全文获取类型
收费全文 | 2538篇 |
免费 | 107篇 |
专业分类
2645篇 |
出版年
2023年 | 15篇 |
2022年 | 18篇 |
2021年 | 20篇 |
2020年 | 43篇 |
2019年 | 60篇 |
2018年 | 71篇 |
2017年 | 75篇 |
2016年 | 79篇 |
2015年 | 64篇 |
2014年 | 94篇 |
2013年 | 312篇 |
2012年 | 126篇 |
2011年 | 137篇 |
2010年 | 66篇 |
2009年 | 89篇 |
2008年 | 123篇 |
2007年 | 138篇 |
2006年 | 134篇 |
2005年 | 91篇 |
2004年 | 87篇 |
2003年 | 72篇 |
2002年 | 99篇 |
2001年 | 46篇 |
2000年 | 40篇 |
1999年 | 30篇 |
1998年 | 30篇 |
1997年 | 42篇 |
1996年 | 26篇 |
1995年 | 20篇 |
1994年 | 21篇 |
1993年 | 22篇 |
1992年 | 29篇 |
1991年 | 15篇 |
1990年 | 21篇 |
1989年 | 22篇 |
1988年 | 13篇 |
1986年 | 20篇 |
1985年 | 19篇 |
1984年 | 10篇 |
1983年 | 16篇 |
1982年 | 15篇 |
1981年 | 17篇 |
1980年 | 11篇 |
1978年 | 12篇 |
1977年 | 12篇 |
1976年 | 12篇 |
1975年 | 14篇 |
1974年 | 11篇 |
1973年 | 14篇 |
1971年 | 10篇 |
排序方式: 共有2645条查询结果,搜索用时 15 毫秒
81.
Male and female mice from the Collins HI and LO laterality strains were isolated for 3–5 days. Thereafter on Day 1 each was given the Intruder Test followed by a Training Test; the latter was repeated 1 week later. All males of 36 days or older fought vigorously, but without line differences. Females of the HI strain showed higher numbers of fighters and greater intensity of fighting than those of the LO strain, and by the second Training Test these differences were significant at p < 0.01. The HI and LO laterality strains thus provide useful tools for investigating the functions of female agonistic behavior and the possible relationship between laterality and the expression of aggression. 相似文献
82.
Data from experimental animals suggest that 5-hydroxytryptamine (5HT) may have an inhibitory effect on aggression, while clinical studies have found a correlation between pathological aggression and low brain 5HT. To investigate this relationship further we used amino acid mixtures designed to raise or lower the levels of the 5HT precursor, tryptophan. Normal male subjects were given tryptophan-depleted, balanced, or tryptophan-supplemented ammo acid mixtures and tested for aggression 5 hours later. The balanced amino acid mixture served as a control for the tryptophan depletion and supplementation. Testing for aggression was done using the Buss paradigm in which subjects deliver electric shocks to a (nonexistent) partner in response to stimulus tones. Duration and intensity of shock delivered were the measures of aggression, while responsivity to the stimulus tones was the measure of perceptual sensitivity. Neither tryptophan supplementation nor tryptophan depletion had any effect on these measures of aggression or perceptual sensitivity. We conclude that raising or lowering the synthesis of brain 5HT through alterations in tryptophan availability does not influence aggression in normal males as measured by the Buss task. 相似文献
83.
Heather Scott 《World Futures: Journal of General Evolution》2018,74(1):49-50
84.
85.
86.
Scott W. Henggeler Ph.D. Gary B. Melton Ph.D. Linda A. Smith B.A. Sonja K. Schoenwald M.A. Jerome H. Hanley Ph.D. 《Journal of child and family studies》1993,2(4):283-293
In a randomized clinical trial, multisystemic family preservation was shown to significantly reduce rates of criminal activity and incarceration in a sample of 84 serious juvenile offenders and their multi-need families. In the current study, archival records were searched for re-arrest an average of 2.4 years post-referral. Survival analysis showed that youths who received multisystemic family preservation were less likely to be re-arrested than were youths who had received usual services. Such results represent the first controlled demonstration that family preservation, when delivered via a clearly specified treatment model, has lasting effects with serious juvenile offenders. Implications for family preservation and juvenile justice research are discussed. 相似文献
87.
Anthony R. D'Augelli Scott L. Hershberger 《American journal of community psychology》1993,21(4):421-448
Studied 194 lesbian, gay, and bisexual youth aged 21 and younger who attended programs in 14 community centers to determine the personal challenges they face due to their sexual orientation and their responses to these stresses. First awareness of sexual orientation typically occurred at age 10, but disclosure to another person did not occur until about age 16. There was much variability in sexual behavior, and many youths reported both same-sex and opposite-sex sexual experiences. Although most had told at least one family member about their sexual orientation, there remained much concern about family reactions. Suicide attempts were acknowledged by 42% of the sample. Attempters significantly differed from nonattempters on several milestones of sexual orientation development, social aspects of sexual orientation, parents' knowledge of sexual orientation, and mental health problems.
The following organizations participated in this project and are thanked for their assistance: Affirmations (Detroit), the Atlanta Gay Center, Baltimore Gay and Lesbian Community Center, Boston Alliance of Gay and Lesbian Youth, Gay Alternative Youth (Pittsburgh), the Gay and Lesbian Youth Association of Dallas, Gay Youth Alliance — San Diego, the Gay and Lesbian Community Services Center of Los Angeles, Horizons Community Services (Chicago), the Indianapolis Youth Group, the Lesbian and Gay Community Services Center of Cleveland, Lavender Youth Recreation and Information Center (San Francisco), Outright (Denver), and Sexual Minority Youth Assistance League (Washington, DC). The following individuals associated with these groups are gratefully thanked for their help: Danny Barutta, Adriene Corbin, Tom Eversole, Chris Gonzalez, Bill Gripp, Rory Lopez, Phil Rector, Jamie Schield, Cheryl Schwartz, Jan Stephenson, Sterling Stowell, Amy Vitro, and Aubrey Wertheim. Gene Thomas is thanked for helping with data collection, as are Michael LaFlam, Patrick McNamara, and Mark Shiner, who processed the surveys. We also thank Rainer Silbereisen for his comments. This project was supported by funds from the Center for the Study of Child and Adolescent Development of the College of Health and Human Development at Pennsylvania State University. 相似文献
88.
Lori J. Stark Lenora G. Knapp Anne M. Bowen Scott W. Powers Elissa Jelalian Sylvia Evans Mary Anne Passero Mary M. Mulvihill Mel Hovell 《Journal of applied behavior analysis》1993,26(4):435-450
Three mildly malnourished children with cystic fibrosis and their parents participated in a behavioral group-treatment program that focused on promoting and maintaining increased calorie consumption. Treatment included nutritional education, gradually increasing calorie goals, contingency management, and relaxation training, and was evaluated in a multiple baseline design across four meals. Children's calorie intake increased across meals, and total calorie intake was 32% to 60% above baseline at posttreatment. Increased calorie consumption was maintained at the 96-week follow-up (2 years posttreatment). The children's growth rates in weight and height were greater during the 2 years following treatment than the year prior to treatment. Increases in pace of eating and calories consumed per minute were also observed 1 year posttreatment. These findings replicated and extended earlier research supporting the efficacy of behavioral intervention in the treatment of malnutrition in children with cystic fibrosis. 相似文献
89.
Scott Gelfand 《The Southern journal of philosophy》2019,57(4):483-504
Francis Hutcheson's moral sense theory is the inspiration for both act utilitarianism and a contemporary virtue ethics approach that Michael Slote calls agent‐based virtue ethics. In this essay, I look at other possibilities for ethical theory that spring from Hutcheson's writings and conclude that the landscape of sentimentalist inspired ethics is richer than many realize. I begin this article with a short explanation of Hutcheson's moral sense theory. I explain that Hutcheson proposes and embraces three distinct criteria of moral evaluation, one of which is concerned with the evaluation of motives and two of which are concerned with the evaluation of acts. Act utilitarianism adopts one of the criteria of act evaluation, and Slote's agent‐based virtue ethics adopts the remaining criterion of act evaluation and the criterion of motive evaluation. Then, after pointing out what I believe are shortcomings of Slote's agent‐based virtue ethics, I propose two Hutchesonian inspired theories, each of which is a compromise between act utilitarianism and agent‐based virtue ethics. The first, which I call hypothetical agent‐based virtue ethics, adopts two of Hutcheson's three criteria and is similar structurally to a virtue ethics theory articulated by Rosalind Hursthouse and Linda Zabzebski. The second, which, for lack of a better name, I call Hutchesonian hybridism, adopts all three of Hutcheson's criteria and is a hybrid combination of Slote's actualist agent‐based virtue ethics and hypothetical agent‐based virtue ethics. I argue that both hypothetical agent‐based virtue ethics and Hutchesonian hybridism overcome the shortcomings (pointed out earlier in this essay) of Slote's actualist agent‐based virtue ethics, and that both of these theories are, therefore, worthy of further consideration. 相似文献
90.
Patient-Informed Treatment Development of Behavioral Smoking Cessation for People With Schizophrenia
Sarah M. Wilson Alexandra C. Thompson Emily D. Currence Shaun P. Thomas Eric A. Dedert Angela C. Kirby Eric B. Elbogen Scott D. Moore Patrick S. Calhoun Jean C. Beckham 《Behavior Therapy》2019,50(2):395-409
The objective of this study was to use qualitative methodology to tailor and refine an existing smoking cessation intervention for the population of people who use cigarettes and are diagnosed with schizophrenia, schizoaffective, or psychotic disorder. Successive cohort design methodology was used to iteratively modify the treatment in response to qualitative participant, therapist, and consultant feedback on the intervention. Qualitative methodology for participant feedback included analysis of semistructured interviews with participants, visualization of app utilization data, and stakeholder feedback from study therapists and consultants. Using the successive cohort design, a tailored multicomponent mobile health smoking cessation intervention was developed. The intervention included mobile contingency management (i.e., financial compensation for confirmed abstinence from smoking), pharmacotherapy for smoking cessation, cognitive-behavioral counseling sessions, and the Stay Quit app for relapse prevention. Two cohorts (N = 13) were completed in the study; after each cohort, the treatment protocol was revised. The intervention is described, as well as the qualitative findings from each cohort and subsequent changes made to the intervention based upon patient and provider feedback. Metrics of patient engagement included treatment adherence (40% in Cohort 1 and 63% in Cohort 2). Both participants and therapists reported that the intervention was helpful. Over one third of participants self-reported abstinence at posttreatment. Since qualitative methodology is often underutilized in mental health treatment development, this study demonstrates the utility of the successive cohort design for treatment development of behavior change interventions for at-risk, vulnerable populations. 相似文献