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191.
Subjects responding to receive monetary reinforcement on a fixed interval schedule were read instructions containing varying amounts of information regarding the schedule contingencies prior to their participation in the experiment. In addition, some subjects were exposed to an additional response cost contingency for early responding. The results indicate that reliable low-rate fixed interval responding can be rapidly generated in a single 45-minute experimental session when subjects are provided with explicit instructions together with the response cost contingency.
相似文献192.
An experiment was conducted to assess the effects of a same-sex model on females' eating behavior. The model ate either a large or small quantity along with the subject in an ad lib satiation context, and either did or did not identify herself as a dieter. Subjects were 86 female undergraduates, split into normally dieting or nondieting subgroups. Number of sandwich quarters consumed ad lib following a small fixed preload was found to vary as a function of (a) model's consumption (b) model's dieter status and (c) subject's dieter status; there were no significant interactions. A subsequent taste-rating assessment of nut consumption, in which the model was present but could neither see nor be seen by the subject, indicated that the three factors which had previously affected sandwich consumption independently combined to affect nut consumption interdependently. The results were interpreted in terms of the effect of the model on the quantity and pattern of consumption, and conclusions were drawn about the dynamics of restrained and unrestrained eating and implications for therapy. 相似文献
193.
C P Herman J Polivy P Pliner J Threlkeld D Munic 《Journal of personality and social psychology》1978,36(5):536-548
Two experiments were performed in an investigation of the effects of distraction and emotional arousal on the proofreading performance of dieting female subjects. In Experiment 1, it was found that distraction initially impaired the performance of dieters and facilitated the performance of nondieters, a pattern previously shown by Rodin to apply to obese and normal weight subjects, respectively, and interpreted as evidence of greater externality in the obese. Subsequent retesting of the same subjects in succeeding months, however, revealed a complete reversal of the original results. In Experiment 2, the reaction to distraction found in the first phase of Experiment 1 was obtained when subjects were in a situation of minimal threat. In a situation of high threat, the relative distractibility of dieters was reversed, as in the latter phases of Experiment 1. An explanation is offered for these data in terms of the greater emotionality of dieters, the susceptibility of cognitive performance to arousal (distraction, anxiety) manipulations, and the potentially competing effects of distraction and anxiety. Implications for the prevailing "trait" view of externality (stimulus binding) are discussed. 相似文献
194.
Herman Dishkant 《Studia Logica》1978,37(2):149-155
An attempt is made to include the axioms of Mackey for probabilities of experiments in quantum mechanics into the calculus
x0
of ukasiewicz. The obtained calculusQ contains an additional modal signQ and four modal rules of inference. The propositionQx is read x is confirmed. The most specific rule of inference may be read: for comparable observations implication is equivalent to confirmation of material implication.The semantic truth ofQ is established by the interpretation with the help of physical objects obeying to the rules of quantum mechanics. The embedding of the usual quantum propositional logic inQ is accomplished.Allatum est die 9 Junii 1976 相似文献
195.
196.
Herman Philipse 《International Journal of Philosophical Studies》2013,21(3):385-399
Continental philosophers such as Heidegger and Nicolai Hartmann and analytic philosophers such as Ryle, Strawson, and Jennifer Hornsby may be interpreted as using competing intellectual strategies within the framework of one and the same research programme, the programme of developing a natural conception of the world. They all argue that the Manifest Image of the world (to use Sellars's terminology) is compatible with, or even more fundamental than, the Scientific Image. A comparative examination of these strategies shows that Hartmann's strategy of stratification is superior to those of Heidegger, Ryle, and Strawson. 相似文献
197.
The authors present a model that explains how subordinates perceive the power of their supervisors and the causal mechanisms by which these perceptions translate into subordinate outcomes. Drawing on identity and resource-dependence theories, the authors propose that supervisors have power over their subordinates when they control resources needed for the subordinates' enactment and maintenance of current and desired identities. The joint effect of perceptions of supervisor power and supervisor intentions to provide such resources leads to 4 conditions ranging from highly functional to highly dysfunctional: confirmation, hope, apathy, and progressive withdrawal. Each of these conditions is associated with specific outcomes such as the quality of the supervisor-subordinate relationship, turnover, and changes in the type and centrality of various subordinate identities. 相似文献
198.
Effect size and power in assessing moderating effects of categorical variables using multiple regression: a 30-year review 总被引:1,自引:0,他引:1
The authors conducted a 30-year review (1969-1998) of the size of moderating effects of categorical variables as assessed using multiple regression. The median observed effect size (f(2)) is only .002, but 72% of the moderator tests reviewed had power of .80 or greater to detect a targeted effect conventionally defined as small. Results suggest the need to minimize the influence of artifacts that produce a downward bias in the observed effect size and put into question the use of conventional definitions of moderating effect sizes. As long as an effect has a meaningful impact, the authors advise researchers to conduct a power analysis and plan future research designs on the basis of smaller and more realistic targeted effect sizes. 相似文献
199.
Previous studies of the navigational abilities of nonhuman primates have largely been limited to what could be described by
a human observer with a pen and paper. Consequently, we have developed a system that uses a pair of cameras to automatically
obtain the three-dimensional trajectory of rhesus monkeys performing an outdoor spatial navigation and memory task. The system
provides trajectories, path length, speed, and other variables that would be impossible for an unaided observer to note. From
trajectory data, we computed and validated a path-length measurement. We use this measurement to compare the navigation abilities
of several animals. In addition, we provide quantitative data on the accuracy of a method for automatic behavior detection.
Currently, the system is being used to examine the sex differences in spatial navigation of rhesus monkeys. We expect that
measures derived from the trajectory data will reveal strategies used by animals to solve spatial problems. 相似文献
200.