首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3574篇
  免费   131篇
  2022年   19篇
  2021年   19篇
  2020年   40篇
  2019年   57篇
  2018年   84篇
  2017年   80篇
  2016年   94篇
  2015年   84篇
  2014年   85篇
  2013年   363篇
  2012年   161篇
  2011年   155篇
  2010年   127篇
  2009年   112篇
  2008年   159篇
  2007年   185篇
  2006年   144篇
  2005年   121篇
  2004年   118篇
  2003年   136篇
  2002年   140篇
  2001年   67篇
  2000年   50篇
  1999年   69篇
  1998年   64篇
  1997年   54篇
  1996年   60篇
  1995年   41篇
  1994年   44篇
  1993年   45篇
  1992年   55篇
  1991年   45篇
  1990年   51篇
  1989年   35篇
  1988年   31篇
  1987年   32篇
  1986年   36篇
  1985年   39篇
  1984年   50篇
  1983年   36篇
  1982年   52篇
  1981年   39篇
  1980年   32篇
  1979年   31篇
  1978年   21篇
  1977年   30篇
  1976年   27篇
  1975年   14篇
  1974年   18篇
  1973年   14篇
排序方式: 共有3705条查询结果,搜索用时 15 毫秒
81.
Retail buyers' motivational orientations can influence which tasks they select in order to perform their jobs and which kinds of buying mistakes they may be likely to make. Research reported here found that intrinsically motivated buyers were more likely to use diverse sources of information, to seek and recommend new vendors, to have more positive relationships with vendors and sales personnel, and to make fewer “Type 2” buying errors. Discussion focuses on managerial and theoretical contributions of the findings.  相似文献   
82.
An assumption of the generate/recognize model of direct and indirect memory is that the generation stage is identical on explicit and implicit tests. Two experiments were conducted to examine the generation stage by requiring subjects to write down every word-stem solution they could generate on either an implicit test, a cued-recall test, or a generate/recognize test. In Experiment 1, the subjects studied words and anagrams; target generation was not significantly different on the three tests. However, in Experiment 2, the subjects studied the target words with a context word, and saw either thesame ordifferent context with the test stem. Now the generation stages dissociated, such that the context manipulation had no significant effect on the implicit test, but on the cued-recall test, more targets were generated with the same context words than were generated with different context words. The results argue against the claim that dissociations between implicit and explicit tests are due only to the addition of recognition processes on the explicit test, because the generation processes themselves can be dissociated.  相似文献   
83.
This article examines two questions pertaining to the extension of infertility treatment to postmenopausal women. First, what concepts and principles of infertility practice apply to assisted reproduction for the postmenopausal patient? Second, what role should these concepts play in the development of an ethical justification for extending women's reproductive lives past the menopausal boundary? The argument offered here supports their claim to infertility services on the basis of the formal principle of justice, which requires that similar cases be treated similarly. The cases of many postmenopausal patients are argued to be relevantly similar to classes of patients who already receive assistance in reproduction.  相似文献   
84.
85.
A mother's (prenatal) wish for a girl has, at times, been implicated as an etiological factor for boyhood femininity or its DSM-III-R diagnostic equivalent, the Gender Identity Disorder of Childhood. In one sample of 52 feminine and 52 nonclinical control boys from Los Angeles, the proportion of mothers who recalled a wish for a girl during the pregnancy did not differ significantly between groups (26.9% vs. 19.2%, respectively); however, in both groups, the maternal wish for a girl was significantly more common in sibships in which all of the proband's older siblings were male. In a second sample of 103 feminine boys from Toronto, the maternal wish for a girl was significantly higher than that found in the Los Angeles sample (43.7% vs. 26.9%), but a control group was not available; as in the Los Angeles sample, the maternal wish for a girl was significantly more common in sibships in which all of the proband's older siblings were male. Implications of these findings for further study of maternal influences on boyhood femininity are discussed.  相似文献   
86.
Qualitative reviews of the withdrawal literature have reached inconsistent conclusions regarding the strength of the relationship between promotion and turnover. Several issues were addressed in this study which may account for these inconsistencies. First, we differentiate among three distinct operationalizations of promotion: (1) promotion satisfaction; (2) perceptions of promotional opportunity; and (3) actual promotion. We then conduct quantitative reviews using meta-analytic procedures on turnover and the three operationalizations of promotion. We found no significant relationships between promotion satisfaction and turnoveror between perceived promotional opportunities and turnover. However, a significant negative relationship was found between actual promotion and turnover. Theoretical implication of these findings are presented.  相似文献   
87.
The placement of black children in white families in the US and UK once constituted the majority of transracial adoptions. This is reflected in much of the research to date, and the (sometimes negative) findings continue to influence policy and practice. More recently, in Asia and Latin America, need and demand have led to a relaxation of intercountry adoption laws. Transracial adoptions by Caucasian parents are increasing in number and type; questions about how to facilitate adjustment must be readdressed. These parents of transracially adopted children face the task of striking a balance between racial awareness and cultural integration. Most want to protect their adoptive child's sense of self using knowledge of biological family and county of origin but, at the same time, they must settle the child into a new, sometimes alien, community. This paper provides guidelines for counselling all transracially adoptive families who are concerned about adjustment, but particular reference is made to questions on heritage raised by Caucasian parents of Asian children.  相似文献   
88.
Fee as a variable that could have an impact on college students' perceptions of counseling was explored because of the authentic concerns about college counseling centers needing to charge direct fees for their services. Participants (N = 350) represented a cross-section of potential consumers of psychological services, not just individuals currently receiving services. On an overt level, fees seemed to be less influential in counseling considerations, but were taken into account on a more covert level. This study supports the psychological literature, which suggests that fee is not the most important factor in clients' decisions to seek counseling. Implications for counselors, administrators, researchers, and program planners are discussed.  相似文献   
89.
Two experiments addressed the influences of harmonic relations, melody location, and relative frequency height on the perceptual organization of multivoiced music. In Experiment 1, listeners detected pitch changes in multivoiced piano music. Harmonically related pitch changes and those in the middle-frequency range were least noticeable. All pitch changes were noticeable in the high-frequency voice containing the melody (the most important voice), suggesting that melody can dominate harmonic relations. However, the presence of upper partials in the piano timbre used may have accounted for the harmonic effects. Experiment 2 employed pure sine tones, and replicated the effects of Experiment 1. In addition, the influence of the high-frequency melody on the noticeability of harmonically related pitches was lessened by the presence of a second melody. These findings suggest that harmonic, melodic, and relative frequency height relationships among voices interact in the perceptual organization of multivoiced music.  相似文献   
90.
Results from previous visual search studies have suggested that abrupt onsets produce involuntary shifts of attention (i.e., attentional capture), but discontinuities in simple features such as color and brightness do not (Jonides & Yantis, 1988). In the present study we tested whether feature discontinuities (i.e., “singletons”) can produce attentional capture in a visual search task if defined “locally” or over a small spatial range. On each trial, a variable number of letters appeared, one of which differed from the others in color or intensity. The location of this singleton was uncorrelated with target location. Local discontinuities were created by embedding the letters in a dot texture. In Experiment 1, display size effects for singleton targets were not reduced with the addition of a background dot texture. Similar results were obtained in Experiment 2, regardless of variations in texture density. Experiment 3 confirmed that when targets are defined by a color or intensity singleton, they are detected preattentively, and that increasing texture density yields faster detection. We conclude that the spatial range over which feature discontinuities are defined may influence the guidance of spatial attention, but it has no influence on their ability to capture attention.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号