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91.
92.
Franco A Destrebecqz A 《Advances in cognitive psychology / University of Finance and Management in Warsaw》2012,8(2):144-154
What is the nature of the representations acquired in implicit statistical
learning? Recent results in the field of language learning have shown that
adults and infants are able to find the words of an artificial language when
exposed to a continuous auditory sequence consisting in a random ordering of
these words. Such performance can only be based on processing the transitional
probabilities between sequence elements. Two different kinds of mechanisms may
account for these data: Participants may either parse the sequence into smaller
chunks corresponding to the words of the artificial language, or they may become
progressively sensitive to the actual values of the transitional probabilities
between syllables. The two accounts are difficult to differentiate because they
make similar predictions in comparable experimental settings. In this study, we
present two experiments that aimed at contrasting these two theories. In these
experiments, participants had to learn 2 sets of pseudo-linguistic regularities:
Language 1 (L1) and Language 2 (L2) presented in the context of a serial
reaction time task. L1 and L2 were either unrelated (none of the syllabic
transitions of L1 were present in L2), or partly related (some of the
intra-words transitions of L1 were used as inter-words transitions of L2). The
two accounts make opposite predictions in these two settings. Our results
indicate that the nature of the representations depends on the learning
condition. When cues were presented to facilitate parsing of the sequence,
participants learned the words of the artificial language. However, when no cues
were provided, performance was strongly influenced by the employed transitional
probabilities. 相似文献
93.
The intention to complete an action in the future can improve the learning of this action, but it is unknown whether this effect persists when feedback is manipulated during encoding. In Experiment 1, participants were instructed to learn a motor skill with or without intending to reproduce this learning in the future, and feedback on their movements was administrated by self-decision, that is, participants asked for feedback whenever they wanted it. The results showed that intention increased the frequency with which feedback was requested, but did not improve motor performance. In Experiment 2, participants had to learn the task with high or few feedbacks, which they could not control. In these conditions, intention was beneficial in promoting motor learning only for a low feedback schedule. We suggest that the beneficial effect of intention on learning can be overshadowed or emphasised by the feedback processing during encoding. These findings are discussed in light of theories surrounding prospective memory. 相似文献
94.
Natalio Extremera Manuel Sánchez‐García Ma Auxiliadora Durán Lourdes Rey 《International Journal of Selection & Assessment》2012,20(1):105-110
The aim of this study was to provide some evidence of reliability and validity of the 15‐item Spanish version of the Utrecht Work Engagement Scale (UWES) between two multi‐occupational samples. In two different studies, 525 human services employees (study 1; males = 233; females = 292) and 409 multi‐occupational employees (study 2; males = 179; females = 230) completed the Spanish UWES. In study 1, our results revealed satisfactory levels of reliability for each subscale. In addition, the confirmatory factor analysis revealed that the three‐factor model fitted better than the one‐factor model and supported the theoretical three‐factor structure (vigor, dedication, and absorption). Furthermore, results from the multi‐sample analysis found strict factorial invariance of the Spanish UWES across gender, suggesting that the UWES factors show the same composition and interpretation in both groups. In study 2, our results once again confirmed the same three‐factor structure for the Spanish UWES. We found support for theoretically proposed two‐factor model including: (1) emotional exhaustion and depersonalization and (2) all three dimensions of engagement plus personal accomplishment. We also found evidence of convergent, discriminant, and incremental validity with respect to burnout, life satisfaction, and perceived stress. In short, our results provide empirical support for structural validity of the Spanish UWES in multi‐occupational workers. 相似文献
95.
Tool-use representations have been suggested to be supported by the representation of hand actions and/or by the representation of tool actions. A major issue is to know which one of these two representations is preferentially activated when people intend to use a tool. To address this issue, we developed a paradigm in which, in 20% of trials, participants had to press a button and actually use pliers to move an object in response to a predefined target symbol. Importantly, two masks hiding the symbols performed “opening” or “closing” actions before symbols appeared. In Experiment 1, participants used normal pliers: Hand’s opening actions induced pliers’ opening actions and vice versa for hands’ closing actions. Results indicated a compatibility effect between masks’ actions and pliers’ actions. Participants were faster to press the button in response to the target symbol when opening and closing actions of the masks were congruent with the corresponding actions of the hand. In Experiment 2 participants used inverse pliers: Hand’s opening actions involved pliers’ closing actions and vice versa. In this situation, results showed that the congruency of masks’ actions occurred with pliers’ actions and not hand’s actions. Altogether, these findings demonstrate that intention of use is preferentially based on the representation of tool actions, and have important implications for the domain of neuropsychology of tool use and the theories of goal-directed behavior. 相似文献
96.
Occipital gamma activation during Vipassana meditation 总被引:1,自引:0,他引:1
Long-term Vipassana meditators sat in meditation vs. a control rest (mind-wandering) state for 21 min in a counterbalanced
design with spontaneous EEG recorded. Meditation state dynamics were measured with spectral decomposition of the last 6 min
of the eyes-closed silent meditation compared to control state. Meditation was associated with a decrease in frontal delta
(1–4 Hz) power, especially pronounced in those participants not reporting drowsiness during meditation. Relative increase
in frontal theta (4–8 Hz) power was observed during meditation, as well as significantly increased parieto-occipital gamma
(35–45 Hz) power, but no other state effects were found for the theta (4–8 Hz), alpha (8–12 Hz), or beta (12–25 Hz) bands.
Alpha power was sensitive to condition order, and more experienced meditators exhibited no tendency toward enhanced alpha
during meditation relative to the control task. All participants tended to exhibit decreased alpha in association with reported
drowsiness. Cross-experimental session occipital gamma power was the greatest in meditators with a daily practice of 10+ years,
and the meditation-related gamma power increase was similarly the strongest in such advanced practitioners. The findings suggest
that long-term Vipassana meditation contributes to increased occipital gamma power related to long-term meditational expertise
and enhanced sensory awareness. 相似文献
97.
Marc J.-M. Macé Arnaud Delorme Ghislaine Richard Michèle Fabre-Thorpe 《Animal cognition》2010,13(3):405-418
The ability of monkeys to categorize objects in visual stimuli such as natural scenes might rely on sets of low-level visual
cues without any underlying conceptual abilities. Using a go/no-go rapid animal/non-animal categorization task with briefly
flashed achromatic natural scenes, we show that both human and monkey performance is very robust to large variations of stimulus
luminance and contrast. When mean luminance was increased or decreased by 25–50%, accuracy and speed impairments were small.
The largest impairment was found at the highest luminance value with monkeys being mainly impaired in accuracy (drop of 6%
correct vs. <1.5% in humans), whereas humans were mainly impaired in reaction time (20 ms increase in median reaction time
vs. 4 ms in monkeys). Contrast reductions induced a large deterioration of image definition, but performance was again remarkably
robust. Subjects scored well above chance level, even when the contrast was only 12% of the original photographs (≈81% correct
in monkeys; ≈79% correct in humans). Accuracy decreased with contrast reduction but only reached chance level -in both species-
for the most extreme condition, when only 3% of the original contrast remained. A progressive reaction time increase was observed
that reached 72 ms in monkeys and 66 ms in humans. These results demonstrate the remarkable robustness of the primate visual
system in processing objects in natural scenes with large random variations in luminance and contrast. They illustrate the
similarity with which performance is impaired in monkeys and humans with such stimulus manipulations. They finally show that
in an animal categorization task, the performance of both monkeys and humans is largely independent of cues relying on global
luminance or the fine definition of stimuli. 相似文献
98.
Arnaud Badets Charles H. Shea 《Quarterly journal of experimental psychology (2006)》2013,66(2):377-386
The purpose of this experiment was to assess whether learning an action through observation is enhanced by the intention to reproduce the observed behaviour. Two groups of participants observed a model practise a timing task and performed a 24-hour delayed retention test. Participants in the first group of observers were explicitly instructed that they would be required to execute the timing task that they had observed as accurately as possible during the delayed retention test. Observers in the second group were instructed that they would be required to describe as accurately as possible the behaviour that they had observed. A control group of participants, who did not observe the model, was also administered the delayed retention test. The results of the retention test indicated that absolute timing (parameterization) was learned by the observers to the same extent with or without intention to reproduce the task. Indeed, on the retention test absolute timing for the two groups of observers was as effective as that for the models. However, observing with an intention to reproduce the task was beneficial for learning the movement's relative timing structure. Results are discussed with respect to a potential mechanism by which intention enhances observation. 相似文献
99.
Dr Francoise Jermann Martial van der Linden Arnaud D'Argembeau 《Memory (Hove, England)》2013,21(4):364-373
Relatively few studies have examined memory bias for social stimuli in depression or dysphoria. The aim of this study was to investigate the influence of depressive symptoms on memory for facial information. A total of 234 participants completed the Beck Depression Inventory II and a task examining memory for facial identity and expression of happy and sad faces. For both facial identity and expression, the recollective experience was measured with the Remember/Know/Guess procedure (Gardiner & Richardson-Klavehn, 2000). The results show no major association between depressive symptoms and memory for identities. However, dysphoric individuals consciously recalled (Remember responses) more sad facial expressions than non-dysphoric individuals. These findings suggest that sad facial expressions led to more elaborate encoding, and thereby better recollection, in dysphoric individuals. 相似文献
100.
R. C. Honey Catherine Pye Yvonne Lightbown Veremundo Rey Geoffrey Hall 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1992,45(4):327-347
In four experiments we investigated the role of contextual cues in the habituation of neophobia in rats. Experiment 1 showed that the consumption of a novel flavour increased across a series of presentations in one context (A) but fell when the flavour was subsequently presented in a second, novel, context (B). In Experiments 2 and 3, subjects again received exposure to a flavour in context A, but also were familiarized with the test context, B. These subjects consumed the flavour with equal readiness, whether it was presented in Context A or in Context B at test. Experiment 4 replicated the results of Experiment 1 and also showed that the consumption of a novel flavour was not influenced by whether it was presented in a novel or a familiar context. Several mechanisms by which the novelty or familiarity of the context might interact with the novelty or familiarity of the flavour were discussed. 相似文献