全文获取类型
收费全文 | 5268篇 |
免费 | 53篇 |
专业分类
5321篇 |
出版年
2022年 | 32篇 |
2021年 | 30篇 |
2020年 | 68篇 |
2019年 | 86篇 |
2018年 | 119篇 |
2017年 | 119篇 |
2016年 | 131篇 |
2015年 | 111篇 |
2014年 | 116篇 |
2013年 | 543篇 |
2012年 | 237篇 |
2011年 | 218篇 |
2010年 | 164篇 |
2009年 | 145篇 |
2008年 | 204篇 |
2007年 | 240篇 |
2006年 | 185篇 |
2005年 | 158篇 |
2004年 | 159篇 |
2003年 | 172篇 |
2002年 | 193篇 |
2001年 | 111篇 |
2000年 | 87篇 |
1999年 | 102篇 |
1998年 | 84篇 |
1997年 | 74篇 |
1996年 | 82篇 |
1995年 | 52篇 |
1994年 | 59篇 |
1993年 | 57篇 |
1992年 | 80篇 |
1991年 | 61篇 |
1990年 | 62篇 |
1989年 | 55篇 |
1988年 | 47篇 |
1987年 | 46篇 |
1986年 | 50篇 |
1985年 | 50篇 |
1984年 | 65篇 |
1983年 | 50篇 |
1982年 | 59篇 |
1981年 | 54篇 |
1980年 | 49篇 |
1979年 | 41篇 |
1978年 | 34篇 |
1977年 | 41篇 |
1976年 | 42篇 |
1975年 | 28篇 |
1974年 | 32篇 |
1968年 | 26篇 |
排序方式: 共有5321条查询结果,搜索用时 15 毫秒
31.
Dr. Susan J. Blackmore Ph.D. 《Journal of Near-Death Studies》1993,11(4):205-217
An advertisement in an Indian newspaper solicited accounts from people who had come close to death. Of 19 received, 7 reported no experiences, 4 reported dreamlike experiences, and 8 reported near-death experiences (NDEs). These DNEs were comparable to those reported by Ray-mond Moody, and included tunnels, dark spaces, and bright lights, contrary to previous reports of Indian cases. Many respondents reported positive life changes regardless of whether or not they had an NDE. 相似文献
32.
Irwin Silverman Susan E. Dickens Marion Eals Judith Fine 《Infant and child development》1993,2(3):135-144
This study emanated from the long-standing question of whether a maternal bonding process similar to other mammalian species occurs in humans. The perceptions of adult adoptees and a matched sample of non-adoptees about their parents' behaviours towards them were compared on an original Parental Solicitude Scale. As hypothesized, birth children perceived their mothers as the more solicitous parent, but ratings of adoptive mothers showed a unilateral decline. Further, the differential ratings for birth and adoptive mothers occurred mostly for the factors labelled benignity vs abuse and tolerance vs control, rather than caretaking vs neglect, which was congruent to reported effects in prior studies of lack of mother-infant contact during the sensitive period for bonding. An alternative explanation of the data was also tested but not substantiated. 相似文献
33.
Freedman (1990) introduced a computer analog of the shuttlebox paradigm and presented results to show that this analog could be used for studying human avoidance conditioning. In the present study, a first experimental phase was conducted to test how the fact that the tone was considered aversive in the instructions and the intensity of this tone affect avoidance behavior. In a transfer-of-control test phase, it was tested as to whether the warning stimulus presented as a cue to the aversive stimulus had acquired either aversive or informative quality. An effect of instructions was observed for both levels of the auditive stimulus, and a stimulus effect was found for those groups that were given the instructions that described the tone as aversive. In the case of subjects who in the first phase achieved a certain learning criterion, it was recorded how often they in the second phase selected a condition in which the warning signal of the first phase was not presented. No transfer of control was observed. Thus, no positive evidence was found indicating that Freedman’s computer analog could be used for studying human avoidance conditioning. 相似文献
34.
In Experiment 1, haptically available object properties that would be diagnostic for constrained common object classification at the basic and subordinate levels were elicited in a questionnaire. The results are considered in terms of the nature of the haptically derived representations of common objects. Initial data are also presented regarding knowledge of the natural co-occurrence of properties in haptic object perception. In Experiment 2, the hand movements executed during haptic classification of manipulable common objects were examined. Manual exploration consisted of a two-stage sequence, an initial generalized "grasp-and -lift" routine, followed by a series of more specialized hand-movement patterns strongly driven by knowledge of the property diagnosticity for the specific object (obtained in Experiment 1). The current results may guide computational models of human haptic object classification and the development of perceptual systems for robots equipped with sensate dextrous hands, capable of intelligent exploration, recognition, and manipulation of concrete objects. 相似文献
35.
36.
This study is a systematic replication of the effects of insulin doses on operant behavior reinforced (in an earlier study) by fixed-ratio schedules of microwave (MW) reinforcement. In this study, insulin and dextrose doses were administered (ip) prior to fixed-interval 2-min. schedules of MW reinforcement in rats tested in a cold environment. Six Sprague-Dawley rats were conditioned to regulate their thermal environment with 5-sec. exposures of MW radiation (SAR = 0.34 Watts/kg/(mW/cm2) under the FI-2' schedules. Humulin-regular insulin and 50% solutions of dextrose were administered (ip) alternately with saline control sessions for 8-hr. durations. A within-subjects, repeated-measures 4 x 8 x 3 factorial analysis of variance design showed that insulin doses suppressed operant responding for heat, which confirmed the results of the earlier study under a different schedule. In addition, high doses of dextrose had similar suppressing effects on operant responding for heat. The data are interpreted in terms of the discriminative properties of increased thermogenesis produced by the insulin and dextrose doses. The suppressing effects were more pronounced for the first two hours, yet they persisted for approximately six hours of the 8-hr. sessions. 相似文献
37.
Research in marital therapy has been disadvantaged by the lack of a good, short and recent psychometric questionnaire to objectively assess the state of a marriage for research, demographic and clinical purposes. The Golombok Rust Inventory of Marital State (GRIMS) is a companion questionnaire to the Golombok Rust Inventory of Sexual Satisfaction (GRISS), and concentrates on aspects other than the sexual in a dyadic relationship between two adults living together. It is a 28 item psychometrically constructed inventory designed to produce a single scale along which changes in a marriage may develop as marital therapy progresses. It has been shown to be valid for this purpose, and to have a good reliability. 相似文献
38.
In their recent contribution to the Journal of Family Therapy , Frosh et al . apply discourse analytic methods to the study of 'process' in family therapy. While we welcome this contribution, we suggest that the authors' reading of the data has been affected by a number of fundamental presuppositions, which have led them to neglect the skilful rhetorical work taking place in the session. In this paper, we have undertaken an alternative analysis of the data, examining its rhetorical features and suspending judgement on the efficacy of the therapeutic project and on the truth status of statements made by participants in the session. While acknowledging that our microanalytic method has some shortcomings, we contend that attention to the situated and strategic nature of 'therapy talk' has exposed the primacy of notions of responsibility and blame in family work, and has shown how these issues are artfully negotiated by therapist and family in the cut and thrust of the therapeutic interview. 相似文献
39.
The Revd. Professor Leslie J. Francis The Revd. Susan H. Jones 《Pastoral Psychology》1997,45(6):421-428
A sample of 368 committed Christian adults completed the Index of Charismatic Experience together with the short form Revised
Eysenck Personality Questionnaire and the Myers Briggs Type Indicator (MBTI). The data demonstrate that, according to the
MBTI typology, Christians who prefer “thinking” are likely to score higher on the Index of Charismatic Experience than Christians
who prefer “feeling”. According to the Eysenckian dimensional model of personality, the charismatic experience is associated
with stable extraversion. 相似文献
40.
Recent memory theory has emphasized the concept ofneed probability—that is, the probability that a given piece of learned information will be tested at some point in the future. It has been proposed that, in real-world situations, need probability declines over time and that the memory-loss rate is calibrated to match the progressive reduction in need probability (J. R. Anderson & Schooler, 1991). The present experiments were designed to examine the influence of the slope of the need-probability curve on the slope of the retention curve. On each of several trials, subjects memorized a list of digits, then retained the digits in memory for 1, 2, 4, 8, or 16 sec. Some trials ended with a recall test; other trials ended with the message, “no test.” In Experiment 1, the likelihood of encountering a memory test (i.e., the need probability) was made to either increase or decrease as the retention interval increased; in Experiment 2, need probability either was flat (invariant across retention intervals) or decreased as the retention interval increased. The results indicated that the shape of the need-probability curve influenced the slope of the retention curve (Experiment 1) and that the effect became larger as the experimental session progressed (Experiment 2). The findings support the notion that memory adapts to need probabilities and that the rate of forgetting is influenced by the slope of the need-probability curve. In addition, all of the forgetting curves approximated a power function, suggesting that need probability influences the slope but not the form of forgetting. 相似文献