全文获取类型
收费全文 | 45299篇 |
免费 | 1788篇 |
国内免费 | 24篇 |
出版年
2020年 | 459篇 |
2019年 | 573篇 |
2018年 | 806篇 |
2017年 | 832篇 |
2016年 | 833篇 |
2015年 | 625篇 |
2014年 | 719篇 |
2013年 | 3441篇 |
2012年 | 1303篇 |
2011年 | 1367篇 |
2010年 | 917篇 |
2009年 | 885篇 |
2008年 | 1240篇 |
2007年 | 1205篇 |
2006年 | 1096篇 |
2005年 | 969篇 |
2004年 | 888篇 |
2003年 | 878篇 |
2002年 | 871篇 |
2001年 | 1716篇 |
2000年 | 1692篇 |
1999年 | 1211篇 |
1998年 | 516篇 |
1997年 | 449篇 |
1996年 | 435篇 |
1995年 | 422篇 |
1992年 | 1002篇 |
1991年 | 975篇 |
1990年 | 959篇 |
1989年 | 853篇 |
1988年 | 826篇 |
1987年 | 825篇 |
1986年 | 774篇 |
1985年 | 827篇 |
1984年 | 683篇 |
1983年 | 545篇 |
1982年 | 432篇 |
1979年 | 652篇 |
1978年 | 495篇 |
1977年 | 452篇 |
1975年 | 576篇 |
1974年 | 618篇 |
1973年 | 680篇 |
1972年 | 543篇 |
1971年 | 483篇 |
1970年 | 435篇 |
1969年 | 477篇 |
1968年 | 574篇 |
1967年 | 497篇 |
1966年 | 518篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
The role of self-produced movement and visual tracking in infant spatial orientation 总被引:1,自引:0,他引:1
In two longitudinal studies, infants were trained at 12 and 18 months to find an object hidden in one of two identical wells in a Plexiglas box. On the test trial, normal access was blocked and infants were either guided by their mother or allowed to move on their own to another opening on the opposite side. In Experiment 1 significantly more correct responding occurred after active movement than after passive at 12 months, with correct responding related to high visual tracking. In contrast, at 18 months correct search without tracking predominated among both movement conditions. A difference between the conditions in the position of the mother on the test trial was ruled out as a contributor to performance on the basis of data from Experiment 2. When opaque sides were inserted to prevent tracking in Experiment 3, active movement no longer facilitated correct search at 12 months, thus indicating that the tracking and not the active movement per se was the critical factor. 相似文献
982.
In three experiments, the effect of additional "contextual" elements on the discrimination of the orientation of linear and curvilinear segments was investigated with 4-month-old infants. In Experiment 1, paired visual matrices (one which contained some irregularity in orientation of internal elements, vs one which contained no irregularities) were presented. Infants detected irregular matrices significantly better than chance, but such detection was not aided by contextual elements. Discrimination of orientation in Experiment 2 was assessed with a paired-comparison familiarization-novelty paradigm. It was found that the addition of elements here significantly aided discrimination of linear segment orientation, but not curvilinear segment orientation. Experiment 3 investigated why this effect was not found for curvilinear segments; after equating the curvilinear stimuli to linear ones used in Experiment 2 with respect to the closedness of figure, discrimination of curvilinear orientation was observed. 相似文献
983.
Politicians sometimes shift the stances that they take on issues. An experiment investigated the effect of such a shift upon observers' perceptions of and feelings about an ostensible candidate for public office. The target issue (private ownership of handguns) was chosen as being relatively emotional for some subjects and unemotional for others. Subjects were also selected (independently) as being either pro or con on the issue. The position taken by the stimulus person (who, in contrast to previous research, was identified as a candidate for office) was portrayed as initially being either similar or dissimilar to that of the subject. An assessment of the candidate's position 6 months later indicated either no change or a reversal of the initial position. Subjects' evaluations of the candidate on a variety of dimensions yielded a consistent pattern. The combination of initial agreement and final agreement was viewed more favorably than any other combination. Taken together, the data suggest two conclusions. First, there was no support in this context for the notion that a shift from disagreement to agreement would be especially valued (i.e., there was no “gain” effect). Second, in the realm of politics, people value consistent agreement with their own position—but they do not reward consistency per se. 相似文献
984.
985.
S. Graham Kosch Ph.D. Charles A. Reiner Ph.D. 《Journal of Contemporary Psychotherapy》1984,14(2):145-157
This project, utilizing a pretest and posttest design, studied interactions between co-therapists and the relationships of their interactions to client outcome. Six co-therapist pairs at a counseling center saw two clients in multiple treatments yielding twelve cases. The study investigated co-therapist relationships in regard to: (a) their level of mutuality or caring for their partners, (b) their ratings of the quality of their relationships, and (c) their agreement as to perceptions and behavior during sessions. Also investigated were: the relation of co-therapist interaction to client outcome and the personal growth of the therapists over the course of therapy. Results supported success claims of the literature concerning co-therapy. 相似文献
986.
987.
The purpose of the present study was to investigate the influence of race (black, white) on the MMPI performance of alcoholic and nonalcoholic inpatients. Subjects were 73 (27 black, 46 white) male alcoholic inpatients and 73 (27 black, 46 white) male nonalcoholic psychiatric inpatients. While black and white alcoholics failed to differ on the MMPI, white alcoholics presented as less disturbed and black alcoholics as less defensive and distressed, compared to their respective nonalcoholic counterparts. Furthermore, only white alcoholics were accurately identified by the MMPI 2-4/4-2 high-point pair combination and only white alcoholics achieved more high-point pairs containing Scale 4 relative to nonalcoholic controls. 相似文献
988.
A brief version of the Multiscore Depression Inventory was evaluated. Good coefficient alpha and test-retest reliabilities were obtained for the total score and the subscales. Two factor analyses were reported which appear to justify the use of a multiscore approach for at least 8 of the 9 subscales: helplessness, energy level, guilt, social introversion, cognitive difficulty, irritability, pessimism, and low self-esteem. Sad mood apparently overlapped with energy level on one analysis (replicating findings with the 118-item Multiscore Depression Inventory), and with self-esteem on the second analysis. Normative data are provided on diverse samples totaling 849 subjects. 相似文献
989.
The efficient assessment of need for cognition 总被引:35,自引:0,他引:35
A short form for assessing individual differences in need for cognition is described. 相似文献
990.
Self-perception processes have been postulated to occur only to the extent that initial attitudes are weak. The present research asked whether the outcome of such a process is a strengthening of the attitude in question. Two experiments investigated the accessibility of attitudes from memory following self-inference from behavior. Experiment 1 examined the consequence for attitude accessibility of reviewing and considering previously performed religious behaviors that were recent and primarily unmanded versus distant in time and "manded" in nature. Experiment 2 involved the performance of a new behavior that was either required or freely chosen. In each case, control subjects either did not review prior behaviors or did not perform a new behavior. In both experiments, attitude accessibility, as measured by the latency of response to attitudinal inquiries, was enhanced by the consideration or performance of unmanded behavior, but not by manded behavior. The relevance of this finding to issues regarding attitude-behavior consistency and attitudinal persistence is discussed. 相似文献