全文获取类型
收费全文 | 8403篇 |
免费 | 322篇 |
国内免费 | 1篇 |
出版年
2020年 | 103篇 |
2019年 | 141篇 |
2018年 | 157篇 |
2017年 | 193篇 |
2016年 | 216篇 |
2015年 | 158篇 |
2014年 | 203篇 |
2013年 | 914篇 |
2012年 | 326篇 |
2011年 | 319篇 |
2010年 | 234篇 |
2009年 | 214篇 |
2008年 | 311篇 |
2007年 | 294篇 |
2006年 | 280篇 |
2005年 | 253篇 |
2004年 | 264篇 |
2003年 | 243篇 |
2002年 | 293篇 |
2001年 | 105篇 |
2000年 | 102篇 |
1999年 | 128篇 |
1998年 | 138篇 |
1997年 | 124篇 |
1996年 | 111篇 |
1995年 | 132篇 |
1994年 | 109篇 |
1993年 | 103篇 |
1992年 | 107篇 |
1991年 | 100篇 |
1990年 | 90篇 |
1989年 | 82篇 |
1988年 | 66篇 |
1987年 | 66篇 |
1986年 | 69篇 |
1985年 | 85篇 |
1984年 | 106篇 |
1983年 | 119篇 |
1982年 | 115篇 |
1981年 | 144篇 |
1980年 | 104篇 |
1979年 | 121篇 |
1978年 | 125篇 |
1977年 | 117篇 |
1976年 | 102篇 |
1975年 | 103篇 |
1974年 | 105篇 |
1973年 | 66篇 |
1972年 | 63篇 |
1969年 | 56篇 |
排序方式: 共有8726条查询结果,搜索用时 15 毫秒
951.
Abstract Urinary incontinence is a common problem in psychiatric settings, particularly among psychogeriatric patients. In view of the known diuretic action of caffeine, the present study assessed the effect of tea and coffee consumption on level of incontinence in selected psychogeriatric inpatients. A total of 14 patients participated in the study which employed a combined “withdrawal” and “multiple-baseline across subjects” design to examine the effect of alternating phases of caffeine exposure and abstinence on frequency of daytime and nighttime incontinence. Incontinence levels were significantly reduced during periods of caffeine abstinence relative to periods of chronic caffeine exposure. The hypothesis that observed reductions in incontinence may have been due to accompanying reductions in fluid intake was examined but not supported. 相似文献
952.
Marie-France Marcoux James F. Sallis Thomas L. McKenzie Simon Marshall Colin A. Armstrong Kathleen J. Goggin 《Psychology & health》2013,28(4):659-677
Abstract SPARK is a controlled field study of a multi-component elementary school program to promote physical activity. One component is a weekly classroom-based self-management program, with the goal of increasing physical activity outside of school. The curriculum included goal setting, behavioral skills training, a reward system, and parent involvement. An evaluation of curriculum implementation and association between process and outcome was conducted using direct observation of lessons, subjective ratings by 24 teachers and 391 parents, and participation records of 549 students. Teachers viewed the self-management curriculum less positively than the physical education curriculum. Teachers were observed implementing an average of 65% of curriculum elements, which may have contributed to the limited effects of the self-management program. Student participation in the program, measured by points earned for doing out of school physical activity, was correlated significantly with changes in body mass index and multiple psychosocial variables among boys but not girls. Barriers to full program implementation were identified, and a remaining challenge is to improve self-management curriculum implementation by teachers. 相似文献
953.
Abstract The Views of Life Scale (VOLS) was designed to measure perception of well-being in three areas: inherent value of life, effective life management, and sense of health. Items were placed in these three categories by a team of advanced doctoral students; their overall agreement on item placement was 91.8%. These three categories became Subscales I, II and III of the total instrument. Seven hundred and thirty-two participants responded to the 42 item VOLS; subsamples of this group also took various other instruments with which the VOLS was being compared. Reliability assessment yielded very strong test-retest stability (I=0.80, II=0.87, III=0.76, Total=0.86) and high internal consistency (I=0.76, II=0.83, III=0.81, Total=0.91) for the VOLS measures. Relationships between the VOLS and other inventories provided consistent support for the convergent and divergent validity of the VOLS. An oblique rotation factor analysis produced five major quantitative clusters in the VOLS. There was considerable overlap between these factors and the original subscales. 相似文献
954.
Robert M. Kaplan PH.D J. Allen McCutchan M.D Ana M. Navarro PH.D. John P. Anderson PH.D. J. Hampton Atkinson M.D. James Chandler M.D. 《Psychology & health》2013,28(1-2):131-141
Abstract Background In survival analysis, those who are alive are statistically coded as 1.0 while those who are dead are coded as 0.0. Since everyone who remains alive is given the same score, a person confined to bed with an irreversible coma is alive and is counted the same as someone who is active and asymtomatic. The Quality of Well-being (QWB) scale defines levels of wellness on the continuum between death and optimum function and integrates morbidity and mortality into the same number. This paper demonstrates the effect of including mortality in QWB estimates for male adults with HIV infection. Method This study involves follow-up of a cohort of 386 male adults participating in the San Diego HIV Neurobehavioral Research Center (HNRC). Patients were evaluated using the QWB at enrollment and at six month intervals. All patients were classified into three stages of HIV disease according to the Center for Disease Control (CDC) classification: CDC IV (symptomatic HIV disease), CDC II or III (asymptomatic infection) and uninfected male controls. Results QWB scores were calculated with and without mortality included for men in each CDC class who completed a one year (N = 148) or two year follow-up (N = 60). At each evaluation, there were significant differences among CDC classes and inclusion of deaths increased the variance accounted for by CDC class at each evaluation. Conclusions HIV infection has significant impacts upon both morbidity and mortality. Survival analysis captures only the mortality dimension, while quality adjusted survival analysis using the QWB includes both dimensions. We propose quality adjusted survival analysis as a more sensitive method for assessing outcome in HIV disease and other health conditions. 相似文献
955.
Abstract Berry's (1997) framework for acculturation research was used to explore the relationship between identity and health among Irish immigrants in England. One hundred and twelve first generation Irish immigrants completed questionnaire measures of ethnic identity, opportunities for identity expression, generalised coping style, and health behaviour. Significant, though small, positive correlations were observed between identity and health behaviour as predicted. Regression analyses and path analysis were used to present a model of the link between variables. Of particular note were the contrasting ways in which the two dimensions of identity were associated with health behaviour. Participants who positively evaluated their ethnic origins reported engaging in healthier behaviour and adopting more beneficial coping strategies when faced with day-to-day stresses and problems. Participants who reported their ethnic origin as more central to their overall identity were also more likely to adopt beneficial coping strategies. Concomitantly, however, they had fewer than desired opportunities for expressing their ethnic identity which was, in turn, associated with less beneficial coping and health behaviour. In looking for ways to tackle the well-documented health problems of both first and second generation Irish in England, the results suggest that encouragement to feel more positive about their ethnic identity might result in greater usage of behavioural approach coping and, relatedly, to improved health behaviour. 相似文献
956.
Christi A. Patten Colin A. Armstorng John E. Martin James F. Sallis Jennifer Booth 《Psychology & health》2013,28(4):571-581
Abstract Building on our previous six study series, the current studies 7 and 8 evaluated behavioral methods of improving adherence to exercise in adults. The studies tested the effectiveness of a single exercise modality versus choice of a variety of exercises and were conducted as part of a 12-week extended studies college course in San Diego, CA. Recruitment efforts were targeted to individuals who reported that they were sedentary and/or had experienced difficulty adhering to regular exercise. Participants were 42 adults (32F, 10M; mean age = 42.0) in Study 7 and 48 adults (35F, 8M; mean age = 47.9) in Study 8. In each study, subjects were randomly assigned to a single focus or variety exercise condition. There were no significant group differences in class attendance or out-of-class exercise adherence rates in Studies 7 or 8. In Study 7, significantly lower drop-out rates were detected in the single focus group (19%) than the variety condition (47.6%) (p = 0.04). No significant group differences were detected for drop-out rates in Study 8. Suggestions for further research are offered. 相似文献
957.
958.
James Dilley Willi McFarland William Woods James Sabatino Tania Lihatsh Barbara Adler 《Psychology & health》2013,28(2):235-246
Men who had high-risk sex with men in the previous year ( N = 124) were asked to recall their thought processes at the time they last had unprotected anal sex with a man who was HIV-positive or of unknown serostatus. Self-justifications for non-condom use were examined individually and in internally validated scales. The most common single self-justification was I want to have unprotected sex because it feels good , endorsed by 76%. Other common thoughts included the notion that it is only human to slip up occasionally (59%) and the resolution to withdraw before ejaculation (59%). For scaled items, the most strongly endorsed themes were: (1) that condoms reduce sexual pleasure (any of 6 items endorsed at least slightly by 90%); (2) fatalism or leaving it to chance (11 items, 81%); and (3) loss of control (9 items, 77%). The thoughts and themes identified may be useful in planning individual and community prevention messages. 相似文献
959.
The self-concept is usually seen as individualistic and/or social-relational, although sometimes it is viewed as ecological, temporal, or biological, constituting differing perspectives that are not well unified. The construct of self-expansiveness, which shows how the self-concept can expand from a narrow individualistic identification to wider social, ecological, temporal, and biological identifications to very expansive transpersonal identifications, is discussed as an integrating framework for understanding the self-concept. Three validation studies using the Self-Expansiveness Level Form Transpersonal Scale (Friedman, 1981), a measure of transpersonal self-expansiveness, were conducted with a known transpersonal/spiritual sample and student samples, comparing it with various spirituality measures across samples. Generally, results support that scale's construct and criterion validity and, consequently, the validity of the underlying construct of self-expansiveness. 相似文献
960.
James R. Schmidt 《Acta psychologica》2013,142(1):119-126
The present work introduces a computational model, the Parallel Episodic Processing (PEP) model, which demonstrates that contingency learning achieved via simple storage and retrieval of episodic memories can explain the item-specific proportion congruency effect in the colour-word Stroop paradigm. The current work also presents a new experimental procedure to more directly dissociate contingency biases from conflict adaptation (i.e., proportion congruency). This was done with three different types of incongruent words that allow a comparison of: (a) high versus low contingency while keeping proportion congruency constant, and (b) high versus low proportion congruency while keeping contingency constant. Results demonstrated a significant contingency effect, but no effect of proportion congruence. It was further shown that the proportion congruency associated with the colour does not matter, either. Thus, the results quite directly demonstrate that ISPC effects are not due to conflict adaptation, but instead to contingency learning biases. 相似文献