全文获取类型
收费全文 | 38635篇 |
免费 | 1524篇 |
国内免费 | 15篇 |
专业分类
40174篇 |
出版年
2019年 | 387篇 |
2018年 | 575篇 |
2017年 | 575篇 |
2016年 | 622篇 |
2015年 | 463篇 |
2014年 | 583篇 |
2013年 | 2765篇 |
2012年 | 1038篇 |
2011年 | 1023篇 |
2010年 | 711篇 |
2009年 | 656篇 |
2008年 | 974篇 |
2007年 | 946篇 |
2006年 | 866篇 |
2005年 | 788篇 |
2004年 | 746篇 |
2003年 | 710篇 |
2002年 | 751篇 |
2001年 | 1233篇 |
2000年 | 1225篇 |
1999年 | 918篇 |
1998年 | 412篇 |
1997年 | 423篇 |
1996年 | 415篇 |
1992年 | 801篇 |
1991年 | 753篇 |
1990年 | 747篇 |
1989年 | 679篇 |
1988年 | 683篇 |
1987年 | 652篇 |
1986年 | 675篇 |
1985年 | 660篇 |
1984年 | 592篇 |
1983年 | 517篇 |
1982年 | 391篇 |
1981年 | 386篇 |
1979年 | 595篇 |
1978年 | 481篇 |
1977年 | 411篇 |
1976年 | 410篇 |
1975年 | 515篇 |
1974年 | 632篇 |
1973年 | 664篇 |
1972年 | 498篇 |
1971年 | 516篇 |
1970年 | 463篇 |
1969年 | 520篇 |
1968年 | 622篇 |
1967年 | 570篇 |
1966年 | 554篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
As part of a large survey of addictive behavior in high school students, 43% of a sample of 278 (26% of the males, 57% of the females) scored above the cutoff point set by Overeaters Anonymous on their scale for assessing compulsive overeating. While this at-risk group did not report poorer general adjustment, health, or school achievement than did the students not at risk, they did significantly more often perceive their life quality and relationship with the person closest to them as less positive. The at-risk subsample indicated the defensive effectiveness of overeating in their significantly more frequent report of dissociative experiences while eating, and less severe ratings of insecurity, worrying, and daydreaming. One of the most salient findings was the at-risk students' more frequent report of addictive problems in their parents (overeating, alcohol and drug use, and gambling). 相似文献
82.
Recidivism data derived from various sources over a follow-up period of 1–11 yr, provided the basis for appraising the effectiveness of a comprehensive cognitive-behavioral treatment program for familial and nonfamilial child molesters. Unofficial records held by police and Children's Aid Societies proved to be the best data for estimating recidivism. These data revealed increases in recidivism with longer follow-up periods, but there were consistent advantages for the treated over the untreated patients. Men who had sexually abused the daughters of other people demonstrated the clearest treatment benefits. The younger offenders and those who had engaged in genital-genital contact with their victims were more likely to reoffend even if they were treated. Contrary to the expectations of behavior therapists, indices of deviant sexual preferences did not predict outcome. 相似文献
83.
Performances of noncollege student young adults, middle-aged adults, and elderly adults were contrasted on word temporal memory and paired-associate learning tasks. A comparison group of college-student subjects was also evaluated on each task. Significant effects for age variation were found for each task. The age sensitivity for temporal memory conflicts with one of the criteria commonly established for determining the automaticity of a memory task. In addition, moderately high positive correlations were found for each age group between word temporal memory scores and paired-associate learning scores, implying the involvement of effortful processes over the adult lifespan in word temporal memory. 相似文献
84.
85.
86.
87.
The relationship between primary process thinking and two measures of anxiety was investigated in fourth- and fifth-grade children. Holt's Scoring System for Primary Process Responses on the Rorschach was the measure of primary process thinking. The major hypotheses were supported for boys in that frequency of expression of primary process material was positively related to behavioral manifestations of anxiety as measured by the Teacher's Rating Scale. Also, controlled access to and integration of primary process was negatively related to teacher's ratings of anxiety. There were no significant results for girls. Primary process measures were not related to the State-Trait Anxiety Inventory for Children. Possible reasons for the different relationships between the primary process measures and the anxiety measures are discussed. 相似文献
88.
In three experiments we examined depressed individuals' mental control abilities and strategies. Experiment 1 revealed that although depressed college students were initially successful in suppressing negative material, they eventually experienced a resurgence of unwanted negative thoughts. Analysis of subjects' stream-of-consciousness reports indicated that this resurgence was associated with the use of negative thoughts as distracters from the unwanted item. In Experiment 2 depressed subjects acknowledged that positive distracters were more effective than negative ones in suppressing negative thoughts. This acknowledgement suggests that depressed subjects in Experiment 1 did not deliberately focus on negative distracters but that those thoughts automatically occurred because they were highly accessible. Experiment 3 demonstrated that depressed subjects' use of positive distracters could be increased somewhat when we provided such distracters and made them easily accessible. Taken together, the findings suggest that depression involves an enhanced accessibility of interconnected negative thoughts that can undermine mental control efforts. 相似文献
89.
90.
An experiment was conducted to examine the effects of medical diagnostic-test results on illness appraisal and the recall of symptoms and behavior. Subjects were tested for a fictitious enzyme deficiency and were told either that the test result was positive (deficiency present) or that it was negative (deficiency absent). In addition, some of the subjects were told the test was accurate 95% of the time and others were told it was accurate 75% of the time. As predicted, subjects judged the enzyme deficiency as less serious and more prevalent when presented with positive test results. Subjects with positive test results also recalled more behaviors that had been labeled as risk factors. Although positive test subjects tended to report more deficiency-related symptoms, diagnosis did not affect the free recall of general symptoms. In addition, information concerning the reliability of the diagnostic test had no effect on judgments or recall but did affect information seeking. Subjects with positive test results were less likely to request a definitive follow-up test when their results were unreliable. The results are interpreted as evidence for independent confirmatory search and denial processes following medical diagnosis. 相似文献