全文获取类型
收费全文 | 1878篇 |
免费 | 54篇 |
出版年
2023年 | 12篇 |
2022年 | 14篇 |
2021年 | 13篇 |
2020年 | 30篇 |
2019年 | 34篇 |
2018年 | 39篇 |
2017年 | 50篇 |
2016年 | 36篇 |
2015年 | 24篇 |
2014年 | 40篇 |
2013年 | 199篇 |
2012年 | 60篇 |
2011年 | 79篇 |
2010年 | 59篇 |
2009年 | 50篇 |
2008年 | 71篇 |
2007年 | 70篇 |
2006年 | 69篇 |
2005年 | 60篇 |
2004年 | 70篇 |
2003年 | 69篇 |
2002年 | 74篇 |
2001年 | 29篇 |
2000年 | 31篇 |
1999年 | 30篇 |
1998年 | 30篇 |
1997年 | 27篇 |
1996年 | 29篇 |
1995年 | 42篇 |
1994年 | 30篇 |
1993年 | 33篇 |
1992年 | 22篇 |
1991年 | 30篇 |
1990年 | 17篇 |
1989年 | 25篇 |
1988年 | 18篇 |
1987年 | 16篇 |
1986年 | 21篇 |
1985年 | 27篇 |
1984年 | 27篇 |
1983年 | 31篇 |
1982年 | 22篇 |
1981年 | 34篇 |
1980年 | 15篇 |
1979年 | 25篇 |
1978年 | 21篇 |
1977年 | 19篇 |
1976年 | 17篇 |
1975年 | 15篇 |
1973年 | 8篇 |
排序方式: 共有1932条查询结果,搜索用时 31 毫秒
111.
We examine whether children with early unilateral brain injury show an IQ decline over the course of development. Fifteen brain injured children were administered an IQ test once before age 7 and again several years later. Post-7 IQ scores were significantly lower than pre-7 IQ scores. In addition, pre-7 IQ scores were lower for children with larger lesions, but children with smaller lesions and higher pre-7 IQ scores showed a greater IQ decline over time. These findings suggest that the cognitive outcomes of children with early lesions, particularly those with relatively small lesions, change over the course of development. 相似文献
112.
Jaakkola K Fellner W Erb L Rodriguez M Guarino E 《Journal of comparative psychology (Washington, D.C. : 1983)》2005,119(3):296-303
In 2 experiments, bottlenose dolphins (Tursiops truncatus) judged the ordinal relationship between novel numerosities. The dolphins were first trained to choose the exemplar with the fewer number of items when presented with just a few specific comparisons (e.g., 2 vs. 6, 1 vs. 3, and 3 vs. 7). Generalization of this rule was then tested by presenting the dolphins with all possible pairwise comparisons between 1 and 8. The dolphins chose the exemplar with the fewer number of items at levels far above chance, showing that they could recognize and represent numerosities on an ordinal scale. Their pattern of errors was consistent with the idea of an underlying analog magnitude representation. 相似文献
113.
This review identified 1275 studies examining cognitive deficits in people with schizophrenia, published between 1990 and
2003. Data from 113 studies (4365 patients and 3429 controls) were combined in a meta-analysis carried out on the five cognitive
domains of IQ, memory, language, executive function, and attention. Studies were excluded where they lacked a suitable control
group or failed to present complete information. In all five cognitive domains, analysis indicated a consistent trend for
patients to perform more poorly than healthy controls, with significant heterogeneity across studies. Sources of heterogeneity
were analyzed and a need to ensure more appropriate composition of patient and control groups and to adopt a more refined
and methodologically correct, hypothesis-driven approach was identified. 相似文献
114.
Latent class analysis (LCA) provides a means of identifying a mixture of subgroups in a population measured by multiple categorical indicators. Latent transition analysis (LTA) is a type of LCA that facilitates addressing research questions concerning stage-sequential change over time in longitudinal data. Both approaches have been used with increasing frequency in the social sciences. The objective of this article is to illustrate data augmentation (DA), a Markov chain Monte Carlo procedure that can be used to obtain parameter estimates and standard errors for LCA and LTA models. By use of DA it is possible to construct hypothesis tests concerning not only standard model parameters but also combinations of parameters, affording tremendous flexibility. DA is demonstrated with an example involving tests of ethnic differences, gender differences, and an Ethnicity x Gender interaction in the development of adolescent problem behavior. 相似文献
115.
Schaie KW Caskie GI Revell AJ Willis SL Kaszniak AW Teri L 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2005,12(3):245-277
A battery of 17 neuropsychological tests (including the CERAD battery) and 17 psychometric ability tests were administered to a sample of 499 participants of the Seattle Longitudinal study who had been given the psychometric ability tests seven and 14 years earlier. The neuropsychological tests were projected into a 5-factor psychometric ability space by means of extension analysis. The concurrent regressions of the neuropsychology tests on the psychometric ability tests were then used to estimate neuropsychology test scores from the psychometric ability tests administered in 1984, 1991 and 1998. Neuropsychologists then rated the study participants as either normal, suspect or cognitively impaired in 1998. Changes in estimated test scores were computed over seven and fourteen years. Significant odds ratios between normal and cognitively impaired groups were found for all neuropsychological tests over the proximal period and for most tests over the 14-year period. Similar findings occurred for the odds ratios between the normal and suspect groups for the most proximal 7-year changes. 相似文献
116.
This study compared postpartum women from the inner city (n = 94) and postpartum women from the urban middle class (n = 80) on values and goals for themselves and their newborn children. Terminal values of inner-city women for themselves related more to social and religious goals in contrast to the more intrapersonal and personal goals of middle-class women. Instrumental values of inner-city women for their newborn children demonstrated concern with conformity and control, whereas for the middle class there was more concern with competence. Goals for the near future of the inner-city mothers were based on a desire for jobs and education. 相似文献
117.
Brakel LA 《American journal of psychoanalysis》2004,64(3):267-277
The terms ego constriction, ego inhibition, and ego restriction have not been clearly differentiated in their usage in the literature. In this paper a rationale for "ego constriction" as an entity distinct from both ego inhibition and ego restriction is given, despite its clear similarities to each. In a person with an ego inhibition, the ego inhibits a part of its own functioning because a particular function is linked to an unacceptable impulse. It is an internalized conflict. The person with an ego restriction, in contrast, avoids psychological pain triggered from an area in the outside world by restricting activity in that area. Like each of these problems but different, a person with an ego constriction first externalizes an internalized conflict associated with important functions or activities. Then, only through a series of particular obligatory steps can the person "overcome" the ego constriction--albeit temporarily. It is noted in this paper that the function of the specified obligatory steps is structurally parallel to the rigid obligatory behavior necessary for genital gratification in the perversions. As the recognition of this distinction arose in the course of an analysis of a mental health professional, something of the necessarily shared nature of analytic work is noticeable, shining through as the background for the work of this paper. 相似文献
118.
The problem of recognizing phonological variations in the speech input has triggered numerous treatments in speech processing models. Two areas of current controversy are the possibility of phonological underspecification in the mental lexicon and the nature of the mapping mechanism from the speech signal to the abstract lexical entry. We present data from cross-modal repetition priming experiments in English designed to test the differing predictions of speech recognition models regarding tolerance of phonological mismatch in speech. The results show effects of underspecification, supporting models using underspecified lexical entries (e.g. Lahiri & Marslen-Wilson, 1991; Reetz & Lahiri, 2001) over those using fully specified lexical entries (e.g., McClelland & Elman, 1986). The results also show no effects of context, thus favoring context-independent mapping, such as that in the three-way matching mechanism of the Lahiri and Reetz FUL model ( Lahiri, 1999; Reetz, 1998 and Reetz, 1999; Reetz & Lahiri, 2001) over context-dependent mapping used in phonological inference rules ( Gaskell and Marslen-Wilson, 1996 and Gaskell and Marslen-Wilson, 1998). 相似文献
119.
120.
LeBlanc LA Coates AM Daneshvar S Charlop-Christy MH Morris C Lancaster BM 《Journal of applied behavior analysis》2003,36(2):253-257
We evaluated video modeling and reinforcement for teaching perspective-taking skills to 3 children with autism using a multiple baseline design. Video modeling and reinforcement were effective; however, only 2 children were able to pass an untrained task, indicating limited generalization. The findings suggest that video modeling may be an effective technology for teaching perspective taking if researchers can continue to develop strategies for enhancing the generalization of these new skills. 相似文献