全文获取类型
收费全文 | 19411篇 |
免费 | 398篇 |
国内免费 | 3篇 |
专业分类
19812篇 |
出版年
2021年 | 160篇 |
2020年 | 261篇 |
2019年 | 250篇 |
2018年 | 386篇 |
2017年 | 368篇 |
2016年 | 408篇 |
2015年 | 311篇 |
2014年 | 377篇 |
2013年 | 1468篇 |
2012年 | 680篇 |
2011年 | 600篇 |
2010年 | 420篇 |
2009年 | 394篇 |
2008年 | 547篇 |
2007年 | 574篇 |
2006年 | 456篇 |
2005年 | 454篇 |
2004年 | 384篇 |
2003年 | 334篇 |
2002年 | 372篇 |
2001年 | 736篇 |
2000年 | 734篇 |
1999年 | 498篇 |
1998年 | 194篇 |
1997年 | 188篇 |
1996年 | 181篇 |
1992年 | 387篇 |
1991年 | 358篇 |
1990年 | 387篇 |
1989年 | 337篇 |
1988年 | 312篇 |
1987年 | 311篇 |
1986年 | 288篇 |
1985年 | 293篇 |
1984年 | 266篇 |
1983年 | 227篇 |
1982年 | 166篇 |
1979年 | 258篇 |
1978年 | 187篇 |
1977年 | 163篇 |
1975年 | 216篇 |
1974年 | 255篇 |
1973年 | 254篇 |
1972年 | 199篇 |
1971年 | 199篇 |
1970年 | 176篇 |
1969年 | 190篇 |
1968年 | 231篇 |
1967年 | 205篇 |
1966年 | 169篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
Perception of classroom environment in Hong Kong: differences between students in junior and senior forms 总被引:2,自引:0,他引:2
Cheng ST 《Adolescence》1999,34(136):793-798
In Hong Kong secondary schools, students in the senior forms take competitive examinations to proceed to the next level, whereas those in the junior forms have to attend school regardless of their ability and motivation. It was hypothesized that this produces different classroom climates. To test this hypothesis, 602 Chinese secondary school students were administered the short version of the Classroom Environment Scale. Significant differences were found, varying by type of school, on the dimensions of Involvement, Task Orientation, Teacher Support, Competition, Order and Organization, Affiliation, Innovation, Rule Clarity, and Teacher Control. These findings are discussed. 相似文献
962.
Taking time seriously. A theory of socioemotional selectivity 总被引:25,自引:0,他引:25
Socioemotional selectivity theory claims that the perception of time plays a fundamental role in the selection and pursuit of social goals. According to the theory, social motives fall into 1 of 2 general categories--those related to the acquisition of knowledge and those related to the regulation of emotion. When time is perceived as open-ended, knowledge-related goals are prioritized. In contrast, when time is perceived as limited, emotional goals assume primacy. The inextricable association between time left in life and chronological age ensures age-related differences in social goals. Nonetheless, the authors show that the perception of time is malleable, and social goals change in both younger and older people when time constraints are imposed. The authors argue that time perception is integral to human motivation and suggest potential implications for multiple subdisciplines and research interests in social, developmental, cultural, cognitive, and clinical psychology. 相似文献
963.
Examined the influence of the quality of the teacher-student relationship on children's subsequent levels of aggression in a sample of 61 second and third-grade children nominated and rated by their teachers as aggressive. The stability of teachers' and children's reports of relationships quality across academic years was in the low to moderate range. Teachers and children showed little agreement in their reports of relationship quality. Teachers' and children's reports of relationship quality in year 1 (Y1) predicted teacher-rated aggression the following year, controlling for Y1 ratings of aggression. Teachers' reports of relationship quality across Y1 and Y2 predicted peer-rated aggression, but not teacher-rated aggression, in Y3, controlling for Y1 aggression. Consistent with a buffering role for teacher-student relationships, a positive teacher-student relationship was of greatest benefit to children whose mothers reported rejecting parenting histories. We discuss implications for school-based prevention programs. 相似文献
964.
Surprisingly, Bartlett's (1932) famous repeated reproduction experiments, in which he found systematically increasing errors in recall from the same people tested over time, have never been successfully replicated. Several studies have attempted partial replications, which were unsuccessful, and their authors concluded that the original observations might not be replicable. We conducted a study modeled closely after Bartlett's procedures: Subjects studied "The War of the Ghosts," took an initial test 15 min later, and then took a delayed test after 1 week. A follow-up test was conducted 6 months later on as many subjects as could be obtained. We did replicate Bartlett's results, in that (1) subjects forgot the story over delays but (2) introduced rationalization and distortion into their accounts of the story, with increases in the proportion of material distorted as retention interval increased. Subjects also imported new propositions at long delays, further confirming Bartlett's empirical observations and conclusions. Bartlett's repeated reproduction results can be replicated. 相似文献
965.
Derenne and Baron (1999) criticized a quantitative literature review by Kollins, Newland, and Critchfield (1997) and raised several important issues with respect to the integration of single-subject data. In their criticism they argued that the quantitative integration of data across experiments conducted by Kollins et al. is a meta-analysis and, as such, is inappropriate. We reply that Kollins et al. offered behavior analysts a technique for integrating quantitative information in a way that draws from the strengths of behavior analysis. Although the quantitative technique is true to the original spirit of meta-analysis, it bears little resemblance to meta-analyses as currently conducted or defined and offers behavior analysts a potentially useful tool for comparing data from multiple sources. We also argue that other criticisms raised by Derenne and Baron were inaccurate or irrelevant to the original article. Our response highlights two main points: (a) There are meaningful quantitative techniques for examining single-subject data across studies without compromising the integrity of behavior analysis; and (b) the healthiest way to refute or question findings in any viable field of scientific inquiry is through empirical investigation. 相似文献
966.
T E Joiner R A Steer A T Beck N B Schmidt M D Rudd S J Catanzaro 《Journal of abnormal psychology》1999,108(2):290-298
Physiological hyperarousal (PH) is an understudied component of the tripartite model of depression and anxiety. This study contributes to the literature on PH, the tripartite model, and anxiety and its disorders, using data from psychotherapy outpatients (n = 2,448), air force cadets (n = 1,335), and undergraduates (n = 284). Psychometrics and exploratory and confirmatory factor analyses showed that PH is a reliable, cohesive, discriminable, and valid construct. Compared with subjective anxiety, PH was more associated to panic versus mood disordered status, and to panic versus generalized anxiety disordered status. As hypothesized, an aspect of anxiety sensitivity (i.e., fear of body sensations) was particularly related to subjective anxiety in the presence of PH. Results support the PH construct as replicable, valid, and clinically important and support the utility of the tripartite and related models for understanding the relation of depressive and anxious syndromes. 相似文献
967.
This study tested the hypothesis that negative affective (NEG) cues activate alcohol concepts more strongly in problem drinkers with high rather than low psychiatric distress (PD) and that a parallel difference applies to activation of NEG concepts by alcohol cues. A lexical decision task assessed memory activation in 36 problem drinkers with high vs. low scores on the Symptom Checklist-90. High PD drinkers displayed activation in each condition; low PD drinkers displayed inhibition. Activation of alcohol concepts by NEG cues correlated with intensity of PD, bias to drink in NEG states, and confidence to avoid drinking in these states. Results corroborate in vivo cue reactivity studies and indicate a functional difference between problem drinkers with high and low PD. 相似文献
968.
A chief goal of this research was to determine whether stimuli and events known to enhance smoking motivation also influence a physiological variable with the potential to index approach motivation. Asymmetry of electroencephalographic (EEG) activity across the frontal regions of the 2 hemispheres (left minus right hemisphere activation) was used to index approach motivation. In theory, if EEG asymmetry sensitively indexes approach dispositions, it should be influenced by manipulations known to affect smoking motivation, that is, exposure to smoking cues and tobacco deprivation. Seventy-two smokers participated in this research and were selectively exposed to a smoking-anticipation condition (cigarettes plus expectation of imminent smoking) following either 24 hr of tobacco withdrawal or ad libitum smoking. Results indicated that EEG asymmetry was increased by smoking anticipation and that smoking itself reduced EEG asymmetry. Results also suggested that smoking anticipation increased overall (bihemispheric) EEG activation. Results were interpreted in terms of major theories of drug motivation. 相似文献
969.
Simoneau TL Miklowitz DJ Richards JA Saleem R George EL 《Journal of abnormal psychology》1999,108(4):588-597
Family psychoeducational programs are efficacious adjuncts to pharmacotherapy for patients with schizophrenic and bipolar disorders, but little is known about what these programs change about families. The authors assessed changes in face-to-face interactional behavior over 1 year among families of bipolar patients who received a 9-month family-focused psychoeducational therapy (FFT; n = 22) or crisis management with naturalistic follow-up (CMNF; n = 22), both administered with maintenance pharmacotherapy. Members of families who received FFT showed more positive nonverbal interactional behavior during a 1-year posttreatment problem-solving assessment than families who received CMNF, although no corresponding decreases were seen in negative interactional behaviors. The positive effect of family treatment on patients' symptom trajectories over 1 year was partially mediated by increases in patients' positive nonverbal interactional behaviors during this same interval. 相似文献
970.
Aunola K Nurmi JE Onatsu-Arvilommi T Pulkkinen L 《Scandinavian journal of psychology》1999,40(4):307-317
In order to examine the extent to which parents' levels of education, financial resources, self-esteem, and their mastery-orientation versus task-avoidance are associated with their parenting styles and parental stress, data from two studies were analyzed. In Study I, parents of 105 6 to 7-year old children were asked to fill in scales measuring their parenting styles and parental stress, mastery-orientation, financial resources, and their level of education. In Study II, 235 parents were asked to fill in the same scales. An identical pattern of results was found in the two studies. Parents' self-esteem and their use of mastery-oriented strategy were found to be associated with authoritative parenting and low parental stress, whereas parents' low level of education was related to an authoritarian parenting style. The results further showed that the impact of parents' self-esteem on authoritative parenting and parental stress was partly mediated by their use of a mastery-oriented strategy. 相似文献