全文获取类型
收费全文 | 26368篇 |
免费 | 939篇 |
国内免费 | 487篇 |
出版年
2018年 | 341篇 |
2017年 | 364篇 |
2016年 | 381篇 |
2014年 | 356篇 |
2013年 | 1931篇 |
2012年 | 607篇 |
2011年 | 684篇 |
2010年 | 464篇 |
2009年 | 428篇 |
2008年 | 824篇 |
2007年 | 602篇 |
2006年 | 570篇 |
2005年 | 606篇 |
2004年 | 602篇 |
2003年 | 509篇 |
2002年 | 511篇 |
2001年 | 677篇 |
2000年 | 662篇 |
1999年 | 540篇 |
1998年 | 287篇 |
1997年 | 293篇 |
1996年 | 287篇 |
1995年 | 273篇 |
1992年 | 559篇 |
1991年 | 510篇 |
1990年 | 498篇 |
1989年 | 473篇 |
1988年 | 483篇 |
1987年 | 460篇 |
1986年 | 495篇 |
1985年 | 438篇 |
1984年 | 430篇 |
1983年 | 356篇 |
1982年 | 303篇 |
1981年 | 291篇 |
1980年 | 277篇 |
1979年 | 431篇 |
1978年 | 334篇 |
1977年 | 294篇 |
1976年 | 302篇 |
1975年 | 357篇 |
1974年 | 448篇 |
1973年 | 480篇 |
1972年 | 356篇 |
1971年 | 385篇 |
1970年 | 348篇 |
1969年 | 375篇 |
1968年 | 443篇 |
1967年 | 404篇 |
1966年 | 420篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
201.
W Fals-Stewart 《Perceptual and motor skills》1992,75(1):244-246
The subtests of the Brain Age Quotient, a brief neuropsychological battery, were used to screen for cognitive impairment in a sample of 112 substance abusers. Each of the subtests was scored, using newly developed T scores corrected for age, education, and gender, for which a mean battery score of T less than 40 indicates general cognitive impairment. The chance-corrected agreement in finding cognitive dysfunction between this battery and the Average Impairment Rating T score from the Halstead-Reitan battery was adequate, kappa = .81. This result suggests that, for discerning global cognitive impairment, this relatively brief neurodiagnostic screening device may be an attractive alternative to the more time-consuming Halstead-Reitan battery. 相似文献
202.
The Profile of Mood States was printed on four different colors of paper (yellow, red, green, blue) and white to test whether the color of paper would influence mood state scores of 246 college students. Univariate analyses of variance identified color effects only on the Fatigue scale. 相似文献
203.
This empirical study was undertaken to clarify controversial points emanating from previous theoretical and empirical papers dealing with apparently negative consequences on the personality development of young people who have at least a causal working-acquaintance with computers. We tested 174 persons of both sexes (age: 14-18 years) with a "Computer-Attitude-Questionnaire" and the "Mehrdimensionaler Pers?nlichkeitstest für Jugendliche" (Schmidt, 1981; "Multidimensional-Personality-Test"). A subgroup of 63 persons who have access to and do avail themselves of computers on a regular basis (as leisure-time activity) also answered the "Computer-Motive-Questionnaire". Statistical analyses revealed that the personality test-values of young people with a positive attitude toward computers range within the test-norm. The data for these people describe them as stress resistant, emotionally stable, well-balanced, sociable, achievement-oriented, and less aggressive. 相似文献
204.
B P McCloskey R L Klatzky J W Pellegrino 《Journal of experimental psychology. Human perception and performance》1992,18(4):948-961
Previous research (Klatzky et al., 1989) shows that the time required to make sensible/nonsensible judgments about an action-object phrase (e.g., "rub your stomach") is reliably faster when the phrase is preceded by a cure representing a specific prototypical hand shape (vs. a neutral cue). The current experiments investigated the effects of preparing for an alternate task (finger tapping vs. syllable vocalization) on facilitatory priming of sensibility judgments. Preparation for finger tapping reduced the magnitude of the priming effect more than preparation for vocalization, suggesting that resources accessed during semantic processing of action-object phrases are also used during manual response preparation. The results support the existence of a system representing manual actions that is limited in the number of activities that can be represented at one time and that is not so general that it represents manual and vocal tract movements. 相似文献
205.
L Matin W X Li 《Journal of experimental psychology. Human perception and performance》1992,18(1):257-289
The physical elevation corresponding to visually perceived eye level (VPEL) changes linearly with the pitch of a visual field. Deviations from true eye level average more than 0.5 times the angle of pitch over a 65 degrees pitch range. A visual field consisting of 2 dim, isolated vertical lines in darkness is more than 4/5 as effective as that of a complexly structured visual field; 2 horizontal lines have a small and inconsistent effect. Differences in influence on VPEL between pitched-from-vertical and horizontal lines were predicted from an analysis that extracted differences in retinal perspective resulting from changes in pitch. The Great Circle Model (GCM), based on a spherical approximation to the erect, stationary eye, predicts the present results and results of 8 other sets of experiments. The model treats the influence of a single line on VPEL as systematically related to the elevation of the intersection between the great circle containing the image of the line and the central vertical retinal meridian; generalized GCM combines visual inputs with inputs from the body-referenced mechanism and maps onto the central nervous system. 相似文献
206.
David A. Julian Teresa W. Julian Barry J. Mastrine Pauline Wessa Elizabeth Atkinson 《American journal of community psychology》1992,20(6):799-809
Analyzed case records to determine the costs and service usage patterns for a group of 25 youth randomly selected from the case load of a regional mental health agency. Study participants had extensive histories of publicly supported psychiatric hospitalizations. An average of 36.2 contacts per youth (905 total contacts) with human services providers were documented. Approximately 2 out of every 5 contacts resulted in out-of-home placements. The estimated cost of providing services to the 25 youth exceeded 3 million dollars. The types and costs of treatment services provided to study participants are discussed. 相似文献
207.
Arthur J. Reynolds Roger P. Weissberg Wesley J. Kasprow 《American journal of community psychology》1992,20(5):599-624
Investigated predictors of five measures of early school adjustment for an ethnically diverse cohort of 683 inner-city kindergartners and first graders. Data from 2 consecutive years were collected from teachers, school records, and children. A multiple-regression preduction model significantly explained children's competence behavior, problem behavior, reading achievement, mathematics achievement, and school absences. Prior adjustment and sociodemographic factors explained a majority of the variance in adjustment. Perceived quality of parent involvement was signifcantly related (in the expected direction) to all five outcomes. Exposure to life events was significantly associated in the expected direction with competence behavior, problem behavior, and school absences but not with reading and mathematics achievement. Together, parent involvement and life-event variables explained as much as 12% of the variance in adjustment independent of sociodemographic and prior adjustment factors. The role of family and school factors in the adjustment of children at risk is discussed [corrected]. 相似文献
208.
Arthur D. Anastopoulos David C. Guevremont Terri L. Shelton George J. DuPaul 《Journal of abnormal child psychology》1992,20(5):503-520
Prior research has shown that parenting stress levels can be quite high among families of children with attention deficit hyperactivity disorder (ADHD). This study investigated the degree to which such stress was related not only to the child's ADHD, but also to various other child, parent, and family-environment circumstances. Multimethod assessments were conducted on 104 clinic-referred children with ADHD. Data collected from these subjects were entered into hierarchical multiple-regression analyses, utilizing the Parenting Stress Index as the criterion. The results showed that child and parent characteristics accounted for a substantial portion of the variance in overall parenting stress. The child's oppositional-defiant behavior and maternal psychopathology were especially potent predictors. The severity of the child's ADHD, the child's health status, and maternal health status also emerged as significant predictors. These findings are discussed in terms of their impact upon the clinical management of children with ADHD.The authors are grateful to Mary Maher and Paula Nevins for their assistance in collecting and coding the data. The authors would also like to thank Dr. Kenneth Fletcher for his helpful comments regarding the statistical analyses. 相似文献
209.
A short-term longitudinal study was conducted to determine whether self-regulation at 4 years could be predicted from child and maternal measures obtained when the children were age 24 months. The subjects were 69 children and their mothers drawn from the general community. Criterion behaviors assessed at 4 years were those suggestive of attention-deficit hyperactivity disorder. Of the 24-month child measures, maternal ratings of the child's impulsivity and attention span, plus an objective measure of delay ability, were the most effective predictors. Maternal negativity, as assessed in mother-child interaction, predicted the criterion behaviors, even after the child's behavior as an elicitor of maternal behavior was controlled. Maternal child-rearing attitudes on the dimensions of warmth and aggravation were also effective predictors, even after controlling for the child's emotionality as a possible determinant of maternal attitudes. It is argued that the results with the maternal attitude measures provide support for the hypothesis that maternal behavior is a contributor to the development of self-regulation.This research was supported by a State of Ohio Academic Challenge Grant to the Bowling Green State University Clinical Psychology Program, and by a Basic Grant awarded to the first author by the Bowling Green State University Faculty Research Committee. The authors are grateful to Eric Dubow, Douglas Ullman, and two anonymous reviewers for their helpful comments and criticisms on previous versions of this article. 相似文献
210.