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111.
112.
Performance variability across repeated task administrations may be an important indicator of age-related cognitive functioning. In the present investigation, the authors examined whether age differences and change in inconsistency were related to 6-year (3 occasion) cognitive change. Inconsistency scores were computed from 4 reaction time tasks performed by 446 older adults (54-89 years). Replicating previous cross-sectional results, greater inconsistency was observed for older participants even after controlling for differences in response speed. New longitudinal results demonstrated (a) associations between inconsistency at baseline measurement and 6-year change in cognitive performance; (b) longitudinal change in inconsistency; and (c) intraindividual covariation between 6-year change in inconsistency and 6-year change in level of cognitive function. These findings support the view that performance variability serves as a marker of cognitive aging. 相似文献
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114.
In six experiments we demonstrate that the vertical-horizontal illusion that is evoked when viewing photographs and line drawings is relatively small, whereas the magnitude of this illusion when large objects are viewed is at least twice as great. Furthermore, we show that the illusion is due more to vertical overestimation than horizontal underestimation. The lack of a difference in vertical overestimation between pictures and line drawings suggests that vertical overestimation in pictures depends solely on the perceived physical size of the projection on the picture surface, rather than on what is apparent about an object's represented size. The vertical-horizontal illusion is influenced by perceived physical size. It is greater when viewing large objects than small pictures of these same objects, even when visual angles are equated. 相似文献
115.
Rehfeldt Ruth Anne Dixon Mark R. Hayes Linda J. Steele Amy 《The Psychological record》1998,48(4):647-664
The Psychological Record - The purpose of this experiment was to examine the blocking effect within the context of a stimulus equivalence paradigm. Ten subjects were provided with a prior history... 相似文献
116.
Peter Dixon 《Psychonomic bulletin & review》1998,5(3):390-396
According to almost any approach to statistical inference, attained significance levels, orp values, have little value. Despite this consensus among statistical experts,p values are usually reported extensively in research articles in a manner that invites misinterpretation. In the present article, I suggest that the reasonp values are so heavily used is because they provide information concerning the strength of the evidence provided by the experiment. In some typical hypothesis testing situations, researchers may be interested in the relative adequacy of two different theoretical accounts: one that predicts no difference across conditions, and another that predicts some difference. The appropriate statistic for this kind of comparison is the likelihood ratio,P(D|M 0)/P(D|M 1), whereM 0 andM 1 are the two theoretical accounts. Large values of the likelihood ratio provide evidence thatM 0 is a better account, whereas small values indicate thatM1 is better. I demonstrate that, under some circumstances, thep value can be interpreted in the same manner as the likelihood ratio. In particular, forZ,t, and sign tests, the likelihood ratio is an approximately linear function of thep value, with a slope between 2 and 3. Thus, researchers may reportp values in scientific communications because they are a proxy for the likelihood ratio and provide the readers with information about the strength of the evidence that is not otherwise available. 相似文献
117.
Vincent Di Lollo John H. Hogben Peter Dixon 《Attention, perception & psychophysics》1994,55(4):373-386
Two brief sequential displays separated by a brief interstimulus interval (ISI) are often perceived as a temporally integrated unitary configuration. The probability of temporal integration can be decreased by increasing the ISI or (counterintuitively) by increasing stimulus duration. We tested three hypotheses of the relative contributions of stimulus duration and ISI to the breakdown of temporal integration (the storage, processing, and temporal correlation hypotheses). In the first of two experiments, stimulus duration and ISI were varied factorially, and estimates of temporal integration were obtained with a form-part integration task. The second experiment was a replication of the first at two levels of stimulus intensity. The outcomes were inconsistent with the storage and processing options, but confirmed predictions from the temporal correlation hypothesis. Whether two sequential stimuli are perceived as temporally integrated or disjoint depends not on the availability of visible persistence, but on the emergence of a neural code that is based on the temporal correlation between the two visual responses. 相似文献
118.
Peter Dixon 《Memory & cognition》1978,6(4):454-461
The relative lengths of two rows of objects systematically affected the time to make judgments of the relative number of objects. The time to decide which row contained more objects generally increased with the amount of incongruity between length and number (e.g., reaction time was long when the numerically larger row was the shorter of the two). In addition, the time to decide that the rows contained an equal number of objects increased with the disparity in length between the rows. These results suggest that length information was used in the numerical comparison process. A model that uses an internal transformation of row length is proposed to account for the results. 相似文献
119.
Control is theorized as central to intimate partner aggression (IPA). Tools measuring nonphysical “controlling behaviors” in relationships have therefore been developed to identify the latent construct of control. However, the underlying assumption that “controlling behaviors” form a distinct subset of IPA has not been validated. This study investigates the divergent validity of acts considered as “controlling behaviors” against other aggressive acts used in relationships. The IPA and relationship literatures were reviewed to identify 1,397 items involving “controlling,” physical, sexual, and psychologically aggressive acts perpetrated and/or experienced by an intimate partner. In total, 101 item pairs were identified and used to measure IPA tactics across these categories. In Study 1, exploratory factor analysis in a community sample (N = 561) found no evidence of a distinct factor of “controlling behaviors.” Behaviors labeled as “controlling” in existing measures were distributed across other factors, including “eclectic aggression,” “direct psychological aggression,” and “monitoring acts.” In Study 2A (N = 424 students), confirmatory factor analysis replicated the results of Study 1 and established configural measurement invariance (Study 2B), indicating no evidence for psychometric differences between samples. These results indicate that behaviors described as “controlling” in existing measures were not statistically distinguishable from other forms of IPA, and suggest that future research should investigate motivational, rather than behavioral, differences in the use of IPA. The findings challenge research to confirm whether a set of discrete behaviors can be used to accurately identify control in relationships and question the validity of tools that adopt this methodology. 相似文献
120.
Jordan Belisle Caleb R. Stanley Ayla Schmick Mark R. Dixon Amani Alholail Megan E. Galliford Lindsey Ellenberger 《Journal of applied behavior analysis》2020,53(2):938-955
Relational Frame Theory posits that complex language develops through arbitrarily applicable relational networks, with potential implications for individuals with autism. Responding relationally based on comparison occurs when participants respond to any number of comparative properties, such as “bigger” or “faster.” Experiment 1 established two 3-member comparative networks, in which a stimulus A was conditioned as “bigger” or “faster” than a stimulus B, and the stimulus B was conditioned as “bigger” or “faster” than a stimulus C in 2 children with autism. Both participants met the mastery criterion for the trained relations and demonstrated the emergence of the untrained combinatorially entailed A–C and C–A relations. The participants could also match the arbitrary A stimuli with larger or faster objects and the C stimuli with smaller or slower objects. The results were replicated in Experiment 2 with the same participants, where a 5-member relational network was established for the bigger/smaller relation. 相似文献