全文获取类型
收费全文 | 34374篇 |
免费 | 1137篇 |
国内免费 | 12篇 |
出版年
2019年 | 303篇 |
2018年 | 540篇 |
2017年 | 548篇 |
2016年 | 639篇 |
2015年 | 444篇 |
2014年 | 467篇 |
2013年 | 2311篇 |
2012年 | 1027篇 |
2011年 | 1071篇 |
2010年 | 571篇 |
2009年 | 530篇 |
2008年 | 782篇 |
2007年 | 712篇 |
2006年 | 703篇 |
2005年 | 1814篇 |
2004年 | 1180篇 |
2003年 | 980篇 |
2002年 | 710篇 |
2001年 | 840篇 |
2000年 | 826篇 |
1999年 | 660篇 |
1998年 | 307篇 |
1997年 | 317篇 |
1996年 | 316篇 |
1992年 | 608篇 |
1991年 | 584篇 |
1990年 | 588篇 |
1989年 | 536篇 |
1988年 | 534篇 |
1987年 | 520篇 |
1986年 | 569篇 |
1985年 | 538篇 |
1984年 | 474篇 |
1983年 | 414篇 |
1982年 | 295篇 |
1981年 | 315篇 |
1979年 | 523篇 |
1978年 | 380篇 |
1977年 | 330篇 |
1976年 | 352篇 |
1975年 | 432篇 |
1974年 | 548篇 |
1973年 | 571篇 |
1972年 | 437篇 |
1971年 | 458篇 |
1970年 | 411篇 |
1969年 | 450篇 |
1968年 | 516篇 |
1967年 | 490篇 |
1966年 | 478篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
942.
Dependency and brain damage in alcoholics 总被引:1,自引:0,他引:1
943.
944.
945.
Tenacious goal pursuit and flexible goal adjustment: explication and age-related analysis of assimilative and accommodative strategies of coping 总被引:6,自引:0,他引:6
Crises and critical life transitions activate 2 distinct but complementary modes of coping, (a) transforming developmental circumstances in accordance with personal preferences (assimilative tendency) and (b) adjusting personal preferences to situational constraints (accommodative tendency). Assimilative and accommodative tendencies were measured by a questionnaire comprising 2 independent scales (Tenacious Goal Pursuit and Flexible Goal Adjustment). Both scales predict high life satisfaction and low depression and are positively related to generalized internal control beliefs. The scales evinced an opposite relation to age: Cross-sectional analyses on a sample of 890 Ss in the age range from 34 to 63 years revealed a gradual shift from an assimilative to an accommodative mode of coping. Implications for theories of depression and successful aging are discussed. 相似文献
946.
Previous training studies of fluid intellectual abilities have involved training on either figural relations or induction tasks. In the present study, young, middle-aged, and elderly adults were given training on another measure of fluid ability--Raven's Progressive Matrices. The training involved a strategy-modeling technique that lasted no more than a few minutes. The results indicated that (a) performance on the Raven decreased with increasing age, (b) training significantly improved performance, and (c) the effect of training did not differ as a function of the age or sex of the subjects. Thus, the results indicate that performance on the Raven can be significantly improved in a single, brief training session. 相似文献
947.
A study is reported in which the relations among normal aging, source amnesia, and frontal lobe functioning were explored. Twenty-four older adults (aged 60-84 years) were tested on their ability to remember where they had acquired new factual information; they were also given the Wisconsin Card Sorting Test (WCST), a test of verbal fluency, and other psychometric tests. The degree of source amnesia in this normal sample correlated with age, verbal fluency, and some measures from the WCST. Source amnesia was not related to Performance IQ, however, or to a measure of fact recall. The implications for the relations among aging, memory, and frontal lobe functions are discussed. 相似文献
948.
Two hundred twelve bereaved elders rated marital adjustment using items drawn from the Locke and Wallace (1959) Marital Adjustment Test and completed the Beck Depression Inventory 2 months, 12 months, and 30 months after the loss of their spouses. Their responses were compared with those of 162 nonbereaved individuals of comparable age who were tested at the same times. More positive ratings of marital adjustment were made by bereaved subjects than by nonbereaved subjects. Among nonbereaved elders, more severe ratings of depression were associated with lower ratings of marital adjustment. In the bereaved sample, however, the opposite was found: More severe ratings of depression were associated with higher ratings of marital adjustment. This pattern of results changed only slightly over the 2.5-year course of bereavement and was not influenced by gender. These results are discussed in terms of cognitive processes (e.g., idealization) that influence retrospective assessments of marital adjustment during bereavement. 相似文献
949.
Systematic 24-hr behavioral observations of sleep and wakefulness in a skilled-care nursing facility
Sleep patterns of aged, infirm, demented, chronically institutionalized residents of a skilled-care nursing facility were studied. The purpose of this naturalistic study was to describe sleep and wakefulness (S/W) within the limits afforded by brief behavioral observations and to examine homeostasis and diurnal rhythmicity of S/W as a function of psychoactive drug intake. Observers noted S/W every 15 min, 24 hr a day for 10 days in 24 Ss. Results indicated substantial individual variation in daytime hours. Daily and weekly variation within Ss was minimal. Sleep was least likely near sunset. Ss on psychoactive drugs showed dampened diurnal variation in S/W rhythms. In Ss not on such drugs, there was a suggestion of homeostasis of S/W between sleep during the morning and evening hours. Results are discussed methodologically (viability of approach), theoretically (age-related change in sleep), and practically (potential treatments). 相似文献
950.
V G Cicirelli 《Psychology and aging》1990,5(3):458-466
Paternalism in family caregiving may jeopardize the older persons' autonomy; it needs to be better understood. Study objectives were to determine the relationship of belief in paternalism to personal-social characteristics and to determine the relative importance of these variables as predictors of belief in paternalism. Forty-six pairs of daughters (age 49.7) and mothers (age 77.7) were measured on belief in paternalism, dogmatism, attitude toward elders, affective feelings toward the other, and background and caregiving variables. Among both mothers and daughters, dogmatism and attitude toward elders were related to belief in paternalism; daughters' affective feelings was also related. Caregiving variables were unrelated, and demographic background was important only for daughters. Attitude toward elders was the strongest predictor. Results were interpreted in terms of a traditional family ideology. 相似文献