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281.
An existing large data set, the Health and Retirement Study (HRS) with the subsequent addition of the Consumption and Activities Mail Survey (CAMS) data, provides a rich data set for the examination of the activities of older adults. In this study HRS and CAMS data are used to examine relationships between various activities of daily living (ADLs) and well-being in older adults. Using structural equation modeling, influences of direct and indirect factors that affect older individuals' cognitive and emotional well-being are analyzed. The data suggest ability to perform ADLs has little to do with cognitive well-being, but is an influential factor in determining emotional well-being.  相似文献   
282.
The digital era has permitted rapid transfer of peer knowledge regarding products and services. In the present research, we explore the value of specific types of word-of-mouth information (numeric ratings and text commentary) for improving forecasts of consumption enjoyment. We present an anchoring-and-adjustment model in which the relative forecasting error associated with ratings and commentary depends on the extent to which consumer and reviewer have similar product-level preferences. To test our model, we present four experiments using a range of hedonic stimuli. Implications for the provision of consumer WOM are discussed.  相似文献   
283.
Hypothalamic-pituitary-adrenal (HPA) axis reactivity to stress is posited to play a role in the intergenerational transmission of risk for psychopathology and other negative outcomes in the offspring of depressed parents. We tested the hypothesis that the joint, interactive effects of exposure to parental depression during early childhood and parental hostility impact the development of young children’s stress physiology and early emerging behavior problems. A sample of 165 preschool-age children (81 boys, 84 girls), of whom 103 had a parent with a history of depression, was exposed to a stress-inducing laboratory task, and five salivary cortisol samples were obtained. Parents completed clinical interviews and an observational parent–child interaction task. We found that the offspring exposed to maternal depression during early childhood and whose parents displayed hostile parenting behaviors during an observational task evidenced high and increasing cortisol levels in response to a laboratory stressor. In addition, the total amount of exposure to maternal depression over the child’s life exerted a dose–response effect on the positive relation between parental hostility and child observed oppositional behavior. This study underscores the importance of the early rearing environment on young children’s stress physiology and early emerging behavior problems.  相似文献   
284.
This 3-wave, 12-month longitudinal study investigated how protean career orientation (PCO) influences unemployed people's self-esteem, job search activity, employment perceived job improvement and perceived career growth over time. Panel data analysis with a sample of 186 people revealed that PCO was significantly associated with increased self-esteem, job search activity and reemployment. The effect of self-esteem on job search activity was mediated by PCO. PCO was significantly associated with job improvement and career growth once reemployed and the relationship between PCO and career growth was mediated by job improvement. PCO declined once participants become reemployed. Implications for how career counselors can develop career transitions programs that facilitate a PCO are presented.  相似文献   
285.
The episodic buffer component of working memory was examined in children with attention deficit/hyperactivity disorder (ADHD) and typically developing peers (TD). Thirty-two children (ADHD = 16, TD = 16) completed three versions of a phonological working memory task that varied with regard to stimulus presentation modality (auditory, visual, or dual auditory and visual), as well as a visuospatial task. Children with ADHD experienced the largest magnitude working memory deficits when phonological stimuli were presented via a unimodal, auditory format. Their performance improved during visual and dual modality conditions but remained significantly below the performance of children in the TD group. In contrast, the TD group did not exhibit performance differences between the auditory- and visual-phonological conditions but recalled significantly more stimuli during the dual-phonological condition. Furthermore, relative to TD children, children with ADHD recalled disproportionately fewer phonological stimuli as set sizes increased, regardless of presentation modality. Finally, an examination of working memory components indicated that the largest magnitude between-group difference was associated with the central executive. Collectively, these findings suggest that ADHD-related working memory deficits reflect a combination of impaired central executive and phonological storage/rehearsal processes, as well as an impaired ability to benefit from bound multimodal information processed by the episodic buffer.  相似文献   
286.
While activation of the hypothalamic‐pituitary‐adrenal (HPA) axis is an adaptive response to stress, excessive HPA axis reactivity may be an important marker of childhood vulnerability to psychopathology. Parenting, including parent affect during parent–child interactions, may play an important role in shaping the developing HPA system; however, the association of parent affect may be moderated by child factors, especially children's emerging self‐regulatory skills. We therefore tested the relationship between parent affectivity and 160 preschoolers’ cortisol reactivity during a laboratory visit, examining children's effortful control (EC) as a moderator. Greater parent negative affectivity was related to greater initial and increasing cortisol over time, but only when children were low in EC. Higher parent positive affectivity was related to a higher baseline cortisol for children with low EC and lower baseline cortisol for children with high EC. Results indicate that children's EC moderates the extent to which parent affect shapes stress reactive systems in early childhood.  相似文献   
287.
This qualitative study explored concept of self and its connection to resilience among 35 elderly Israeli men and women, who live in a war zone along the border with Gaza. The participants were asked to tell their life stories and to answer questions that dealt with hardships they have faced, including the security threat that characterizes the area. Analyses of the interviews revealed 13 overall themes. The major theme discussed in this article centers on the interviewees’ self concept of being ideological pioneers, who have a strong belonging to the settlements they created in the desert. We conclude that this self-concept relates to resilience among this population, in spite of the hardships they have faced on the personal, familial, communal and social-political levels.  相似文献   
288.
Two experiments examined pigeons' generalization to intermediate forms following training of concept discriminations. In Experiment 1, the training stimuli were sets of images of dogs and cats, and the transfer stimuli were head/body chimeras, which humans tend to categorize more readily in terms of the head part rather than the body part. In Experiment 2, the training stimuli were sets of images of heads of dogs and cats, and the intermediate stimuli were computer-generated morphs. In both experiments, pigeons learned the concept discrimination quickly and generalized with some decrement to novel instances of the categories. In both experiments, transfer tests were carried out with intermediate forms generated from both familiar and novel exemplars of the training sets. In Experiment 1, the pigeons' transfer performance, unlike that of human infants exposed to similar stimuli, was best predicted by the body part of the stimulus when the chimeras were formed from familiar exemplars. Spatial frequency analysis of the stimuli showed that the body parts were richer in high spatial frequencies than the head parts, so these data are consistent with the hypothesis that categorization is more dependent on local stimulus features in pigeons than in humans. There was no corresponding trend when the chimeras were formed from novel exemplars. In Experiment 2, when morphs of training stimuli were used, response rates declined smoothly as the proportion of the morph contributed by the positive stimulus fell, although results with morphs of novel stimuli were again less orderly.  相似文献   
289.
Self-enhancement bias has been studied from 2 perspectives: L. Festinger's (1954) social comparison theory (self-enhancers perceive themselves more positively than they perceive others) and G. W. Allport's (1937) self-insight theory (self-enhancers perceive themselves more positively than they are perceived by others). These 2 perspectives are theoretically and empirically distinct, and the failure to recognize their differences has led to a protracted debate. A new interpersonal approach to self-enhancement decomposes self-perception into 3 components: perceiver effect, target effect, and unique self-perception. Both theoretical derivations and an illustrative study suggest that this resulting measure of self-enhancement is less confounded by unwanted components of interpersonal perception than previous social comparison and self-insight measures. Findings help reconcile conflicting views about whether self-enhancement is adaptive or maladaptive.  相似文献   
290.
The so called "emotion learning" literature describes the ability of distressing and aversive unconditioned stimuli to classically condition a learned avoidance response. In order to investigate the impact of experience with noxious stimuli in one conditioning context on learning and memory performance in a separate, non-aversively motivated task, juvenile recognition ability was examined in adult female rats exposed previously to one of two environmental stressors. In particular, experimental adult rats were either socially defeated by exposure to an aggressive conspecific rat or fear conditioned using single or multiple pairings with footshock prior to performance of the social recognition task. Experiment 1 established that repeated exposure to a single juvenile resulted in social memory formation reflected in decreased social investigation from the first to the second exposure. Experiment 2 documented that both single and multiple pairings of an environment with footshock produced robust freezing behavior (90-95% suppression of activity). In addition, fear conditioning produced a non-specific 5-60% increase in social investigation time in both single and multiple-pairing fear conditioned groups which confounded the ability of the social recognition measure to assess effects of fear conditioning on learning and memory performance per se. In contrast, Experiment 3 documented that when social recognition memory performance was impaired to 85% of control levels by imposition of a 2 h delay, exposure to a social defeat stressor reinstated optimal social recognition memory performance. These findings suggest that the after effects of fear conditioning include non-specific alteration of social investigation whereas exposure to conspecific aggression enhances subsequent social recognition memory.  相似文献   
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