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161.
电击信号应激对大鼠体液免疫及内分泌功能的影响 总被引:19,自引:1,他引:18
研究了足电击及以电击装置为信号刺激所诱发的情绪应激对大鼠原发性体液免疫反应及内分泌的影响。 结果表明每天10分钟,共6天的足电击对大鼠抗特异性抗原OVA的原发性体液免疫反应无明显作用,而此电击作 用结合每天10分钟,共8天的情绪应激则可显著降低大鼠体液免疫反应及脾脏指数。同时该应激可显著提高大鼠 血儿茶酚胶和皮质酮水平。该研究证明了情绪应激对大鼠体液免疫功能的调节作用,并对交感神经系统和下丘脑- 垂体-肾上腺(HPA)轴在其中所起的作用进行了初步探讨。 相似文献
162.
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164.
Yan Z 《Developmental psychology》2006,42(3):418-428
This study aimed at analyzing complex relationships among Internet use, Internet users, and conceptual understanding of the Internet. It used path models to examine factors related to Internet use (duration of Internet use, frequency of Internet use, and informal Internet classes) and Internet users (age and gender) in affecting understanding of the technical and social complexity of the Internet for 322 elementary and middle school students. The findings of the study indicate that (a) age of young Internet users had predominant effects on both the technical and social understanding of the Internet; (b) frequency of Internet use and informal Internet classes had small but significant effects on social understanding, but no effect on technical understanding; and (c) technical understanding had a unidirectional effect on social understanding. The implications of these findings for the implementation of the Children's Internet Protection Act are discussed. 相似文献
165.
Children, adolescents, and the internet: a new field of inquiry in developmental psychology 总被引:1,自引:0,他引:1
With this special section on children, adolescents, and the Internet, we survey the state of a new field of inquiry in developmental psychology. This field is important because developmentalists need to understand how children and adolescents live in a new, massive, and complex virtual universe, even as they carry on their lives in the real world. We have selected six empirical articles to showcase various aspects of child and adolescent development in this virtual universe. These articles reflect three major themes of this new field: communication on the Internet; cognitive development, academic achievement, and the Internet; and adolescents in a globalized Internet world. These three sections reflect one of our major editorial goals: to sample various relevant aspects of development as they relate to the Internet. The selection of articles reflects a second editorial goal: to sample both the positive and negative aspects of the virtual world in which children and adolescents are increasingly living. Another of our editorial goals was to sample as large an age range as possible. We also utilized a very broad definition of development. Last but not least, we sought out and found methodological diversity. 相似文献
166.
The present study examined the factorial structure of a Chinese language version of the self-report Dimensional Assessment of Personality Pathology Questionnaire in 581 adults. Four factors were extracted (Emotional Dysregulation, Dissocial, Inhibition, and Compulsivity) that are similar to the factors extracted in the scales' normative clinical and general population samples from North America (factor comparability coefficients range from .88 to .96), supporting the idea that this trait structure is invariant across diverse populations. The internal consistency of the scales (Cronbach's alpha) was satisfactory across age and gender groups with the exception of the Intimacy Problems scale. Possible explanations for the poor internal consistency of the Intimacy Problems scale, such as cultural differences in social factors influencing marital and romantic relationships in Chinese populations, as opposed to other populations are discussed. 相似文献
167.
168.
中学生不同焦虑水平与认知策略研究 总被引:9,自引:2,他引:7
使用测试方式对中学生的焦虑水平和认知策略之间的关系进行了研究。结果发现,在7钟认知策略中能力认识、失败归因、命运控制和社会关系4种认知策略在三个级别的焦虑组之间存在显著差异,焦虑水平高的人倾向于使用否定自身能力、选取失败、悲惨宿命论和消极社会关系认知策略。除成就认识外.其他认知策略不存在性别差异,女性倾向于产生低成就认知。 相似文献
169.
Ingrid P. Hensley James E. Lawler Guanping Zheng Shenggang Li 《Integrative psychological & behavioral science》2001,36(4):275-292
The borderline hypertensive rat (BHR) responds to environmental and dietary stressors with elevated blood pressure. The first
two months of a high salt diet appear to be the time of greatest sensitivity to salt effects on the blood pressure of BHR.
The current study was conducted to examine whether exposure to salt diets varying in duration for up to two months differentially
affects baseline blood pressures (systolic, SBP, and diastolic, DBP) and blood pressure responses to novel acoustic stimuli
in BHR and normotensive Wistar-Kyoto (WKY) rats. Male BHR and WKY were fed a control (1%) salt diet or a high (8%) salt diet
for 1, 1.5, 2.5, or 8.5 weeks. SBP and DBP responses to an acoustic stimulus (85 dB, 3 kHz) were measured upon completion
of the diets at 12 weeks of age. Ten acoustic trials (one stimulus/minute) were presented and blood pressure responses were
recorded in 2-second blocks spanning the 10 seconds prior to and following stimulus presentation. BHR had higher resting SBP
and DBP than WKY, and 8.5 weeks of 8 percent salt increased SBP markedly in BHR. SBP and DBP labilities in the initial trial
were greater in BHR than WKY with high salt diet durations of 2.5 and 8.5 weeks producing greater lability in later trials.
Few differences were noted in pressor responses, but BHR had more dramatic depressor responses than WKY in early trials, and
BHR pressures had a more dramatic return to baseline. It appears that genetic history and salt diet can affect blood pressure
lability and recovery in response to novel stimuli in genetically susceptible animals. 相似文献
170.