全文获取类型
收费全文 | 64821篇 |
免费 | 2738篇 |
国内免费 | 37篇 |
专业分类
67596篇 |
出版年
2020年 | 658篇 |
2019年 | 790篇 |
2018年 | 1100篇 |
2017年 | 1084篇 |
2016年 | 1224篇 |
2015年 | 869篇 |
2014年 | 1022篇 |
2013年 | 4740篇 |
2012年 | 1961篇 |
2011年 | 1933篇 |
2010年 | 1190篇 |
2009年 | 1214篇 |
2008年 | 1675篇 |
2007年 | 1668篇 |
2006年 | 1475篇 |
2005年 | 1362篇 |
2004年 | 1300篇 |
2003年 | 1178篇 |
2002年 | 1213篇 |
2001年 | 2111篇 |
2000年 | 2044篇 |
1999年 | 1500篇 |
1998年 | 688篇 |
1997年 | 612篇 |
1996年 | 585篇 |
1992年 | 1345篇 |
1991年 | 1251篇 |
1990年 | 1254篇 |
1989年 | 1143篇 |
1988年 | 1135篇 |
1987年 | 1065篇 |
1986年 | 1089篇 |
1985年 | 1200篇 |
1984年 | 949篇 |
1983年 | 850篇 |
1982年 | 641篇 |
1979年 | 1065篇 |
1978年 | 718篇 |
1977年 | 680篇 |
1976年 | 685篇 |
1975年 | 870篇 |
1974年 | 1014篇 |
1973年 | 1086篇 |
1972年 | 921篇 |
1971年 | 846篇 |
1970年 | 818篇 |
1969年 | 829篇 |
1968年 | 1074篇 |
1967年 | 927篇 |
1966年 | 858篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
921.
922.
Invariance in the MMPI's component structure 总被引:1,自引:0,他引:1
I H Bernstein G Teng B D Grannemann C P Garbin 《Journal of personality assessment》1987,51(4):522-531
Bernstein and Garbin (1985b) suggested that the Minnesota Multiphasic Personality Inventory's major clinical scales (excluding Scales ? and 5) can be approximated by an oblique three-component structure: (a) Profile Elevation, (b) Test-taking Attitudes, and (c) Optimism-Pessimism, collectively termed the salient weight model. In this study, we found that both this model and the MMPI's principal component structure remain invariant across race, sex, and, as previously noted, context of testing (job applicants vs. inmates in correctional institutions). We further noted that several alternative definitions of Profile Elevation provide equally satisfactory representation of the relations among the scales. This factor invariance is necessary, but not sufficient, for the MMPI to be viewed as unbiased. 相似文献
923.
The prediction of drug use among college students from MMPI, MCMI, and sensation seeking scales 总被引:1,自引:0,他引:1
This study examines the ability of five self-report assessment measures to predict college students' drug use across 12 pharmacological drug categories. Subjects were 125 female and 61 male university undergraduate students. The test battery included the following instruments: the Psychopathic Deviancy (Pd) scale of the Minnesota Multiphasic Personality Inventory (MMPI); the MacAndrew Alcoholism scale (MAC), a special scale of the MMPI; the Sensation Seeking Scale (SSS); the Millon Alcohol Abuse Scale; and the Millon Drug Abuse Scale. Scores from these instruments were utilized in linear combinations to predict individual drug use outcomes as well as polydrug versus single drug use patterns. The drug categories included in this investigation are coffee, tobacco, alcohol, marijuana, tranquilizers, depressants, amphetamines, LSD, other hallucinogens, solvents, narcotics, and cocaine. Results demonstrate significant and meaningful relationships between predictors and drug use levels among college students. Weighted equations derived from linear discriminant function analyses were generally capable of accurately classifying subject's drug use levels across drug categories and in discriminating single drug use from polydrug use patterns. Typically, the Sensation Seeking Scale entered as the most powerful predictor of substance use and abuse. 相似文献
924.
The operant conditioning of response variability: Free-operant versus discrete-response procedures 总被引:2,自引:2,他引:0 下载免费PDF全文
Morris CJ 《Journal of the experimental analysis of behavior》1987,47(3):273-277
The operant conditioning of response variability under free-operant and discrete-response procedures was investigated. Two pigeons received food only if their pattern of four pecks on two response keys differed from the patterns emitted on the two immediately preceding trials. Under the free-operant procedure, the keys remained illuminated and operative throughout each trial. There was little variability in the response patterns that resulted, and the pigeons received fewer than one third of the available reinforcers. Under the discrete-response procedure, a brief timeout period followed each response. Variability increased under this procedure, and the pigeons obtained three fourths of the available reinforcers. Previous successes and failures to produce response variability may have been due to the use or failure to use, respectively, a discrete-response procedure. Respondent effects inherent in the free-operant procedure may encourage the development of response stereotypy and, in turn, prevent the development of response variability. 相似文献
925.
Richard C. Erickson Ph.D. 《Pastoral Psychology》1987,35(3):163-171
The psychology of self-esteem bypasses consequential issues of everyday behavior and moral responsibility in favor of pursuing a global goal of enhanced self-esteem on the assumption that happiness, success, and responsible behavior will automatically follow. The goal is vague and ways of achieving it are confused and conflicting. Greater attention to concrete tasks and challenges and sensitivity to moral issues could help make therapy more clear, effective, and socially useful. 相似文献
926.
927.
928.
929.
930.