全文获取类型
收费全文 | 26763篇 |
免费 | 1180篇 |
国内免费 | 13篇 |
专业分类
27956篇 |
出版年
2020年 | 361篇 |
2019年 | 397篇 |
2018年 | 608篇 |
2017年 | 565篇 |
2016年 | 577篇 |
2015年 | 413篇 |
2014年 | 524篇 |
2013年 | 2089篇 |
2012年 | 904篇 |
2011年 | 973篇 |
2010年 | 543篇 |
2009年 | 631篇 |
2008年 | 838篇 |
2007年 | 830篇 |
2006年 | 748篇 |
2005年 | 648篇 |
2004年 | 620篇 |
2003年 | 614篇 |
2002年 | 550篇 |
2001年 | 865篇 |
2000年 | 849篇 |
1999年 | 635篇 |
1998年 | 294篇 |
1997年 | 269篇 |
1996年 | 250篇 |
1995年 | 232篇 |
1992年 | 526篇 |
1991年 | 462篇 |
1990年 | 526篇 |
1989年 | 429篇 |
1988年 | 411篇 |
1987年 | 395篇 |
1986年 | 411篇 |
1985年 | 481篇 |
1984年 | 377篇 |
1983年 | 300篇 |
1982年 | 259篇 |
1979年 | 357篇 |
1978年 | 291篇 |
1977年 | 241篇 |
1976年 | 231篇 |
1975年 | 325篇 |
1974年 | 366篇 |
1973年 | 378篇 |
1972年 | 293篇 |
1971年 | 260篇 |
1969年 | 235篇 |
1968年 | 293篇 |
1967年 | 258篇 |
1966年 | 276篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
961.
N.H Azrin R.A Philip P Thienes-Hontos V.A Besalel 《Journal of Vocational Behavior》1980,16(2):133-145
About 1000 WIN welfare clients were selected in five cities: Harlem, New Brunswick, Milwaukee, Wichita, and Tacoma, and half were randomly assigned to the Job Club program. Of the continuing clients, 87% of the Job Club sample obtained jobs vs 59% of the Control sample at the 12-month follow-up and 80 vs 48% at 6 months. The Job Club was more effective in each of the five cities, for men and women, for high school graduates or dropouts, for blacks, whites, and Spanish, for handicapped or nonhandicapped, veterans or nonveterans, the young and the older, and for those required to participate as well as those who volunteered. The jobs obtained by the Job Club clients were comparable to the Control clients' jobs in terms of mean salary, full-time status, and type of job, and were more likely to be enduring, nonsubsidized, and obtained by the job-seeker's own efforts. Job Club members obtained employment in a median of six sessions (mean of 11); 90% obtained jobs within 23 sessions. Follow-up questionnaire data indicated comparable job retention in the two samples but slightly greater advancement and job satisfaction for the Job Club clients. The method appears to assure employment to virtually all participating welfare clients. 相似文献
962.
Data from 4035 participants in Project TALENT were analyzed to examine the extent to which known sex differences in achievement held up when early potential for achievement was contolled. Original TALENT data, consisting of information on socioeconomic background, cognitive abilities, and educational and occupational aspirations, were collected in 1960 when members of the study sample were in Grade 9. Follow-up surveys measuring participants' educational and occupational attainment were conducted at 1, 5, and 11 years after the date of participants' expected graduation from high school. Women had higher high school grades and scored higher on a composite of academic ability tests taken in Grade 9 than did men. However, by 11 years after high school, men had acquired more education and were earning more money on the job. Sex differences in realization of achievement potential were found across all socioeconomic levels. At least part of the reason behind women's relative failure to translate potential into achievement may lie in the greater conflict, for women, between the roles of spouse/parent and the roles of student/worker: variables measuring the onset, duration, and extent of family-related commitments were more strongly related to female than to male realization of potential. Sex differences in achievement grew larger between the 5- and 11-year follow-ups as a greater proportion of women in the study sample became wives and mothers. The widening of the sex gap in achievement during this period was particularly pronounced among the subgroup of individuals who were in the top quartile of potential in Grade 9. 相似文献
963.
964.
Stages of career development consistent with age were found in a group of employed managers and professionals. They tended to attribute career success to inherent abilities, education, and developmental experiences in the company studied. Trends among three age groups were similar in regard to factors they perceived as enhancing or adversely affecting their career development. 相似文献
965.
966.
A cross-cultural examination of the attributions for the life satisfactions of the elderly was conducted by using a sample of 80 Asian-Indian and 80 United States retired citizens. It was hypothesized that factors of hard work, luck, family ties, religious faith, travel and recreation, personal abilities, money, social status, service to others and friendships would account for differences in the attributions for life-satisfactions of the two cultural groups. Results showed that more Asian than United States subjects reported satisfaction with life. Consistent with predictions, the attributions of the Asian group showed religious faith, service to others, family ties and luck as being very important factors contributing to life satisfaction. By contrast, more United States subjects reported that hard work, personal abilities, travel and recreation, and social status had significantly influenced their life satisfactions. Findings were interpreted in terms of cultural and socio-psychological variables which influence the attributions for life satisfactions. 相似文献
967.
Results of 1,579 observations of cars entering or exiting campus parking lots showed direct relationships between seat belt wearing and the intrusiveness of the engineering device designed to induce belt usage, and between device intrusiveness and system defeat. For example, all drivers with working interlocks or unlimited buzzer reminders were wearing a seat belt; but 62% of the systems with interlocks or unlimited buzzers had been defeated, and only 15.9% of the drivers in these cars were wearing a seat belt. The normative data indicated marked ineffectiveness of the negative reinforcement contingencies implied by current seat belt inducement systems; but suggested that unlimited buzzer systems would be the optimal system currently available if contingencies were developed to discourage the disconnection and circumvention of such systems. Positive reinforcement strategies are discussed that would be quite feasible for large-scale promotion of seat belt usage. 相似文献
968.
Arnold D Well Elizabeth Pugzles Lorch Daniel R Anderson 《Journal of experimental child psychology》1980,30(1):109-124
Since baseline performance varies with age, diminished interference effects found with increasing age do not provide evidence for a developmental trend in distractibility unless their relationship to baseline performance is known. In the present study, baseline difficulty was varied in two speeded classification experiments to investigate whether interference effects due to irrelevant information could best be characterized by absolute or proportional decrement models. In Experiment 1, first graders, third graders, and adults sorted cards on the basis of square size, both in the presence and absence of extraneous stimulus information. In Experiment 2, first graders and adults sorted cards on the basis of the density of a regular array of dots and two kinds of irrelevant information were used. Robust interference effects were found which declined with age. Manipulating discriminability of the relevant stimulus dimension resulted in large changes in sorting time, but interference effects did not vary with baseline difficulty. These results were interpreted as strongly supporting both an absolute decrement model and a developmental trend in distractibility. 相似文献
969.
Within the context of a prospective longitudinal research design, the structure of personality and initial levels of drug use were used to predict, multivariately, later drug use among male and female adolescents. The findings indicated that personality and belief measures of nonconventionality provide a significant increment in the prediction of later drug use beyond a level achieved by knowing initial usage rates. In addition, other personality and belief measures yield further increments in the prediction of subsequent drug use. Developmentally, the results revealed a differentiation of drug use patterns across the year's time, with one pattern primarily reflecting alcohol use, and a second pattern primarily reflecting use of marijuana and ‘hard’ drugs. While both patterns were related to measures of nonconventionality, certain personality features distinguished between them. Emergent use of marijuana and ‘hard’ drugs was related to depression, mistrust and attractiveness, while emergent alcohol use was related to generosity, ambition, agility and cheerfulness. These results were cross-validated in two samples of subjects. Implications of the findings for adolescent psychosocial development are discussed. 相似文献
970.
Left-handers with an inverted handwriting posture have been found by Levy and Reid to have relatively bilateral representation of tachistoscopically tested verbal and spatial functions. On the assumption that such bilateral representation is inefficient, it was hypothesized that left-inverted subjects (N = 20) would score lower than left- and right-handers with normal handwriting postures (Ns = 64, 66 respectively) on spatial reasoning. Results were consistent with the hypothesis. Possible alternative explanations and directions for future research are outlined. 相似文献