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251.
Caroline Knight Malcolm Patterson Jeremy Dawson Jayne Brown 《European Journal of Work and Organizational Psychology》2017,26(5):634-649
This study evaluated whether a participatory action research intervention with nursing staff on acute care older people National Health Service wards in the United Kingdom was effective for increasing work engagement. Mediation analyses between job resources (social support, influence in decision-making), job demands, work-related needs (autonomy, competence, relatedness), and work engagement explored the presumed psychological mechanisms underlying the intervention. A non-randomized, matched control group, pretest, post-test design involved three intervention and five control wards. A significant decrease in relatedness, and a borderline significant decrease in competence, was observed in the intervention group compared to the control group, with no effect on work engagement (N = 45). Work-related needs mediated between resources and work engagement, supporting the job demands-resources model and self-determination theory as an underlying explanatory theory. Intervention implementation was difficult, highlighting the need for participant and organizational readiness for change, and strong management support. This is the first known study to apply participatory techniques to increase work engagement in nursing staff and explore the underlying explanatory psychological mechanisms, offering a novel means of taking work engagement research forward. Crucially, it highlights the challenges involved in intervention research and the importance of including evaluations of intervention implementation alongside statistical evaluations to avoid erroneous conclusions. 相似文献
252.
Knight DC Smith CN Cheng DT Stein EA Helmstetter FJ 《Cognitive, affective & behavioral neuroscience》2004,4(3):317-325
Previous functional magnetic resonance imaging (fMRI) studies have characterized brain systems involved in conditional response
acquisition during Pavlovian fear conditioning. However, the functional neuroanatomy underlying the extinction of human conditional
fear remains largely undetermined. The present study used fMRI to examine brain activity during acquisition and extinction
of fear conditioning. During the acquisition phase, participants were either exposed to light (CS) presentations that signaled
a brief electrical stimulation (paired group) or received light presentations that did not serve as a warning signal (control
group). During the extinction phase, half of the paired group subjects continued to receive the same treatment, whereas the
remainder received light alone. Control subjects also received light alone during the extinction phase. Changes in metabolic
activity within the amygdala and hippocampus support the involvement of these regions in each of the procedural phases of
fear conditioning. Hippocampal activity developed during acquisition of the fear response. Amygdala activity increased whenever
experimental contingencies were altered, suggesting that this region is involved in processing changes in environmental relationships.
The present data show learning-related amygdala and hippocampal activity during human Pavlovian fear conditioning and suggest
that the amygdala is particularly important for forming new associations as relationships between stimuli change. 相似文献
253.
Knight TA 《Psychological reports》2003,93(1):66-68
Instructions for the Matrix Reasoning subtest of the WAIS-III do not communicate to examinees that the subtest is untimed. The present study examined what percentage of participants (34 women, 26 men, M age = 20.1; 55 Caucasian, 3 African American, 2 Hispanic) made the assumption that Matrix Reasoning was timed, and its effect on examinees' scores. 55% of participants receiving standard instructions retrospectively reported assuming the subtest was timed, and those who did not assume Matrix Reasoning was timed scored significantly higher than participants who did. Participants receiving additional instructions that clarified the untimed nature of Matrix Reasoning scored significantly higher than those receiving standard instructions who believed the subtest was timed. 相似文献
254.
Visual implicit memory in the left hemisphere: evidence from patients with callosotomies and right occipital lobe lesions 总被引:2,自引:0,他引:2
Yonelinas AP Kroll NE Baynes K Dobbins IG Frederick CM Knight RT Gazzaniga MS 《Psychological science》2001,12(4):293-298
Identification of visually presented objects and words is facilitated by implicit memory for past visual experiences with those items. Several behavioral and neuroimaging studies suggest that this form of memory is dependent on perceptual processes localized in the right occipital lobe. We tested this claim by examining implicit memory in patients with extensive right occipital lobe lesions, using lexical-decision, mirror-reading, picture-fragment, and word-fragment-completion tests, and found that these patients exhibited normal levels of priming. We also examined implicit memory in patients with complete callosotomies, using standard and divided-visual-field word-fragment-completion procedures, and found that the isolated left hemisphere exhibited normal priming effects. The results indicate that the right occipital lobe does not play a necessary role in visual implicit memory, and that the isolated left hemisphere can support normal levels of visual priming in a variety of tasks. 相似文献
255.
256.
The hypothesis that the perceptual organization dysfunction of patients with poor premorbid schizophrenia is due to a deficit in global visual sensory store processing was tested by assessing their ability to process symmetrical configurations that develop early and have strong prepotent structures. Two same-different judgment tasks in which performance varies as a function of the symmetrical organization and task demands were administered to participants with good and poor premorbid schizophrenia, those with mood disorders, and normal controls. Like the other groups, poor premorbid schizophrenics' latency and error response patterns closely paralled the a priori model of adequate processing. The results support their competence in perceptually processing symmetrical configurations and disconfirm the hypothesis that their input deficiencies represent a general deficiency in all forms of perceptual organization. The implications for specifying their early input dysfunction are discussed. 相似文献
257.
The present study examined the extent to which childhood play activities predict future sport participation by women. Eighty-four college women (40 Division III varsity athletes and 44 nonathletes) at a predominantly White liberal arts school in the Southwest completed a questionnaire that measured their adult experiences with sports as well as their childhood play activities. The results revealed that playing with masculine (rather than feminine) toys and games, playing in predominantly male or mixed-gender groups, and being considered a tomboy distinguished between women who later became college athletes and those who did not. These findings suggest that childhood play activities should be considered, along with other agents of socialization (i.e., family, peers, coaches), as important factors in predicting future sport participation by females. 相似文献
258.
259.
Helen C. Knight Daniel T. Smith David C. Knight Amanda Ellison 《Quarterly journal of experimental psychology (2006)》2016,69(1):129-149
Attentional control settings have an important role in guiding visual behaviour. Previous work within cognitive psychology has found that the deployment of general attentional control settings can be modulated by training. However, research has not yet established whether long-term modifications of one particular type of attentional control setting can be induced. To address this, we investigated persistent alterations to feature search mode, also known as an attentional bias, towards an arbitrary stimulus in healthy participants. Subjects were biased towards the colour green by an information sheet. Attentional bias was assessed using a change detection task. After an interval of either 1 or 2 weeks, participants were then retested on the same change detection task, tested on a different change detection task where colour was irrelevant, or were biased towards an alternative colour. One experiment included trials in which the distractor stimuli (but never the target stimuli) were green. The key finding was that green stimuli in the second task attracted attention, despite this impairing task performance. Furthermore, inducing a second attentional bias did not override the initial bias toward green objects. The attentional bias also persisted for at least two weeks. It is argued that this persistent attentional bias is mediated by a chronic change to participants’ attentional control settings, which is aided by long-term representations involving contextual cueing. We speculate that similar changes to attentional control settings and continuous cueing may relate to attentional biases observed in psychopathologies. Targeting these biases may be a productive approach to treatment. 相似文献
260.