全文获取类型
收费全文 | 155篇 |
免费 | 4篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 3篇 |
2017年 | 4篇 |
2016年 | 6篇 |
2014年 | 4篇 |
2013年 | 11篇 |
2012年 | 9篇 |
2011年 | 10篇 |
2010年 | 2篇 |
2009年 | 6篇 |
2008年 | 4篇 |
2007年 | 6篇 |
2006年 | 8篇 |
2005年 | 8篇 |
2004年 | 4篇 |
2003年 | 9篇 |
2002年 | 5篇 |
2001年 | 6篇 |
2000年 | 6篇 |
1999年 | 4篇 |
1995年 | 5篇 |
1994年 | 2篇 |
1993年 | 5篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 4篇 |
1986年 | 3篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1977年 | 2篇 |
1974年 | 2篇 |
1973年 | 1篇 |
1967年 | 1篇 |
排序方式: 共有159条查询结果,搜索用时 15 毫秒
131.
Frances F. Worchel Jan N. Hughes Becky M. Hall Shari B. Stanton Harrison Stanton Vija Z. Little 《Journal of abnormal child psychology》1990,18(3):271-282
This study reports on several classification issues utilizing the Children's Depression Inventory (CDI), the Child Behavior Checklist-Teacher Form (CBCL-T), and the Peer Nomination Inventory of Depression (PNID). The first sample contained 752 public school children in grades 5, 6, and 9. A second sample of 142 fifth-graders was included to have an additional PNID comparison group. Results revealed moderate correlations between the CDI and the CBCL-T and PNID. Use of multiple criteria for selecting children as depressed was discussed, and selection rates using multiple measures with either strict or lenient cutoff scores were given. Normative data on the PNID were evaluated, and it was suggested that norms for the PNID may not be generalizable to other samples. Finally, race and gender analyses showed that CDI scores for females were significantly higher than for males, whereas CDI scores for Hispanics were significantly higher than for non-Hispanic whites. However, Omega-squared analyses for these two variables showed this to be of little practical significance. 相似文献
132.
The present study examined a longitudinal model of state and trait negative affect as predictors of job-search success. Job-search self-efficacy and job-search intensity were also examined as mediators of the negative affect—job-search success relation. Overall the model offered mixed support for Kasl’s (1982) Reverse Causation Hypothesis. Results suggested that trait negative affectivity had a direct negative relationship with subsequent job-search success (i.e., number of offers and job status). Results also suggested that trait negative affectivity related indirectly to interview success through job-search self-efficacy and job search intensity. Contrary to the Reverse Causation Hypothesis, positive relationships were found between distress (state negative affect) and job search outcomes. 相似文献
133.
134.
135.
Bailey CP Nicholls RE Zhang XL Zhou ZY Müller W Kandel ER Stanton PK 《Learning & memory (Cold Spring Harbor, N.Y.)》2008,15(4):261-270
Cyclic AMP signaling plays a central role in regulating activity at a number of synapses in the brain. We showed previously that pairing activation of receptors that inhibit adenylate cyclase (AC) and reduce the concentration of cyclic AMP, with elevation of the concentration of cyclic GMP is sufficient to elicit a presynaptically expressed form of LTD at Schaffer collateral-CA1 synapses in the hippocampus. To directly test the role of AC inhibition and G-protein signaling in LTD at these synapses, we utilized transgenic mice that express a mutant, constitutively active inhibitory G protein, Galpha(i2), in principal neurons of the forebrain. Transgene expression of Galpha(i2) markedly enhanced LTD and impaired late-phase LTP at Schaffer collateral synapses, with no associated differences in input/output relations, paired-pulse facilitation, or NMDA receptor-gated conductances. When paired with application of a type V phosphodiesterase inhibitor to elevate the concentration of intracellular cyclic GMP, constitutively active Galpha(i2) expression converted the transient depression normally caused by this treatment to an LTD that persisted after the drug was washed out. Moreover, this effect could be mimicked in control slices by pairing type V phosphodiesterase inhibitor application with application of a PKA inhibitor. Electrophysiological recordings of spontaneous excitatory postsynaptic currents and two-photon visualization of vesicular release using FM1-43 revealed that constitutively active Galpha(i2) tonically reduced basal release probability from the rapidly recycling vesicle pool of Schaffer collateral terminals. Our findings support the hypothesis that inhibitory G-protein signaling acts presynaptically to regulate release, and, when paired with elevations in the concentration of cyclic GMP, converts a transient cyclic GMP-induced depression into a long-lasting decrease in release. 相似文献
136.
In the U.S., diversion has increasingly become one of the most utilized alternatives to detention of delinquent youth. Programs providing diversion can vary greatly. Variations in program design make it difficult to evaluate the effectiveness of program outcomes. Utilizing hierarchical linear modeling, this study examines variations in outcome for ten program sites of the New York State MH/JJ Diversion Project. Program and youth predictors were evaluated on two outcomes: out-of- community placement and recidivism. At the individual level, significant mental health and substance abuse problems, age, prior placements, and use of wraparound funds were predictive of youth placements, while significant substance abuse problems were predictive of recidivism. Program variations were found to have a significant impact on youth outcomes. Specifically, sites providing direct (or "in house") care had significantly reduced rates of placement. Study results and implications for future research are discussed. 相似文献
137.
The Internet has gained great popularity among Chinese college students, but studies on Internet use behaviors and their relationship with sexual risk perception and behaviors have been limited. A survey was conducted among 1,845 college students in an eastern province of China, in order to assess the pattern of Internet use among Chinese college students, to examine the relationship of Internet use and HIV knowledge and susceptibility, and to explore the relationship of online risk behaviors with sexual status, sexual intention, and sexual perceptions. Data suggest that many students used the Internet frequently and often spent long hours online. Differences between genders and across grades were observed in the patterns of students' Internet use. Male students reported much higher rates of visiting pornographic websites or engaging in other online risk behaviors. Students' HIV knowledge or susceptibility did not differ by the extent of Internet use, but online risks were positively associated with their sexual status, sexual intention, and sexual perceptions. Students who were sexually active, planned to have sex, or possessed permissive attitudes toward pre-marital sex were more likely to report online risk behaviors such as visiting pornographic sites, cyberbullying, or distributing erotic materials via the Internet. The data underscore the importance to provide students with appropriate guidance on their Internet use, especially for reducing online risks and utilizing Internet as a source for sex education and HIV prevention. 相似文献
138.
The objective of this study was to ascertain the relationship among intravenous drug users between high levels of HIV risk-taking and both (a) deaths of significant others experienced before age 15, and (b) unresolved mourning; 592 out-of-treatment intravenous drug users (71.4% male; mean age = 40.5), stratified as to zip code, were recruited in San Jose, CA, as part of a CDC multisite investigation of access to sterile needles and HIV infection. HIV serostatus tests were obtained and an individual, structured interview administered covering demographics, employment, mental health, HIV risk-taking behavior, family contacts/closeness, and family deaths/mourning. Multivariate analyses indicated that the extent of HIV risk-taking in adulthood was highly and positively related to (a) the number of close-family-member deaths participants experienced as youth, (b) the extent to which respondents effectively mourned sudden family losses, (c) the extent to which those lost were emotionally close to the respondent, and (d) whether or not the respondent attended the funerals of lost relatives. Canonical correlations between sets of death/mourning and HIV risk-taking variables were .55 for the total sample (p < .001) and .70 for the subsample who experienced early and sudden family deaths (p < .001). In both analyses, it made little difference if age and gender were partialed out. These findings give credence to the importance of (a) unexpected deaths experienced early in life, and (b) related, inadequate mourning, as factors in progressively higher adult HIV risk-taking. They suggest that treatment for such individuals and their families should involve grief work dealing with unresolved losses within the family of origin. In addition, prevention efforts may have to revise their modus operandi toward both more focused and more family-based methods of outreach and engagement. 相似文献
139.
Fuller JA Stanton JM Fisher GG Spitzmuller C Russell SS Smith PC 《The Journal of applied psychology》2003,88(6):1019-1033
The present study investigated processes by which job stress and satisfaction unfold over time by examining the relations between daily stressful events, mood, and these variables. Using a Web-based daily survey of stressor events, perceived strain, mood, and job satisfaction completed by 14 university workers, 1,060 occasions of data were collected. Transfer function analysis, a multivariate version of time series analysis, was used to examine the data for relationships among the measured variables after factoring out the contaminating influences of serial dependency. Results revealed a contrast effect in which a stressful event associated positively with higher strain on the same day and associated negatively with strain on the following day. Perceived strain increased over the course of a semester for a majority of participants, suggesting that effects of stress build over time. Finally, the data were consistent with the notion that job satisfaction is a distal outcome that is mediated by perceived strain. 相似文献
140.