全文获取类型
收费全文 | 7492篇 |
免费 | 635篇 |
国内免费 | 557篇 |
出版年
2024年 | 23篇 |
2023年 | 187篇 |
2022年 | 122篇 |
2021年 | 177篇 |
2020年 | 326篇 |
2019年 | 342篇 |
2018年 | 346篇 |
2017年 | 375篇 |
2016年 | 340篇 |
2015年 | 228篇 |
2014年 | 245篇 |
2013年 | 1099篇 |
2012年 | 183篇 |
2011年 | 222篇 |
2010年 | 211篇 |
2009年 | 249篇 |
2008年 | 330篇 |
2007年 | 413篇 |
2006年 | 397篇 |
2005年 | 328篇 |
2004年 | 316篇 |
2003年 | 226篇 |
2002年 | 195篇 |
2001年 | 134篇 |
2000年 | 127篇 |
1999年 | 88篇 |
1998年 | 52篇 |
1997年 | 71篇 |
1996年 | 54篇 |
1995年 | 36篇 |
1994年 | 37篇 |
1993年 | 23篇 |
1992年 | 20篇 |
1991年 | 15篇 |
1990年 | 6篇 |
1989年 | 10篇 |
1988年 | 7篇 |
1985年 | 86篇 |
1984年 | 98篇 |
1983年 | 78篇 |
1982年 | 75篇 |
1981年 | 79篇 |
1980年 | 88篇 |
1979年 | 81篇 |
1978年 | 115篇 |
1977年 | 88篇 |
1976年 | 107篇 |
1975年 | 78篇 |
1974年 | 82篇 |
1973年 | 62篇 |
排序方式: 共有8684条查询结果,搜索用时 15 毫秒
891.
892.
Gerold E Robbins 《Journal of research in personality》1975,9(1):74-84
Subjects were assigned the task of forming an impression of another person with information being gathered from two conflicting sources. One half were given a positive first impression, and one half were given a negative first impression before allowing them to select additional information. Final ratings were made when Ss indicated that they had taken sufficient information. Dogmatic Ss took in less information before passing “final judgment,” gave more extreme stability ratings, expressed greater liking for their agreed-with source, and showed a trend toward a preference for explaining away impression-discrepant information rather than to withhold judgment. 相似文献
893.
Charles L Gruder Bruce Korth Mary Dichtel Bernard Glos 《Journal of research in personality》1975,9(1):85-95
Two experimetnal tests were conducted of a model which predicts social comparison choices of extreme scores on a personality inventory. In groups of nine, subjects completed a bogus personality inventory that ostensibly measured a desirable or undesirable trait, and were told that either the highest or the lowest obtained score was a positive instance of the trait. The highest score was located for the subjects either with certainty or uncertainty, and the two experiments employed different manipulations of this factor. In both experiments the pattern of subjects' social comparison choices of other subjects' scores was fit best by a model comprising main effects of each factor and interactions between desirability and positive instance and between desirability and certainty. 相似文献
894.
H.M. Jenkins 《Learning and motivation》1973,4(2):115-137
In learning a successive go/no-go discrimination between a positive display consisting of the elements A and B, and negative display consisting of A-alone, pigeons first trained to peck A shift to pecking the distinguishing B element. In order to learn whether or not the shift to B is facilitated by B's function as a signal of the reinforcer, apart from the direct reinforcement of B responses, six arrangements of the elements with respect to the food reinforcer were used. Discrete trials were terminated by a single peck or after 4 sec. The A and B elements were dots of different color. The most critical comparison was between two groups, both of which received no reinforcement for a response directed to B. In one case, B signaled the reinforcer: An A response was reinforced when B was present but not when A appeared alone. In the other, B signaled the absence of a reinforcer: An A response was nonreinforced when B was present, while the response to A-alone was reinforced. During training and in extinction many more reponses were made to B when it signaled the reinforcer than when it signaled its absence. It is concluded that in a discrimination between AB positive and A negative the shift from pecking A to pecking B is facilitated by B's role as a signal for the reinforcer even on trials in which the peck is not made to B. Results from certain other groups showed that, unless pecks shifted to B within the positive display, pecks to A continued on the negative, A-alone trials as well as on the positive AB trials. 相似文献
895.
Elizabeth D. Capaldi 《Learning and motivation》1973,4(2):229-235
The performance of rats trained in a straight alley for 55 trials under 75% body weight and then shifted to 90% body weight was compared to that of rats trained only under 90% body weight. When training was with a small reward the speed of the shifted group decreased to the level of the 90% small reward control groups, but when training was with a large reward the speed of the shifted group dropped below the level of the 90% large reward control group. Thus, the effects on performance of shifting deprivation level following extended training depend on the reward magnitude employed. 相似文献
896.
Bow Tong Lett 《Learning and motivation》1973,4(3):237-246
Without the aid of secondary rewards to bridge the temporal gap, each of 15 rats learned to select the rewarded side of a T-maze although the reward was delayed until 1 min after the response was emitted. Similar results were obtained from another group of eight rats for which the length of the delay was 5 min. In a final experiment using the same basic procedure, five groups of rats were trained for 25 days with delays of 0.5, 1.0, 2.0, 4.0, or 8.0 min. The percentage of correct responses did not significantly differ among groups. According to prevailing psychological theory, these results are impossible. 相似文献
897.
Anthony M Alfano 《Journal of Vocational Behavior》1973,3(3):329-333
The purpose of this study was to develop a scale that could measure attitude toward work and be used to determine the relation between length of unemployment time and work attitudes. Standardization of the Employment Readiness Scale was completed through its administration to three independent groups (N = 430): (1) employed workers: employees who worked in unskilled, semiskilled, and occasionally skilled job classifications; (2) unemployed individuals who were actively looking for regular employment at the Tennessee State Employment Service; and (3) the chronically unemployed: individuals, who, for the most part, were not looking for regular employment and who were seeking night lodging and meals at the Salvation Army or the Knoxville Union Rescue Mission. Through item analysis, it was determined that 43 of the 45-scale items were significant at or beyond the .01 level. It was further established that a relationship existed between work attitudes and length of unemployment. The longer an individual was unemployed, the less positive was his attitude toward work. 相似文献
898.
899.
900.