In order to bridge interdisciplinary differences in Presence research and to establish connections between Presence and “older” concepts of psychology and communication, a theoretical model of the formation of Spatial Presence is proposed. It is applicable to the exposure to different media and intended to unify the existing efforts to develop a theory of Presence. The model includes assumptions about attention allocation, mental models, and involvement, and considers the role of media factors and user characteristics as well, thus incorporating much previous work. It is argued that a commonly accepted model of Spatial Presence is the only solution to secure further progress within the international, interdisciplinary and multiple-paradigm community of Presence research. 相似文献
Deficits in Working Memory (WM) are related to symptoms of Attention-Deficit/Hyperactivity Disorder (ADHD). In children with ADHD visuospatial WM is most impaired. WM is composed of Short-Term Memory (STM) and a Central Executive (CE). Therefore, deficits in either or both STM and the CE may account for WM impairments in children with ADHD. WM-component studies investigating this find deficits in both STM and the CE. However, recent studies show that not only cognitive deficits, but also motivational deficits give rise to the aberrant WM performance of children with ADHD. To date, the influence of these motivational deficits on the components of WM has not been investigated. This study examined the effects of a standard (feedback-only) and a high level of reinforcement (feedback + 10 euros) on the visuospatial WM-, visuospatial STM-, and the CE performance of 86 children with ADHD and 62 typically-developing controls. With standard reinforcement the STM, CE, and WM performance of children with ADHD was worse than that of controls. High reinforcement improved STM and WM performance more in children with ADHD than in controls, but was unable to normalize their performance. High reinforcement did not appear to improve the CE-related performance of children with ADHD and controls. Motivational deficits have a detrimental effect on both the visuospatial WM performance and the STM performance of children with ADHD. Aside from motivational deficits, both the visuospatial STM and the CE of children with ADHD are impaired, and give rise to their deficits in visuospatial WM. 相似文献
The current study examined the concept of multiculturalism as seen by 1,285 Dutch majority members, and tested its expected relation with acculturation and intergroup relations aspects. The concepts of multiculturalism and acculturation were unidimensional. Dutch majority members were slightly positive (almost neutral) toward multiculturalism, and saw both its advantages and disadvantages. They preferred immigrants to adapt as much as possible, and they perceived a norm that they should approve the immigrant's way of living. A path model showed that acculturation orientations and intergroup relations aspects (perceived social norms/social distance) predicted multicultural attitudes. Furthermore, multicultural attitudes predicted contact with and knowledge about immigrants. Finally, level of education and perceived opportunities in society were positively associated with multicultural attitudes. 相似文献
A well-known eye movement paradigm combines saccades (fast eye movements) with a perceptual discrimination task. At a variable
time after the onset of a central arrow cue indicating the target direction [the stimulus onset asynchrony (SOA)], discrimination
symbols appear briefly at saccade target and non-target locations. A previous study revealed an unexpected effect of SOA on
saccadic latencies: latencies were longer in trials with longer SOAs. It was suggested that this effect reflects a top-down
process as observers may wait for the discrimination symbol to appear before executing saccades. However, symbol onsets may
also modulate saccade latencies from the bottom-up. To clarify the origin of the SOA effect on latencies in this paradigm,
we used a simplified version of the original task plus two new symbol onset conditions for comparison. The results indicate
that the modulation of saccadic latencies was not due to a top-down strategy, but to a combination of two opposing bottom-up
effects: the symbol onsets at the target location shortened saccade latencies, while symbol onsets at non-target locations
lengthened saccade latencies. 相似文献
Emotional Lability (EL) is a source of impairment in multiple mental disorders of children, including attention-deficit/hyperactivity disorder (ADHD). It has been proposed that the overlap between EL and ADHD symptoms is the result of common neuropsychological deficits. The aim of the present study was to test this hypothesis by using a multi-method approach. In a mixed sample of 61 children (49 community sample and 12 children with an ADHD diagnosis) aged between 8 and 12 years, we examined the relationship between parental reports of ADHD and EL, real-time children’s emotional expressions in an experimental context, children’s performance on neuropsychological tasks and parental ratings of neuropsychological functioning. Parental EL ratings were significantly predicted by task-based reaction time variability and by questionnaire measures of Self-Direction & Organization and Arousal Regulation. Parental EL ratings were also significantly related to both ADHD symptom dimensions. After controlling for shared neuropsychological factors, ADHD symptoms no longer predicted parental EL ratings. Neuropsychological task performance was not significantly related to real time emotional expressions. However, positive emotional expressions were significantly predicted by higher parental ratings of Cognition and negative emotional expressions by parental ratings of low Effort engagement – accounting for some of the correlation with ADHD symptoms. The current results highlight the plausible role of cognitive energetic processes in explaining the EL and ADHD symptom association.
The three-space theory of problem solving predicts that the quality of a learner's model and the goal specificity of a task interact on knowledge acquisition. In Experiment 1 participants used a computer simulation of a lever system to learn about torques. They either had to test hypotheses (nonspecific goal), or to produce given values for variables (specific goal). In the good- but not in the poor-model condition they saw torque depicted as an area. Results revealed the predicted interaction. A nonspecific goal only resulted in better learning when a good model of torques was provided. In Experiment 2 participants learned to manipulate the inputs of a system to control its outputs. A nonspecific goal to explore the system helped performance when compared to a specific goal to reach certain values when participants were given a good model, but not when given a poor model that suggested the wrong hypothesis space. Our findings support the three-space theory. They emphasize the importance of understanding for problem solving and stress the need to study underlying processes. 相似文献
Recent studies have shown that processing words according to a survival scenario leads to superior retention relative to control
conditions. Here, we examined whether a survival recall advantage could be elicited by using pictures. Furthermore, in Experiment
1, we were interested in whether survival processing also results in improved memory for details. Undergraduates rated the
relevance of pictures in a survival, moving, or pleasantness scenario and were subsequently given a surprise free recall test.
We found that survival processing yielded superior retention. We also found that distortions occurred more often in the survival
condition than in the pleasantness condition. In Experiment 2, we directly compared the survival recall effect between pictures
and words. A comparable survival recall advantage was found for pictures and words. The present findings support the idea
that memory is enhanced by processing information in terms of fitness value, yet at the same time, the present results suggest
that this may increase the risk for memory distortions. 相似文献
Based on the concept of somatization, psychological distress can be experienced as symptoms of physical illness. This suggests a close‐fitting intra‐individual association between bodily complaints and mood in patients with somatoform disorder (SFD). The contemporaneous day‐to‐day complaints‐mood association was investigated in patients with severe chronic SFD using an ecological momentary assessment (EMA) design. Eleven patients, who had recently received specialized tertiary care treatment for severe chronic SFD, kept an online electronic diary for four consecutive weeks. They were prompted at intervals throughout the day to complete questions on their momentary primary symptoms (pain and fatigue), and mood state (negative and positive). For each measure, day‐mean aggregated values were computed and analyzed using linear multilevel (mixed model) regression analysis. Fixed factor results showed that symptoms were associated with both negative mood state (β = 0.47) and positive mood state (β = –0.59). Random results, however, indicated large inter‐individual differences, with correlations varying between 0.17 and 0.99 for negative affect, and between –0.88 and 0.14 for positive affect. A substantial day‐to‐day contemporaneous association between symptoms and affect across subjects, as well as large inter‐individual differences in this association, were demonstrated in patients with severe chronic SFD. EMA‐data showing the relationship between both negative and (inverse) positive mood and complaints has potential clinical relevance: providing SFD patients with feedback consisting of their personal day‐to‐day concurrency graph may promote their understanding of their own complaints in a broader context than the somatic area. 相似文献