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191.
Yeshurun and Levy (2003) reported that temporal discrimination performance of a visual stimulus benefits when spatial attention is oriented away from its location. In the present study, we investigated whether this negative influence of attention on temporal discrimination performance is restricted to transient spatial attention or might generalize to other paradigms of attention. We employed the attentional blink (AB) paradigm and required either a spatial (Experiment 1) or a temporal discrimination task (Experiment 2). The results of both experiments revealed a performance decrement if attention was temporally unavailable during the AB and a recovery with increasing attentional availability. Thus, contrary to the results of Yeshurun and Levy, the absence of attention decreased temporal discrimination performance in this paradigm. We hypothesize that attention which operates at different processing levels might exert differential effects on temporal stimulus processing. 相似文献
192.
The relation between conscious recollection and source memory for perceptual details was investigated in three experiments that combined the remember-know paradigm with a multidimensional source monitoring test. Experiment 1 replicated that source memory for perceptual details is better in the case of "remember" than "know" judgments. Experiment 2 showed that the relation between "remember" judgments and source memory for perceptual details is diminished by a semantic orienting task during encoding. Experiment 3 demonstrated that "remember" judgments are related to enhanced source memory for specific and unique kinds of perceptual source information, whereas memory for incomplete and global perceptual source information does not differentiate between "remember" and "know" judgments. The results show that the attentional focus during encoding and the specificity of retrieved source information form boundary conditions for the use of source memory for perceptual details as a basis of "remember" judgments. 相似文献
193.
The aim of the present paper was to describe and evaluate many of the measurement scales currently used in genetic counseling
outcomes research. A team of three researchers reviewed the available literature and selected a variety of validated instruments
suitable for measurement of genetic counseling outcomes. There are numerous scales to assess each of the following outcomes
among counselees: satisfaction with genetic counseling; knowledge; decision-making; psychological adjustment; coping; perceived
personal control; perceptions of disease risk; and family communication about genetic risk. However, the strengths and limitations
inherent to each instrument warrant careful consideration prior to implementation. In the genetic counseling context, scale
selection should be undertaken with thought directed towards the characteristics of the research sample (e.g. levels of literacy,
culture, medical condition), the practicalities of the research setting (e.g. available funding and resources, time restrictions,
researcher expertise), the purpose of the research (i.e. the specific aspect of the genetic counseling experience to be studied),
and the science underlying the scale (e.g. theoretical framework, psychometric properties). 相似文献
194.
Recent research revealed considerable decline in visual perception under low luminance conditions. However, systematic studies on how visual performance is affected by absolute luminance and luminance contrast under low mesopic conditions (<0.5 cd/m2) is lacking. We examined performance in a simple visual discrimination task under low mesopic luminance conditions in three experiments in which we systematically varied base luminance and luminance contrast between stimulus and background. We further manipulated eccentricity of the stimuli because of known rods and cones gradients along the retina. We identified a “deficiency window” for performance as measured by d’ when luminance was < 0.06 cd/m2 and luminance contrast as measured by the luminance ratio between stimulus and background was below < 1.7. We further calculated performance-based luminance as well as contrast efficiency functions for reaction times (RTs). These power functions demonstrate the contrast asymptote needed to decrease RTs and how such a decrease can be achieved given various combinations of absolute luminance and luminance contrast manipulations. Increased eccentricity resulted in slower RTs indicative of longer scan distances. Our data provide initial insights to performance-based efficiency functions in low mesopic environments that are currently lacking and to the physical mechanisms being utilized for visual perception in these extreme environments. 相似文献
195.
Cognitive processes in stereotype formation: the role of correct contingency learning for biased group judgments 总被引:2,自引:0,他引:2
Three studies investigated contingency learning and stereotype formation in a scenario about group membership and behavior with a confounding context factor. The studies tested predictions from theoretical accounts of biased group judgments in terms of simplistic reasoning, parallel distributed memory, and pseudocontingencies. Study 1 revealed a positive correlation between erroneous stereotype formation and learning of the true contingencies with the confounding factor. Study 2 showed that a focus manipulation during encoding moderated the correlation between stereotype formation and contingency learning but not the strength of the erroneous stereotype. Study 3 used a quasiexperimental comparison between participants with biased versus unbiased group judgments and extended the findings of a positive relation between stereotype formation and contingency learning. The results support an explanation of biased group judgments by pseudocontingencies; that is, unwarranted inferences from accurately perceived bivariate correlations in complex environments. 相似文献
196.
In a game context, nonwords either were artificially associated with negative valence or were in some sense neutral or irrelevant. Subsequently, participants memorized target words in silence or while attempting to ignore the negatively valent, irrelevant, or neutral auditory distractor nonwords. The presence of distractor nonwords impaired recall performance, but negative distractor nonwords caused more disruption than neutral and irrelevant distractors, which did not differ in how much disruption they caused. These findings conceptually replicate earlier results showing disruption due to valence with natural language words and extend them by demonstrating that auditory features that may possibly be confounded with valence in natural language words cannot be the cause of the observed disruption. Explanations of the irrelevant speech effect within working memory models that specify an explicit role of attention in the maintenance of information for immediate serial recall can explain this pattern of results, whereas structural models of working memory cannot. 相似文献
197.
This study assessed psychological adjustment and quality of life relative to population-based norms and knowledge about hereditary
hemochromatosis in a sample of 101 patients who attended a hemochromatosis clinic. Participants were assessed prior to their
clinic visit, and two weeks and 12 months after attendance, using self-administered questionnaires. Mean Mental Health Component
Scores from the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) (45.3, 95% CI 43.2, 47.4) were as compromised
as those found amongst stroke victims (45.9, 95% CI 42.8, 49.0) who had participated in a national health survey. Recall of
the genetic testing result was less than optimal, in that only 69.3% of those with genetic testing results knew whether they
carried one or two mutations. This study demonstrates that patients would benefit from routine assessment of psychological
distress and referral to mental health professionals of those whose levels of distress suggest a need for clinical intervention.
Results also show that patients may benefit from strategies aimed at improving recall of genetic testing results. 相似文献
198.
Redundancy gains and costs in cognitive processing: effects of short stimulus onset asynchronies 总被引:2,自引:0,他引:2
Mohr B Pulvermüller F 《Journal of experimental psychology. Learning, memory, and cognition》2002,28(6):1200-1223
In 7 experiments, the influence of varying stimulus onset asynchronies (SOAs) on the processing of redundant information about words and pseudowords was investigated. All stimuli were visually presented once or twice with 2 copies of the same item flashed either simultaneously or with short SOAs between presentations. The experiments revealed a redundancy gain for words that was absent for pseudowords. Furthermore, the redundancy gain disappeared at an SOA of 50 ms, and there was a gradual performance decline at longer SOAs. However, probing SOAs of 150 and 300 ms revealed that, compared with presentation of 1 target stimulus alone, words were processed significantly faster when target and redundantcopy appeared with a 150-ms lag. The results are tentatively explained in a neurocognitive framework. 相似文献
199.
Propositional reasoning and working memory: the role of prior training and pragmatic content 总被引:1,自引:0,他引:1
Working memory involvement in propositional reasoning was explored after different kinds of training. The training conditions aimed to reduce the impact of non-analytic heuristics and to enhance analytic inference processes according to mental logic theories, the mental model theory, and the theory of pragmatic reasoning schemata. Following an initial training phase, secondary task interference was investigated using concurrent spatial tapping (Experiment 1), random number generation (Experiment 2), and articulatory suppression (Experiment 3). A training condition practicing the construction and use of mental models via a truth table task increased the disruption of reasoning performance by random number generation and articulatory suppression, whereas the other training conditions did not affect susceptibility to secondary task interference. The results corroborate implications of the mental model theory of reasoning. 相似文献
200.
Event-based prospective memory is the ability to remember to execute an intention when an environmental cue occurs. It has been argued that, due to their special meaning, these cues are discrepant from their environment and therefore are sometimes spontaneously noticed. In line with this assumption, the likelihood that an intention will be executed increases with increased cue-discrepancy. It is not yet clear, however, whether these improvements are due to facilitated spontaneous noticing rather than to an increase in the efficiency of controlled cue-processing. To further investigate the spontaneous nature of cue-discrepancy benefits, we presented participants with stimuli that were unrelated to the intention but discrepant from other stimuli. Therefore, we experimentally increased the processing fluency of some stimuli for participants currently holding an intention by using different priming procedures. We found that stimuli whose fluency was increased via spaced repeated stimulus presentation (Experiment 1) or via short pre-exposure (Experiment 2a to 3) elicited a tendency to fulfill the intention despite its actual inappropriateness. Findings were inconsistent as to whether cue-memory uncertainty fosters the reliance on cue discrepancy for intention retrieval (Experiments 2a and 3). Taken together, the present findings provide converging evidence for a spontaneous discrepancy-based prospective-memory process which works independent of controlled processes. 相似文献