全文获取类型
收费全文 | 1109篇 |
免费 | 110篇 |
国内免费 | 211篇 |
出版年
2024年 | 2篇 |
2023年 | 15篇 |
2022年 | 34篇 |
2021年 | 29篇 |
2020年 | 31篇 |
2019年 | 35篇 |
2018年 | 42篇 |
2017年 | 59篇 |
2016年 | 42篇 |
2015年 | 28篇 |
2014年 | 38篇 |
2013年 | 110篇 |
2012年 | 68篇 |
2011年 | 85篇 |
2010年 | 83篇 |
2009年 | 71篇 |
2008年 | 69篇 |
2007年 | 96篇 |
2006年 | 90篇 |
2005年 | 68篇 |
2004年 | 62篇 |
2003年 | 52篇 |
2002年 | 45篇 |
2001年 | 28篇 |
2000年 | 22篇 |
1999年 | 15篇 |
1998年 | 12篇 |
1997年 | 10篇 |
1996年 | 6篇 |
1995年 | 11篇 |
1994年 | 10篇 |
1993年 | 7篇 |
1992年 | 2篇 |
1991年 | 4篇 |
1988年 | 6篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1983年 | 5篇 |
1982年 | 4篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1972年 | 3篇 |
1971年 | 4篇 |
1970年 | 1篇 |
1968年 | 1篇 |
1967年 | 1篇 |
排序方式: 共有1430条查询结果,搜索用时 0 毫秒
41.
A problem with interpretations of differences in mathematic achievement between students from Asian countries and those from the United States is the seemingly implicit assumption of the cultural homogeneity of Asian societies. Researchers rarely measure the effects of variables within cultures that are hypothesized to be related to differences across cultures. In the present study, the authors examined the effects of socioeconomic status (SES) and quality of instruction on Chinese students' (1st, 3rd, and 5th grades) understanding of distance, time, and speed. The results indicated that (a) low SES in China can impede the development of children's mathematical cognition and (b) higher SES does not guarantee better performance. The implication is that the gap in mathematical performance between socioeconomically advantaged and disadvantaged children can be narrowed or even eliminated through instructional practices that focus on the systematic training of children's mathematical thinking. 相似文献
42.
In a series of experiments, participants reached to targets in the presence of visual distracters that were either adjacent to the target or located along the reach path. The reaching movements were affected by the presence of the distracters, with the movement paths deviating toward the distracters. Those deviations were observed under two different conditions: (a) one in which the distracter could potentially have been a movement target; and (b) another in which the distracter never was a possible target. Because the movement was affected by the distracter in both situations, the results suggested that response competition is not necessary for distracter-induced reach-path deviations. Instead, the authors propose that attention to a distracter is sufficient to affect the to-target movement. The movement deviations may reveal an effective mechanism for coping with stimulus-rich environments. 相似文献
43.
Stout SC Chang R Miller RR 《Journal of experimental psychology. Animal behavior processes》2003,29(1):23-38
Four conditioned lick suppression experiments with rats examined the effect of trial spacing on cue interaction. Experiments 1 and 2 found overshadowing to be eliminated with massed compound stimulus-outcome pairings and the usual trial spacing effect to be reversed with compound acquisition trials. Experiment 3 found that whether acquisition compound-outcome pairings were massed or spaced determined the effect of posttraining extinction treatment. Extinction of the overshadowing cue reduced responding following massed training and increased responding following spaced training. Extinction of the context decreased responding following massed training. Experiment 4 found the conditioning and devaluation results to be associative and stimulus specific. These results are in accord with the extended comparator hypothesis (J. C. Denniston, H. I. Savastano, & R. R. Miller, 2001). 相似文献
44.
A theory of diversity in speeded cognition, the difference engine, is proposed, in which information processing is represented
as a series of generic computational steps. Some individuals tend to perform all of these computations relatively quickly
and other individuals tend to perform them all relatively slowly, reflecting the existence of a general cognitive speed factor,
but the time required for response selection and execution is assumed to be independent of cognitive speed. The difference
engine correctly predicts the positively accelerated form of the relation between diversity of performance, as measured by
the standard deviation for the group, and task difficulty, as indexed by the mean response time (RT) for the group. In addition,
the difference engine correctly predicts approximately linear relations between the RTs of any individual and average performance
for the group, with the regression lines for fast individuals having slopes less than 1.0 (and positive intercepts) and the
regression lines for slow individuals having slopes greater than 1.0 (and negative intercepts). Similar predictions are made
for comparisons of slow, average, and fast subgroups, regardless of whether those subgroups are formed on the basis of differences
in ability, age, or health status. These predictions are consistent with evidence from studies of healthy young and older
adults as well as from studies of depressed and age-matched control groups. 相似文献
45.
A rodent model of diencephalic amnesia, pyrithiamine-induced thiamine deficiency (PTD), was used to investigate diencephalic-hippocampal interactions. Acetylcholine (ACh) release, a marker of memory-related activation, was measured in the hippocampus of PTD-treated and control rats prior to, during, and after spontaneous alternation test. During behavioral testing, all animals displayed increases in ACh release. However, both the percent increase of ACh release during spontaneous alternation testing and the alternation scores were higher in control rats relative to PTD-treated rats. Thus, when rats are tested on a task with demands dependent on the hippocampus, it appears that the hippocampus is not fully activated after diencephalic damage. 相似文献
46.
This study examined 2-point discrimination performance in 1 st-degree biological relatives (n = 39) of individuals with schizophrenia and normal adult control participants (n = 30) recruited from the community. They completed an objective 2-point discrimination task, adapted for use with a signal detection approach to permit separation of discriminability (i.e., sensitivity, d') from response bias/ criterion (or motivation, lnbeta). Relatives revealed poorer performance on the d' index compared with controls. The 2 groups did not differ on lnbeta, suggesting a genuine difference in sensitivity but not response bias. The sensitivity deficit might reflect decreased spatial acuity and/or impaired intensity cue processing of tactile stimuli. Poor performance on the d' index was most closely associated with 2 schizotypic features, namely "odd beliefs/magical thinking." 相似文献
47.
The authors compared levels of optimistic and pessimistic bias in the prediction of positive and negative life events between European Americans and Japanese. Study 1 showed that European Americans compared with Japanese were more likely to predict positive events to occur to self than to others. The opposite pattern emerged in the prediction of negative events. Study 2 replicated these cultural differences. Furthermore, positive associations emerged between predictions and occurrence of life events 2 months later for both European Americans and Japanese. Across both studies, results of within-groups analyses indicated that both groups expected negative events to be more likely to occur to others than to self (optimistic bias). In addition, Japanese expected positive events to be more likely to occur to others than to self (pessimistic bias). However, European Americans failed to show the expected optimistic bias for positive events. 相似文献
48.
49.
50.