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511.
The persuasive effect of character structure--defined as a person's organized set of drives, dispositions, and satisfactions with which they approach the world--was assessed in the context of printed advertising. Subjects were exposed to one of two levels of argument strength (strong versus weak) and one of two levels of message spokesperson (celebrity versus noncelebrity) in a printed-advertising task. Subjects classified as Other-directed, individuals who possess a strong need to get along with others, exhibited greater attitudinal responsiveness to the test advertisement as measured on a composite attitude scale than did those classified as Inner-directed, needing to get ahead, or succeed. Other-directed subjects' attitude scores were more responsive to the message source than were the comparable scores of Inner-directed subjects. Results regarding argument strength were not significant but suggest that Other-directed attitudes are influenced by a combination of textual arguments and social cues.  相似文献   
512.
Although distress tolerance is an emerging construct of empirical interest, we know little about its temporal change, developmental trajectory, and prospective relationships with maladaptive behaviors. The current study examined the developmental trajectory (mean- and individual-level change, and rank-order stability) of distress tolerance in an adolescent sample of boys and girls (N?=?277) followed over a four-year period. Next we examined if distress tolerance influenced change in Externalizing (EXT) and Internalizing (INT) symptoms, and if EXT and INT symptoms in turn influenced change in distress tolerance. Finally, we examined if any of these trends differed by gender. Results indicated that distress tolerance is temporally stable, with little mean- or individual-level change. Latent growth models reported that level of distress tolerance is cross-sectionally associated with both EXT and INT symptoms, yet longitudinally, only associated with EXT symptoms. These results suggest that distress tolerance should be a focus of research on etiology and intervention.  相似文献   
513.
I use measures of interpersonal involvement specific to differential association theory to explain variation within the jamband subculture. Specifically, I examine the relationship between the differential association modalities (frequency, intensity, priority, and duration) and the affective meanings (evaluation, potency, and activity) associated with six behaviors that are relevant to that subculture. I expect the modalities to be related positively to the evaluation and potency of four prosocial (what I term “kynd”) behaviors (to barter, to follow a band, to share, to trade music) and negatively to the evaluation and potency of two “unkynd” behaviors (to talk down, to threaten). Using data from self-administered surveys (n = 379), I find that frequency and intensity predict variation in the affective meaning of kynd and unkynd behaviors. However, priority and duration generally do not predict variation in the affective meaning of kynd and unkynd behaviors.  相似文献   
514.

Background

Low birth weight and low 5-min Apgar scores have been associated with developmental delay, while older maternal age is a protective factor. Little is known about trajectories and predictors of developmental skills in infant twins, who are generally born with lower birth weights, lower Apgar scores and to older mothers.

Methods

Developmental skills were assessed at 3, 6, 9, 12, 18 and 24 months using the Ages and Stages Questionnaires in 152 twins from the Birmingham Registry for Twin and Heritability Studies. Multilevel spline and linear regression models (adjusted for gestational age, gender, maternal age) were used to estimate developmental trajectories and the associations between birth weight, maternal age and Apgar scores on developmental skills.

Results

Twins performed worse than singletons on communication, gross motor, fine motor, problem solving and personal-social skills (p < 0.001). Twins caught up around 6 months (score within −1 standard deviation of norm), except on gross motor skills, which did not catch up until after the age of 12 months. A one-year increase in maternal age was significantly associated with decreases in gross motor and personal–social z-scores of up to −0.09, whereas one unit increases in Apgar score increased z-scores up to 0.90 (p < 0.01).

Conclusions

Healthy twins should be considered at a higher risk for developmental delay. Whether these results are comparable to preterm singletons, or whether there are twin-specific issues involved, should be further investigated in a study that uses a matched singleton control group.  相似文献   
515.
Mass customized products, compared with mass marketed alternatives, offer advantages for optimizing performance outcomes, improving aesthetic appeal, and matching products' symbolic meanings with consumers' expressive desires. Despite having identified these value drivers for mass customized products, extant research has not connected those value drivers to individual differences among consumers. As a result, researchers' and practitioners' abilities to predict consumer value for mass customized products remain limited. This study advances and tests a model of individual differences associated with the perceived value of a customized product and mediated by involvement and perceived risk. A field survey administered to a sample of 240 participants provided data to test the model. Path analysis using structural equations modeling suggests that consumer value for mass customized products differs according to individual differences in need for uniqueness, need for optimization, and centrality of visual product aesthetics. Results also suggest that product category involvement and perceived risk are informative theoretical perspectives from which to study consumer value for mass customized products. The findings hold implications for how firms should approach the design of mass customization toolkits and how they should structure marketing communications promoting mass customized products. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   
516.
Individual social differences have been addressed in recent studies, and the oxytocin receptor gene (OXTR) is the major candidate in explaining various social phenotypes. To study the association between a well-known haplotype (rs53576) of OXTR and children's prosocial behavior and its relationship with theory of mind (ToM) ability, 87 children (aged 3 to 5 years old) participated in 3 prosocial tasks and ToM performance experiments. Participants who were homozygous for the G allele (GG) exhibited more prosocial behaviors than did those with 1 or 2 copies of the A allele (AA), and GG carriers also displayed better ToM ability than did AA individuals. Further tests showed differences between genotypes in helping and comforting, albeit not in sharing. The results demonstrated that OXTR rs53576 was related to individual differences in ToM and was associated with prosocial behavior.  相似文献   
517.
药物成瘾会导致相关神经环路的结构和功能长期改变.大量新的研究证据表明,在DNA序列不变的情况下,药物成瘾可通过影响不同亚型DNA甲基转移酶(DNMTs)的表达,使脑内多个相关核团发生DNA甲基化以及基因表达的改变,进而导致神经元功能的可塑性变化.因此,DNA甲基化被视作导致成瘾行为长期存在的可能机制之一.结合近几年来的重要发现,本文将重点讨论相关脑区的DNA甲基化在成瘾行为发生发展过程中的作用,以及成瘾药物影响DNA甲基化水平的可能机制,并试图提出可深入的研究展望.  相似文献   
518.
Based on previous research that violations of perfect duties cause stronger correspondent inferences than violations of imperfect ones, the authors performed four experiments to generalize this effect to trust. In Experiment 1, abstract violations of perfect duties resulted in less trust than violations of imperfect ones for specific trust scenarios. In Experiments 2 and 3, the authors experimented with different levels of abstractness of the duty violations and obtained similar effects. Experiment 4 was concerned with generalizing further—from duty violations in one situation to trust in a different situation. Although mostly consistent with the findings from Experiments 1–3, the data also demonstrated partial generalization for violations of both perfect and imperfect duties.  相似文献   
519.
孕期使用毒品可影响胎儿大脑的正常发育,导致脑内神经递质系统异常以及行为的改变.近年来不断有研究证据提示,胚胎期接触可卡因、吗啡等成瘾药物,可以影响神经细胞的增殖、迁移或凋亡等发育过程,使中脑皮层边缘系统中多巴胺、GABA、谷氨酸等神经元形态、受体功能以及突触可塑性发生改变,从而导致子代的学习记忆和成瘾易感性等行为异常.本文将从行为、神经发育、递质系统以及脑功能等层面归纳胚胎期用药对成瘾相关行为影响机制的重要研究进展,并试图提出可能的研究展望.  相似文献   
520.
Therapists are unable to provide a comprehensive account of therapy as an intelligible activity. This is at least partly due to the unresolved problem of explaining how phenomenology is even possible. An alternative to providing a comprehensive account of therapy is to take the fact of phenomenology for granted and provide just an outline account of how therapy heals. One way this can be achieved is to set therapy in the context of medical anthropology which will facilitate a view of therapy as just another healing ritual. Insight into how healing rituals heal is provided in this paper by a long and in-depth look at the so-called ‘paradox’ of the placebo effect. This will reveal the so-called ‘placebo effect’ as a misunderstood, modern example of healing ritual self-healing. In fact, the single term ‘placebo effect’ will be abandoned and replaced by the two concepts of ‘SMCH’ (‘specifically modified consultation and health care’) and ‘RMH’ (‘response to modified health care’). These two concepts provide an outline explanation of how all healing rituals heal and so provide an outline explanation of how the healing ritual of therapy heals, also. At least one problem arises out of explaining therapy as healing ritual self-healing, namely that this conception conflicts with the idea in therapy circles that, in therapy, it is the relationship that counts. Nonetheless, it will be maintained that the purpose of therapy is healing, that the healing that is achieved is self-healing and that its fulfilment is not dependent upon one-to-one relationships. Finally, it will be argued that the further development of therapy requires a better understanding of what aids and obstructs psycho-emotional self-healing.  相似文献   
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