratings it was assumed that positive mood leads to higher noxiousness ratings than negative mood. The findings show that 23 per cent of the rating variances can be explained by the mood factor. In accord with the predictions self-appraisal of health was more negative under negative mood, but — with one exception — not more positive under positive mood than in the respective control condition. The exception relates to a measure of unrealistic optimism. Also in accord with the prediction positive mood led to higher noxiousness ratings of unhealthy behaviours than negative mood. All mood effects were independent of the respondents' sex, health locus of control and of the number of illness days during the previous year. Under an applied perspective it is discussed how negative mood may exert a double detrimental influence on health care, whereas positive mood does not lead to a ‘happy go lucky’ attitude.     

Telemedizin als effizientes Werkzeug in der Konsultation von Menschen mit Alkoholabhängigkeit

psychopraxis. neuropraxis - Zur Sicherstellung der Kontinuität der Versorgung suchtkranker Patienten zwischen dem ambulanten und stationären Sektor wurde ein Pilotprojekt der Telemedizin...     

Values and learning approaches of students at an international university

This study indicates that values are statistically significant precursors to approaches to learning in a cohort of predominantly Bulgarian, German and Romanian students studying at a German university where the language of instruction in all subject areas is English. Values have been measured with the Portrait Values Questionnaire (Schwartz et al. 2001), and approaches to learning have been assessed by the Study Process Questionnaire (Biggs, 1987). The relationships between values and approaches to learning have been estimated by canonical correlation analysis. Results of the analysis suggest that values can be linked to learning approaches in a situation where students have left their home countries to undertake tertiary studies in a new social, cultural and educational environment. Four distinct pairings between values and learning approaches emerge whereby: (a) self-aggrandisement is linked to the achievement learning variable, (b) conservatism relates to the surface learning variable, (c) self-directedness is linked to the deep learning variable and (d) benevolent change is related to the learning strategies variable. The analyses for this research were conducted while the second author was a visiting scholar at the Flinders University Institute of International Education in Adelaide, South Australia. The assistance of Professor John Keeves in the implementation and interpretation of additional statistical analyses is gratefully acknowledged.