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21.
Non‐Bayesian Noun Generalization in 3‐ to 5‐Year‐Old Children: Probing the Role of Prior Knowledge in the Suspicious Coincidence Effect 下载免费PDF全文
Gavin W. Jenkins Larissa K. Samuelson Jodi R. Smith John P. Spencer 《Cognitive Science》2015,39(2):268-306
It is unclear how children learn labels for multiple overlapping categories such as “Labrador,” “dog,” and “animal.” Xu and Tenenbaum (2007a) suggested that learners infer correct meanings with the help of Bayesian inference. They instantiated these claims in a Bayesian model, which they tested with preschoolers and adults. Here, we report data testing a developmental prediction of the Bayesian model—that more knowledge should lead to narrower category inferences when presented with multiple subordinate exemplars. Two experiments did not support this prediction. Children with more category knowledge showed broader generalization when presented with multiple subordinate exemplars, compared to less knowledgeable children and adults. This implies a U‐shaped developmental trend. The Bayesian model was not able to account for these data, even with inputs that reflected the similarity judgments of children. We discuss implications for the Bayesian model, including a combined Bayesian/morphological knowledge account that could explain the demonstrated U‐shaped trend. 相似文献
22.
The importance of intra- and inter-limb relative motion in modelling a whole body coordination skill was examined. Participants were assigned to one of four groups: Full-Body point light model of a cricket bowler, INTRA-LIMB relative motion of the bowling arm, INTER-LIMB relative motions of the right and left wrists or NO-Relative motion, showing only the motions of the right wrist. During 60 acquisition trials, participants viewed the model five times before each 10-trial block. Retention was examined the following day. Although all groups improved on intra-limb coordination of the bowling arm, the INTRA-LIMB and FULL-BODY groups were more accurate than the INTER-LIMB group in acquisition, although these groups did not differ in retention. For inter-limb coordination, the three groups who received relative motion information performed more like the model than the NO-Relative motion group (even though the INTRA-LIMB group did not see the other limb). The amount of information within a display plays a constraining role on acquisition, perhaps more so than the type of information, such that the acquisition of coordination is more an emergent feature of observational learning, rather than a direct approximation of the model. 相似文献
23.
Social loafing was observed as a naturally occurring process in project teams of students working together for 3-4 months. The authors assessed the contributions that member composition (i.e., relational dissimilarity and knowledge, skills, and abilities; KSAs), perceptions of the team's interaction processes (i.e., dispensability and the fairness of the decision-making procedures), and the team's evaluation structure (i.e., identifiability) make toward understanding loafing behavior. Identifiability moderated the impact of dispensability on loafing but not the impact of fairness on loafing. Perceptions of fairness were negatively related to the extent that participants loafed within their team. Specific aspects of relational dissimilarity were positively associated with perceptions of dispensability and negatively associated with perceptions of fairness, whereas KSAs were negatively associated with perceptions of dispensability. 相似文献
24.
Clinician-guided Internet-based cognitive behavioural therapy (iCBT) programs are clinically effective at treating specific anxiety disorders. The present study examined the efficacy of a transdiagnostic Internet-based cognitive behavioural treatment (iCBT) program to treat more than one anxiety disorder within the same program (the Anxiety Program). Eighty six individuals meeting diagnostic criteria for generalized anxiety disorder (GAD), panic disorder, and/or social phobia were randomly assigned to a treatment group, or to a waitlist control group. Treatment consisted of CBT based online educational lessons and homework assignments, weekly email or telephone contact from a clinical psychologist, access to a moderated online discussion forum, and automated emails. An intention-to-treat model using the baseline-observation-carried-forward principle was employed for data analyses. Seventy-five percent of treatment group participants completed all 6 lessons within the 8 week program. Post-treatment data was collected from 38/40 treatment group and 38/38 control group participants, and 3-month follow-up data was collected from 32/40 treatment group participants. Relative to controls, treatment group participants reported significantly reduced symptoms of anxiety as measured by the Generalized Anxiety Disorder - 7 Item, Social Phobia Screening Questionnaire, and the Panic Disorder Severity Rating Scale - Self Report Scale, but not on the Penn State Worry Questionnaire, with corresponding between-groups effect sizes (Cohen’s d) at post-treatment of 0.78, 0.43, 0.43, and 0.20, respectively. The clinician spent a total mean time of 46 min per person over the program, participants rated the procedure as moderately acceptable, and gains were sustained at follow-up. Modifications to the Anxiety program, based on post-treatment feedback from treatment group participants, were associated with improved outcomes in the control group. These results indicate that transdiagnostic programs for anxiety disorders may be successfully administered via the Internet. 相似文献
25.
We tested the ‘learned parameters’ hypothesis as an explanation of the ‘especial skill effect’. Outcome attainment and movement kinematics were recorded for 10 expert and 10 novice players performing basketball free-throw shots at five distances (11-19 ft) with a regular and heavy weight basketball. As predicted, experts performed better than expected relative to the regression equation at the 15 ft, free-throw line with the regular basketball, supporting the ‘especial skill effect’. This effect was not present for the experts when shooting with the heavy ball. Novices did not show an advantage at the free-throw line when performing with either ball. Although the outcome attainment scores support the ‘learned parameters’ hypotheses, kinematic analysis failed to identify differences in the movement pattern for the especial skill, suggesting that these skills (i.e., shooting at different distances) are not governed by separate motor programs. 相似文献
26.
Gavin Ivey 《Psychoanalytic Psychotherapy》2013,27(1):92-95
Wilfred Bion is regarded as a psychoanalytic purist and his austere portrayal of the analytic aim and attitude is often considered to make impossible demands on patient and analyst alike. Not surprisingly, the applicability of Bion's theory and recommended practice to once-weekly psychotherapeutic work is often questioned. Bion is thus ambivalently regarded by psychotherapists as the embodiment of an analytic ideal, whose developmental theories are important, but whose practical utility is doubted, especially in the context of the typical therapeutic setting. This paper seeks to challenge these assumptions by presenting the once-weekly therapy of a woman with attenuated mentalizing capacity and a tendency to destructive acting out. The therapy was guided by the application of central concepts, models and ‘technical’ principles emerging from my understanding of Bion's work. The aim of the paper is to demonstrate that Bion's utility is not confined to formal psychoanalytic settings and that his work may be usefully applied in more modest psychotherapy contexts. 相似文献
27.
Michael J. Brusco J. Dennis Cradit Douglas Steinley Gavin L. Fox 《Multivariate behavioral research》2013,48(1):29-49
Clusterwise linear regression is a multivariate statistical procedure that attempts to cluster objects with the objective of minimizing the sum of the error sums of squares for the within-cluster regression models. In this article, we show that the minimization of this criterion makes no effort to distinguish the error explained by the within-cluster regression models from the error explained by the clustering process. In some cases, most of the variation in the response variable is explained by clustering the objects, with little additional benefit provided by the within-cluster regression models. Accordingly, there is tremendous potential for overfitting with clusterwise regression, which is demonstrated with numerical examples and simulation experiments. To guard against the misuse of clusterwise regression, we recommend a benchmarking procedure that compares the results for the observed empirical data with those obtained across a set of random permutations of the response measures. We also demonstrate the potential for overfitting via an empirical application related to the prediction of reflective judgment using high school and college performance measures. 相似文献
28.
Gavin Rae 《Human Studies》2013,36(2):235-257
Heidegger’s critique of metaphysics is central to his attempt to re-instantiate the question of being. This paper examines Heidegger’s critique of metaphysics by looking at the relationship between metaphysics and thought. This entails an identification of the intimate relationship Heidegger maintains exists between philosophy and metaphysics, an analysis of Heidegger’s critique of this association, and a discussion of his proposal that philosophy has been so damaged by its association with metaphysics that it must be replaced with meditative thinking. It is not quite clear, however, how the overcoming of metaphysical thinking is to occur especially given Heidegger’s insistence that relying on human will to effect an alteration in thinking simply re-instantiates the metaphysical perspective to be overcome. While several critics have argued Heidegger has no solution to this issue, instead holding that thought must simply be open to being’s ‘self’-transformation if and when it occurs, I turn to Heidegger’s notion of trace and a number of scattered comments on the relationship between meditative thinking and willing as non-willing to show Heidegger: (a) was aware of this issue; and (b) tried to resolve it by recognising a reconceptualised notion of willing not based on or emanating from the aggressive willing of metaphysics. 相似文献
29.
Bea Gavin 《Psychodynamic Practice》2013,19(1):83-102
This paper explores how issues of Irish identity and difference expressed themselves in a range of group analytic settings. This Irish dimension has been largely absent in therapy literature. Work on the impact of cultural difference and racism, while very relevant, has not addressed itself to the specific dynamics of the Irish experience in Britain and how this manifests itself in therapy settings. Irishness was understood in a number of different ways in the groups described. For the Irish members, their cultural identity was used both to generate a genuine exploration of difference and the interweaving of personal and cultural events, and, in other circumstances, it was used to create division and to deny early painful family experiences. For the non-Irish members, the Irish experience was simultaneously acknowledged and denied. Acts of apparent inclusion led instead to an experience of exclusion. These experiences reflect the reality of social, political and historical power relations between cultures and how these manifest themselves in groups. A countertransference reaction on the part of the group therapist when identified as Irish, and the impact of this on the group, is also considered. 相似文献
30.
Peter Walker J. Gavin Bremner Kelly Merrick Sarah Coates Elizabeth Cooper Rachel Lawley 《Visual cognition》2013,21(6):733-788
Object drawing can be supported by a number of cognitive resources, each making available visual information about the object being drawn. These resources include perceptual input, short-term visual memory, and long-term visual memory. Each of these resources has the potential to make available distinct forms of visual representation, including viewpoint-specific and viewpoint-independent representations, object-specific and category representations, and separate representations of object colour. We review neuropsychological and developmental evidence supporting these claims, including evidence that the same drawing can reflect the influence of multiple forms of visual representation. Seven experiments are then reported, investigating object drawing by 4- to 6-year-old children, to confirm the support for drawing provided by different forms of visual representation. Young children are selected for investigation because their drawing is relatively unconstrained by culturally determined norms which, in our culture, dictate that objects should be drawn just as they appear from the vantage point of the drawer. To distinguish the support provided by object and category representations, the experiments exploit the privileged links between count nouns as object labels, and representations of object categories. In addition, pre-established representations, visual or otherwise, are precluded from influencing drawing by asking the children to draw novel objects, and by creating novel count nouns with which to label the objects. The results reveal how viewpoint-specific perceptual representations, object-specific representations of shape and of colour, and category representations of shape can each impact on object drawing, and in some circumstances on the same drawing. It appears that simple drawing tasks have the potential to reveal some of the distinct types of representation able to support visual cognition. 相似文献