全文获取类型
收费全文 | 47624篇 |
免费 | 930篇 |
国内免费 | 8篇 |
专业分类
48562篇 |
出版年
2020年 | 520篇 |
2019年 | 648篇 |
2018年 | 876篇 |
2017年 | 928篇 |
2016年 | 902篇 |
2015年 | 675篇 |
2014年 | 768篇 |
2013年 | 3603篇 |
2012年 | 1376篇 |
2011年 | 1553篇 |
2010年 | 975篇 |
2009年 | 933篇 |
2008年 | 1295篇 |
2007年 | 1216篇 |
2006年 | 1112篇 |
2005年 | 941篇 |
2004年 | 890篇 |
2003年 | 915篇 |
2002年 | 877篇 |
2001年 | 1737篇 |
2000年 | 1696篇 |
1999年 | 1201篇 |
1998年 | 531篇 |
1997年 | 456篇 |
1996年 | 420篇 |
1992年 | 1007篇 |
1991年 | 963篇 |
1990年 | 943篇 |
1989年 | 891篇 |
1988年 | 842篇 |
1987年 | 809篇 |
1986年 | 800篇 |
1985年 | 856篇 |
1984年 | 673篇 |
1983年 | 549篇 |
1981年 | 416篇 |
1979年 | 627篇 |
1978年 | 483篇 |
1977年 | 443篇 |
1976年 | 418篇 |
1975年 | 578篇 |
1974年 | 639篇 |
1973年 | 648篇 |
1972年 | 567篇 |
1971年 | 472篇 |
1970年 | 440篇 |
1969年 | 506篇 |
1968年 | 565篇 |
1967年 | 479篇 |
1966年 | 555篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
Prior research has indicated that frequent feedback could reduce residential electricity consumption by 10% to 15%. However, because feedback was primarily given in written form, this procedure might not be practical. The present study evaluated a potentially more practical feedback procedure during peak-use periods with high electricity consuming households. The study was conducted during the winter in an upper-middle class neighborhood of almost identical, all-electric townhouses (N = 71) that averaged about 170 KWH per day per household for a monthly bill of over $200. Twelve households received daily written feedback. Sixteen households (self-monitoring) were taught to read their outdoor electricity meter and to record KWH used every day. A comparison group was composed of 14 households that had volunteered to participate and 29 others that had only given permission to have their meters read. During a 1-month period that the procedures were in effect, the feedback group reduced consumption by 13% and the self-monitoring group by about 7%. These reductions, relative to the comparison group, were maintained during an early spring 1-month follow-up period and, to a lesser extent, during a 6-week warm spring period. Self-monitoring participants were highly reliable and persistent meter readers. Reductions in electricity use were reported by households to be largely attributable to lowering of the heat thermostat, and large monetary and KWH savings were found. Techniques to make self-monitoring cost-effective important components of the self-monitoring procedure, methods to apply self-monitoring more broadly, and plans to combine behavioral procedures with physical technology are discussed. 相似文献
982.
A S Masten 《Family process》1979,18(3):323-335
The value of family therapy as a treatment for child psychopathology is considered by reviewing pertinent outcome research. Fourteen studies that met three criteria are included in the review: (a) a child or adolescent was the identified patient or referral; (b) therapy included at least one parent and the child; and (c) outcome was evaluated in terms of the child's symptoms. There are major shortcomings in most of the available data, with only two well-controlled studies. Some empirical evidence does exist that family therapy is an effective treatment for children; the data from studies of adolescents are especially encouraging. However, insufficient data are available for comparing the relative merits of conjoint family treatment and individual child therapy. If the value of family therapy as a treatment alternative or, ideally, as the "treatment of choice" for a referred individual child is to be established, more and better controlled comparative outcome studies will be necessary. Suggestions for future research are presented emphasizing the need for a developmental perspective by recommending, for example, the use of factorial designs in which the intervenaction of treatment and age can be analyzed. 相似文献
983.
Conceptual and methodological shortcomings of research on family and interactional psychopathology are owing mainly to the use of vague and ill-defined concepts of communication. Based on a theory of language use and communication within general social and cognitive psychology (e.g., Heider, Mead, Piaget, Rometvet) Blakar has outlined a methodology by which interaction is analyzed in terms of how and to what extent the participants (families) manage or fail to cope with the various prerequisites for successful communication under varying situational conditions. A study illustrating this program is presented: The interaction of twelve families, six with (Group S) and six without (Group N) a schizophrenic member, is analyzed in Blakar's communication conflict situation with respect to the members' ability to decenter and take the perspective of each other. Group S proved significantly more egocentric, their egocentric attitudes resulting, as would be expected, in very inefficient communication. Moreover, Group S were not able to adapt their pattern of communication to the changing situational requirements. Finally, the subtle interplay between the capacities and behavior of the individual members and the family system is illustrated: the egocentrism of the members resulted in "closed systems," and the closed systems hindered adequate feedback, forcing the members to decenter. 相似文献
984.
Several social and research issues directly affected the development and implementation of multivariate assessment in a large community-based applied research program. Examples are drawn from experiences of the Preparation through Responsive Educational Programs Project for disruptive and skill deficient adolescents in suburban, rural, and urban junior high school settings, focusing on the assessment of academic and social skill development and long-term skill maintenance. The social context altered both project treatment and follow-up plans, requiring assessment of potentially unintended effects and decreasing consistency across sites. Future community acceptance of such programs may depend on the investigators' adaptation to diverse community pressures for program conduct and assessment and the measurement of phenomena that are not always directly observable. 相似文献
985.
At a crosswalk on a busy street, a confederate, sketching a drawing or not, stood close or far from a pedestrian for 10 sec before the street light indicated “Walk.” In the first study, pedestrians were given the opportunity to subsequently help this confederate or another accomplice by calling attention to a dropped pen. In the second study, crossing speeds were timed and pedestrians were asked to record their mood and reactions to “another pedestrian,” who happened to be the confederate. These studies tested and found evidence for both cognitive and arousal explanations of reactions to spatial invasions. Cognitive and attributional theories imply that characteristics of the invader are important mediators of reactions to the invasion. The close nonartist was judged to be more inappropriate, produced faster escape speeds, and was helped less than the close artist or the far confederates. Arousal explanations imply that any invasion produces a generalized reaction which would be unrelated to characteristics of the invader. The other accomplice was helped less when the subject had been invaded and this reduction in helping was unaffected by the artist manipulation. These findings suggest a general arousal response to any invasion with a subsequent reliance on cognitive interpretations. 相似文献
986.
Howard S Friedman 《Journal of experimental social psychology》1979,15(5):453-469
The influence of facial expressions of emotion on perceptions of affective sentence meaning was investigated by pairing happy, angry, suprised, and sad faces of “teachers” with sentences of varying affective tone. Ninety-five students judged the overall meaning communicated by these paired stimuli. The design allowed exploration of unique facial-verbal combination effects, overall cue integration effects, and sex differences. Clear effects of cue combinations emerged. Perceived sincerity was found to be a function of the consistency of evaluative (positivity) but not dominance cues. Perceived positivity was an interactive function of both evaluative cues and dominance cues. Perceived dominance was affected by the interaction of evaluative cues. The subtleties of cue combination were clarified through open-ended dependent measures. Also, as expected, females were found to be more sensitive than males to verbal-nonverbal cue conflict in perceptions of sincerity. However, no other sex differences were found. The findings were discussed with regard to the need for a firm empirical base upon which to integrate verbal and nonverbal research traditions in the communication of affective meaning. 相似文献
987.
K Bloom 《Journal of experimental child psychology》1979,27(1):60-70
The use of the operant conditioning paradigm, as it has been applied to infant social, vocal behavior, reflects a failure to take into account the social nature of human infants over and above the rigid theoretical rationale of the paradigm. It is argued that: (1) the baseline procedure used in operant conditioning studies is methodologically and conceptually invalid; (2) the reinforcing stimulus used in social conditioning studies elicits the very response that it is assigned to reinforce; and (3) the effect of the response-reinforcer relationship is not the reinforcement (strengthening) of vocal response rate. 相似文献
988.
Thirty-two infants aged 14 and 20 weeks were presented with a live face in each of eight conditions, which consisted of all combinations of (a) a 0° or 90° orientation; (b) familiar face (the infant's mother) or distinctively unfamiliar face; and (c) talking or silent context. The previous findings that younger infants smile longer at 0° than at 90° faces and that this differential responsiveness to orientation wanes with increasing age were replicated; the hypothesis that older infants would smile longest at their mothers' talking faces in the 0° orientation was confirmed. In addition, infants of both ages smiled more at their mothers than at the stranger, although this effect interacted with orientation and sex of the infant. 相似文献
989.
Susan T. Fiske Shelley E. Taylor Nancy L. Etcoff Jessica K. Laufer 《Journal of experimental social psychology》1979,15(4):356-377
Three studies were conducted to test whether imagery accounts for the effects of empathy on attributions, that is, whether attributers construct and scan a mental image of social scenarios the same way that actual participants scan a real environment. According to this interpretation, attributers “see” the world as the participant does and make vicarious attributions. An alternative interpretation holds that subjects base vicarious attributions on recreating the motivations and affect of the actor, so that imaging is irrelevant to empathy and attributions. In the first study, subjects who imagined a story from the perspective of a particular character later showed differential recall of story details as a function of role, but not differential attributions. In Experiment 2, role-taking subjects showed clear effects of imaged perspective on recall for story details, but no effects on attributions of causality for an accident. Further, recall and attribution were uncorrelated. In the last study, empathy and imagery role-taking instructions produced independent effects: imagers showed pronounced perspective-relevant recall and empathizers did not. Neither showed unambiguous vicarious attributions. Recall and attribution were again uncorrelated. These studies suggest that the imagery explanation of empathy effects is untenable, and imply that the recall of perspective-relevant details is unlikely to mediate attributions of causality in imaginary scenarios. 相似文献
990.
M L Snyder R E Kleck A Strenta S J Mentzer 《Journal of personality and social psychology》1979,37(12):2297-2306
We demonstrated a general strategy for detecting motives that people wish to conceal. The strategy consists of having people choose between two alternatives, one of which happens to satisfy the motive. By counterbalancing which one does so, it is possible to distill the motive by examining the pattern of choices that people make. The motive used in the demonstration is the desire we believe most people have to avoid the physically handicapped. Because they do not wish to reveal this desire, we predicted that they would be more likely to act on it if they could appear to choose on some other basis. In two studies we found that people avoided the handicapped more often if the decision to do so was also a decision between two movies and avoidance of the handicapped could masquerade as a movie preference. 相似文献