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71.
Eyewitnesses sometimes view more than one lineup during an investigation. We investigated the effects of postidentification feedback following one lineup on responses to a second lineup. Witnesses (N=621) viewed a mock crime and, later, attempted to identify the culprit from an initial (target-absent) lineup and a second (target-present or target-absent) lineup. Prior to viewing the second lineup, some witnesses received accurate feedback stating that the initial lineup did not contain the culprit. A compound-decision, signal detection approach allowed the effects of feedback on identification responses to be described in terms of differences in discriminability and response bias. For witnesses who made an incorrect foil identification from the initial lineup, feedback (vs. no feedback) was associated with poorer discriminability on the second test. For witnesses who correctly rejected the initial lineup, feedback (vs. no feedback) was associated with greater discriminability on the second test. Only witnesses who received feedback after an initial correct rejection performed at a level comparable with a single-lineup control group, suggesting that an initial identification test can impair, but not enhance, performance on a second test involving the same culprit. From a theoretical perspective, the results are consistent with the idea that the way people use memorial information when making memory decisions is flexible. Analyses of preidentification confidence ratings, obtained in a follow-up study (N=133), suggested that the effects of feedback on identification performance may have operated via differences in witnesses' metacognitive beliefs. 相似文献
72.
Peay HL Veach PM Palmer CG Rosen-Sheidley B Gettig E Austin JC 《Journal of genetic counseling》2008,17(1):6-17
This is the first article of a two-part professional development series addressing genetic counseling for personal and family
histories of psychiatric disorders. It is based on an Educational Breakout Session presented by the Psychiatric Special Interest
Group of the National Society of Genetic Counselors at the 2006 Annual Education Conference. This article examines issues
that arise in addressing family histories of psychiatric illness, while the second article in the series considers the generation
and provision of individualized recurrence risks for psychiatric disorders. In this article we discuss the importance of managing
uncertainty for affected individuals and their close family members who have been referred to genetics for a number of different
indications. We then use four simulated cases to make recommendations about the scope and timing of discussions related to
the psychiatric family history. 相似文献
73.
In the occlusion illusion, the visible portion of a partly occluded object appears larger than a physically identical nonoccluded region. Stereoscopic displays allowed for a direct test of the apparent-distance hypothesis. In Experiments 1A and 1B, we measured both the perceived size and the perceived depth of partly occluded targets when the binocular disparity of both targets and occluders was varied. Stereoscopic occlusion greatly increased perceived target size but not perceived target distance. A reduced illusion was still present when the target was stereoscopically in front of the abutting rectangle, however. Experiments 2A and 2B showed similar results, even when the occluding figures were illusory rectangles that formed no explicit T-junctions. Experiment 3 showed that an unexpected negative size illusion on control trials was primarily due to adaptation to the occlusion illusion on other trials. The present findings eliminate apparent-distance explanations of the occlusion illusion but are consistent with other hypotheses, such as partial modal completion and selective dimensional expansion. 相似文献
74.
Application of a neuropsychological perspective to the study of schizophrenia has established a number of important facts
about this disorder. Some of the key findings from the existing literature are that, while neurocognitive impairment is present
in most, if not all, persons with schizophrenia, there is both substantial interpatient heterogeneity and remarkable within-patient
stability of cognitive function over the long-term course of the illness. Such findings have contributed to the firm establishment
of neurobiologic models of schizophrenia, and thereby help to reduce the social stigma that was sometimes associated with
purely psychogenic models popular during parts of the 20th century. Neuropsychological studies in recent decades have established
the primacy of cognitive functions over psychopathologic symptoms as determinants of functional capacity and independence
in everyday functioning. Although the cognitive benefits of both conventional and even second generation antipsychotic medications
appear marginal at best, recognition of the primacy of cognitive deficits as determinants of functional disability in schizophrenia
has catalyzed recent efforts to develop targeted treatments for the cognitive deficits of this disorder. Despite these accomplishments,
however, some issues remain to be resolved. Efforts to firmly establish the specific neurocognitive/neuropathologic systems
responsible for schizophrenia remain elusive, as do efforts to definitively demonstrate the specific cognitive deficits underlying
specific forms of functional impairment. Further progress may be fostered by recent initiatives to integrate neuropsychological
studies with experimental neuroscience, perhaps leading to measures of deficits in cognitive processes more clearly associated
with specific, identifiable brain systems. 相似文献
75.
Three experiments contrasted the effects of articulatory suppression on recognition memory for musical and verbal sequences. In Experiment 1, a standard/comparison task was employed, with digit or note sequences presented visually or auditorily while participants remained silent or produced intermittent verbal suppression (saying "the") or musical suppression (singing "la"). Both suppression types decreased performance by equivalent amounts, as compared with no suppression. Recognition accuracy was lower during suppression for visually presented digits than during that for auditorily presented digits (consistent with phonological loop predictions), whereas accuracy was equivalent for visually presented notes and auditory tones. When visual interference filled the retention interval in Experiment 2, performance with visually presented notes but not digits was impaired. Experiment 3 forced participants to translate visually presented music sequences by presenting comparison sequences auditorily. Suppression effects for visually presented music resembled those for digits only when the recognition task required sensory translation of cues. 相似文献
76.
Chester I. Palmer W. R. Boyles John G. Veres III J. B. Hill 《Journal of business and psychology》1992,7(2):239-257
zWork simulation performance tests of filing and proofreading were the principal criteria in a validation study of a paper and pencil clerical selection test constructed by content-oriented methods; supervisory ratings were also used. Experiment 1 was a concurrent study using as subjects 59 provisional employees. Experiment 2 was a predictive study using as subjects 184 employees actually selected on the basis of test scores. In both studies, substantial correlations were found between scores on the selection test and performance on the work samples: Estimates of correlations in the original selection group ranged from .4 to .8. Correlations between the selection test and the supervisor ratings were significant in Experiment 1, but not in Experiment 2; even when significant, they were much lower than the correlations with the work samples. These results suggest the value of using work samples as criteria for validation studies. Implications for other validation efforts are considered. 相似文献
77.
Palmer DC 《Journal of the experimental analysis of behavior》1996,65(1):289-290
78.
79.
The growing interest in dual-inheritance models of human evolution has focused attention on culture as a means by which ancestors transmitted acquired phenotypic characteristics to their descendants. The ability of cultural behaviors to be repeatedly transmitted from ancestors to descendants enables individuals to influence their descendant-leaving success over many more generations than are usually coclusive fitness. This essay proposes that traditional stories, or myths, can be seen as a way in which ancestors influence their descendant-leaving success by influencing the behavior of many generations of their descendants. The myth of Oedipus is used as an example of a traditional story aimed at promoting proper behavior and cooperation among kin. This interpretation of the Oedipus myth is contrasted with Freudian and structuralist interpretations. 相似文献
80.
Because of limited peripheral vision, many visual tasks depend on multiple eye fixations. Good performance in such tasks demonstrates that some memory must survive from one fixation to the next. One factor that must influence performance is the degree to which multiple eye fixations interfere with the critical memories. In the present study, the amount of interference was measured by comparing visual discriminations based on multiple fixations to visual discriminations based on a single fixation. The procedure resembled partial report, but used a discrimination measure. In the prototype study, two lines were presented, followed by a single line and a cue. The cue pointed toward one of the positions of the first two lines. Observers were required to judge if the single line in the second display was longer or shorter than the cued line of the first display. These judgments were used to estimate a length threshold. The critical manipulation was to instruct observers either to maintain fixation between the lines of the first display or to fixate each line in sequence. The results showed an advantage for multiple fixations despite the intervening eye movements. In fact, thresholds for the multiple-fixation condition were nearly as good as those in a control condition where the lines were foveally viewed without eye movements. Thus, eye movements had little or no interfering effect in this task. Additional studies generalized the procedure and the stimuli. In conclusion, information about a variety of size and shape attributes was remembered with essentially no interference across eye fixations. 相似文献