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31.
Lymnaea stagnalis were operantly conditioned to not perform aerial respiratory behaviour in a specific context (i.e. context-1). The memory for this learned response was reactivated 3 days later in context-1. During the 1 h reconsolidation period following memory reactivation, randomly picked snails were either maintained in context-1 or exposed to a new context (i.e. context-2). One hour later in the post-reconsolidation period, snails in context-1 were placed for 1 h in context-2 and vice-versa. In neither the hypoxic reconsolidation nor the post reconsolidation periods did snails receive a reinforcing stimulus when they opened their pneumostome. All snails were blindly tested for memory 24 h later period in context-2. Only those snails that had been exposed to context-2 during the reconsolidation period exhibited 'memory' for context-2. That is, memory infidelity was observed. Snails exposed to context-2 in only the post-reconsolidation period did not show memory for context-2. The immediate cooling of snails after their exposure to the new context in the reconsolidation period blocked the formation the implanted memory. Snails trained in context-1 and exposed to context-2 in the consolidation period only, also did not have memory for context-2. However, the memory for context-1 could still be recalled following successful implantation of the 'new' memory. All data presented here are consistent with the notion that during the reconsolidation process memory can be updated. 相似文献
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Stephanie D. Smith Haley F. Stephens Karla Repper Janet A. Kistner 《Journal of psychopathology and behavioral assessment》2016,38(4):515-527
This paper examines anger rumination as a risk factor of aggression in typically developing children and high-risk adolescents. Study 1 developed and evaluated the psychometric properties of a self-report measure of children’s anger rumination (Children’s Anger Rumination Scale; CARS) and its association with teacher- and peer-rated overt and relational aggression in school-aged children (n = 254, M age = 10.62). Findings offered support for the reliability and validity of the CARS as well as support for the hypothesis that children who ruminate to anger exhibit elevated levels of overt and relational aggression. Study 2 examined concurrent and prospective relationships between anger rumination and aggression and the moderating effects of trait anger in a sample of male juvenile offenders (n = 119, M age = 16.74). Latent growth curve analyses revealed that the interaction between trait anger and anger rumination predicted initial levels of aggression (i.e., intercept) and changes in aggression over time (i.e., slope). Juvenile offenders who were high in trait anger and ruminated in response to anger exhibited the highest initial levels of aggression. Contrary to our hypothesis, this group did not exhibit greater increases in aggression over time relative to others, but instead they had stably high levels of aggression at each time point. These findings suggest that cognitive-behavioral treatment strategies for aggression may be improved by educating youths about the contributory role of anger rumination in the development of aggression and providing them with adaptive alternatives to coping with feelings of anger. 相似文献
34.
Rosemary Saunders Rachel Singer Helen Dugmore Karla Seaman Fiona Lake 《Reflective Practice》2016,17(4):393-402
Reflection has been identified as key to interprofessional education as it facilitates a focus on interprofessional communication, collaborative practice and professional roles, while contributing to debunking ingrained understandings of roles and behaviours. The aim of this study is to explore the written reflections of nursing students following an interprofessional placement in ambulatory care. A deductive analysis of nursing student reflective journal entries mapped against the university interprofessional framework was conducted. A purposeful sample of 19 graduate entry Master of Nursing Science students participating in a two-week interprofessional educational placement completed a reflective journal relating to an interprofessional placement in ambulatory care. The analysis of the journals found that all students were able to reflect on their interprofessional clinical experience, but the ability to reflect varied between students. Despite the challenges that some nursing students experienced in achieving deep levels of reflection, the study demonstrated the usefulness of incorporating reflective journals into nursing curriculums and as part of interprofessional practicums. 相似文献
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Determined whether six commonly used inventories which are associated with suicide (Hopelessness Scale, Zung Self-Rating Depression Scale, Scale for Suicide Ideation, Reasons for Living Inventory, Suicide Probability Scale, and the Suicide Ideation Questionnaire) overlap; all six were given to 308 undergraduates. A principal components factor analysis yielded four factors with Eigenvalues greater than 1.00. These four factors were labeled Suicidal/Negative Ideas, Reasons for Living, Self-Doubt, and Suicide Desire. Each scale or subscale had a factor loading of .4 or greater on one factor. Only the Survival and Coping Beliefs subscale of the Reasons for Living Inventory and the Suicide Ideation Questionnaire loaded on two factors. Thus, each of these six instruments accounts for unique variance in suicidality. A suicide screening battery that includes all six inventories would take approximately 20 min for college students to complete, and would be valuable in identifying different aspects of suicidality. 相似文献
37.
The goal of the present study was to determine whether gender‐neutral language, used to replace male‐biased language, carries an implicit male bias. Participants read passages in which a target occupation was introduced using either male‐biased or gender‐neutral nouns. A target sentence followed defining the gender of the occupational character. In Experiment 1, participants read target sentences defining the character as a woman more slowly following passages that contained male‐biased nouns and gender‐neutral nouns. In Experiment 2, an additional sentence was added that defined the occupational character as a woman. This information eliminated the reading disruption in Experiment 1 demonstrating that gender‐neutral language can moderate against activation of gender stereotypes when combined with an explicit mention that the occupational character is female. 相似文献
38.
Marieke E. Timmerman Eva Ceulemans Kim De Roover Karla Van Leeuwen 《Behavior research methods》2013,45(4):1011-1023
To achieve an insightful clustering of multivariate data, we propose subspace K-means. Its central idea is to model the centroids and cluster residuals in reduced spaces, which allows for dealing with a wide range of cluster types and yields rich interpretations of the clusters. We review the existing related clustering methods, including deterministic, stochastic, and unsupervised learning approaches. To evaluate subspace K-means, we performed a comparative simulation study, in which we manipulated the overlap of subspaces, the between-cluster variance, and the error variance. The study shows that the subspace K-means algorithm is sensitive to local minima but that the problem can be reasonably dealt with by using partitions of various cluster procedures as a starting point for the algorithm. Subspace K-means performs very well in recovering the true clustering across all conditions considered and appears to be superior to its competitor methods: K-means, reduced K-means, factorial K-means, mixtures of factor analyzers (MFA), and MCLUST. The best competitor method, MFA, showed a performance similar to that of subspace K-means in easy conditions but deteriorated in more difficult ones. Using data from a study on parental behavior, we show that subspace K-means analysis provides a rich insight into the cluster characteristics, in terms of both the relative positions of the clusters (via the centroids) and the shape of the clusters (via the within-cluster residuals). 相似文献
39.
Although Konkle, Brady, Alvarez, and Oliva (2010, Journal of Experimental Psychology: General, 139(3), 558) claim that visual long-term memory (VLTM) is organized on underlying conceptual, not perceptual, information, visual memory results from visual search tasks are not well explained by this theory. We hypothesized that when viewing an object, any task-relevant visual information is critical to the organizational structure of VLTM. In two experiments, we examined the organization of VLTM by measuring the amount of retroactive interference created by objects possessing different combinations of task-relevant features. Based on task instructions, only the conceptual category was task relevant or both the conceptual category and a perceptual object feature were task relevant. Findings indicated that when made task relevant, perceptual object feature information, along with conceptual category information, could affect memory organization for objects in VLTM. However, when perceptual object feature information was task irrelevant, it did not contribute to memory organization; instead, memory defaulted to being organized around conceptual category information. These findings support the theory that a task-defined organizational structure is created in VLTM based on the relevance of particular object features and information. 相似文献
40.
Martin Van Boekel Karla A. Lassonde Edward J. O’Brien Panayiota Kendeou 《Memory & cognition》2017,45(1):168-181
The knowledge revision components framework (KReC) outlines the basic comprehension processes and text factors that can be accentuated to increase the potential for knowledge revision during reading. The goal of the present study was to explore source credibility as one such text factor. In Experiment 1, we established the utility of a set of refutation texts in influencing knowledge revision. Participants read ten refutation and ten control texts. The participants had faster reading times and higher posttest scores for the refutation than for the control texts, providing evidence for knowledge revision. In Experiment 2, we examined the influence of source credibility under normal reading conditions. Participants read 20 refutation texts, ten with high-credibility and ten with low-credibility sources. The reading times and posttest scores suggested that knowledge revision unfolded successfully, independent of credibility. Using the same texts, in Experiment 3 we examined the influence of direct instructions that made the credibility of the source of information more salient. When the credibility of the source was made salient, the revision process was disrupted in the low-credibility condition, as evidenced by slower reading times and lower posttest scores than in the high-credibility condition. The results add to our understanding of the factors that constrain knowledge revision during the reading of refutation texts, and are discussed in the context of the extant literature and KReC. 相似文献