全文获取类型
收费全文 | 1976篇 |
免费 | 133篇 |
国内免费 | 1篇 |
出版年
2021年 | 32篇 |
2020年 | 42篇 |
2019年 | 46篇 |
2018年 | 67篇 |
2017年 | 84篇 |
2016年 | 76篇 |
2015年 | 56篇 |
2014年 | 76篇 |
2013年 | 215篇 |
2012年 | 93篇 |
2011年 | 98篇 |
2010年 | 67篇 |
2009年 | 63篇 |
2008年 | 80篇 |
2007年 | 66篇 |
2006年 | 54篇 |
2005年 | 65篇 |
2004年 | 56篇 |
2003年 | 39篇 |
2002年 | 64篇 |
2001年 | 31篇 |
2000年 | 35篇 |
1999年 | 26篇 |
1998年 | 18篇 |
1997年 | 17篇 |
1996年 | 15篇 |
1995年 | 15篇 |
1994年 | 16篇 |
1993年 | 15篇 |
1992年 | 22篇 |
1991年 | 16篇 |
1990年 | 15篇 |
1989年 | 19篇 |
1988年 | 16篇 |
1987年 | 16篇 |
1985年 | 24篇 |
1984年 | 23篇 |
1983年 | 15篇 |
1981年 | 18篇 |
1980年 | 19篇 |
1979年 | 16篇 |
1978年 | 17篇 |
1977年 | 22篇 |
1976年 | 17篇 |
1975年 | 21篇 |
1973年 | 16篇 |
1971年 | 13篇 |
1970年 | 13篇 |
1968年 | 18篇 |
1967年 | 18篇 |
排序方式: 共有2110条查询结果,搜索用时 15 毫秒
51.
Vocational research has focused on the occupational choice process and the individual's adjustment to work. Very little research has examined the job search process in which the individual must engage in order to implement occupational choices. This study examines one dimension of the job search process: the relationship between job source and subsequent work experiences. The data reveal that when the respondents initially entered the labor market, those relying on formal job sources tended to work in higher-level occupations and in jobs more closely related to their training than their counterparts who used other job sources. In the longer run, the labor market advantages associated with the use of formal job sources dissipated for the engineering majors but tended to persist for the business alumni. 相似文献
52.
Ben Fletcher 《Attention, perception & psychophysics》1981,30(4):347-352
The Hatfield Polytechnic, Hatfield, Herts ALIO 9AB, England The experiment utilized a serial choice reaction time (RT) paradigm in which only one alphanumeric stimulus was presented per trial, and the target set consisted of a single identified item. The categorical relationship between the target and nontarget items was varied as a property of blocks of trials. Target and nontarget RTs were smaller when the specified target item (e.g., the number 6) was categorically distinct from the nontargets (e.g., letters) than when it was from the same category (e.g., digits). The processing of catch-trial stimuli (items from the alternate category to the nontargets) and homographie category-ambiguous items was inhibited only in the former, between-category, condition. The results are contrasted with those obtained in visual search tasks. They suggest that a “locational-cue” explanation of alphanumeric category effects is inadequate. 相似文献
53.
A single-subject experimental design was used to investigate the feasibility of applying non-invasive laboratory instrumentation for examining speech physiology to assessment and biofeedback-based remediation of stuttering. Physiologic assessment facilitated the development of behavioral goals directed at changing respiratory and phonatory behaviors for this subject. Visual biofeedback therapy produced reduction in respiratory discontinuities and increased phonatory continuity, concomitant with reduced perceivable molar dysfluency. Methods used in this case illustrate a variety of options and problems related to clinical use of instrumentation. Results suggest that signals which represent respiratory, phonatory, and articulatory physiologic events may be clinically practical for evaluating and altering perceivable dysfluency. 相似文献
54.
Older and young adults' letter detection and lexical decision performance were examined as word frequency varied to determine whether there were age differences in word recognition. Allen and Madden (1989) found that older adults' pattern of reaction time (RT) across word frequency categories was different from young adults' pattern for a letter detection task. In this study, for both letter detection and lexical decision tasks, older adults exhibited a monotonically decreasing RT function as word frequency increased. However, young adults exhibited a nonmonotonic RT function across word frequency for the letter detection task but a monotonically decreasing RT function as word frequency increased for the lexical decision task. An expanded parallel input serial analysis model of word processing was hypothesized. 相似文献
55.
Mark D. Rapport H. Allen Murphy Jon S. Bailey 《Journal of applied behavior analysis》1982,15(2):205-216
A within-subject comparison was made of the effects of methylphenidate (Ritalin) and response cost in reducing the off-task behavior of two boys, 7 and 8 years of age, who had been diagnosed as having an attentional deficit disorder with hyperactivity. Several dosages of Ritalin (5 to 20 mg/day) were evaluated with the results indicating varying effects of the drug for both children. Response cost (with free-time as the reinforcer) was superior to Ritalin in raising levels of on-task behavior and in improving academic performance. 相似文献
56.
Subjects were tested on cross-and within-modality matching conditions with either a 5-sec or a 20-sec delay imposed between standard and comparison stimuli. Half the subjects were informed before the trial of what the comparison modality would be, while the others were not. There was a strong effect of instructions on the cross-modality conditions, but little on the within-modality conditions. The informed subjects showed better performance in the haptic-visual condition, while for the uninformed subjects, visual-haptic performance was better. The results suggest the importance of subjects’ processing strategies in cross-modality performance. 相似文献
57.
College student subjects estimated the duration of time intervals (8–54 sec) by counting or not (N=35 per group). Counting eliminated the repetition effect (a decline in the magnitude of estimations across trials), and resulted in a truncation of the psychophysical function. The former result was interpreted as contrary to Treisman's (1963) model. The latter result was attributed to the effortfulness of counting, which was established in a subsequent experiment. 相似文献
58.
59.
Allen R. Wyler 《Integrative psychological & behavioral science》1977,12(3):130-146
This paper reviews a series of previous reports which summarize the physiology of chronic experimental epileptic foci in monkeys. It is shown that such monkeys can be trained to bidirectionally control the firing rates of normal and epileptic neurons which comprise the epileptic focus. As a result of this acquired operant performance, the monkeys show both a decrease in clinical seizures as well as a decrease in single unit epileptic activity. The EEC correlate of this change in single unit epileptic actvity is generalized EEG desynchronization. The conclusion from these data would indicate epileptic neurons can be operantly controlled and this control is not correlated with any specific EEG pattern. This brings to question the specificity of the SMR in EEG biofeedback paradigms which treat human epilepsy. This author feels that the result from such biofeedback studies are the result of the patient learning to manipulate electrical events within the CNS pathways through which the seizure propagates and is not contingent upon specific EEG frequencies. 相似文献
60.