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201.
By atomic-scale high-angle annular dark-field scanning transmission electron microscopy, the long-period stacking ordered (LPSO) structures in a near-equilibrium Mg97Zn1Y2 (at.%) alloy have been characterised. In addition to 18R and 14H, new polytypes of LPSO structures are analysed and determined as 60R, 78R, 26H, 96R, 38H, 40H, 108H and 246R. All of these LPSO structures feature AB′C′A building blocks with two Mg layers and three Mg layers sandwiched between them. The Bravais lattices and space groups of new polytypes of LPSO structures were easily determined via the newly introduced method. A structural relationship between the LPSOs is proposed. 相似文献
202.
203.
CATHERINE Z. ELGIN 《Midwest Studies In Philosophy》2004,28(1):226-238
204.
205.
Douglas A. Guiffrida Kathryn Z. Douthit Martin F. Lynch Karen L. Mackie 《Journal of counseling and development : JCD》2011,89(3):282-287
The increased use of action research in counseling training and professional publications provides an opportunity to bridge the research‐practitioner gap that has plagued the profession for decades. In this article, action research is defined, and special considerations that counselor researchers need to address when designing, conducting, and reporting action research are presented. Suggestions are included throughout the article to assist counseling action researchers in publishing their studies in American Counseling Association journals. 相似文献
206.
Singh T McDannald MA Takahashi YK Haney RZ Cooch NK Lucantonio F Schoenbaum G 《Learning & memory (Cold Spring Harbor, N.Y.)》2011,18(2):85-87
While knowing what to expect is important, it is equally important to know when to expect it and to respond accordingly. This is apparent even in simple Pavlovian training situations in which animals learn to respond more strongly closer to reward delivery. Here we report that the nucleus accumbens core, an area well-positioned to represent information about the timing of impending rewards, plays a critical role in this timing function. 相似文献
207.
There is accumulating evidence that a variety of species possess quantitative abilities although their cognitive substrate
is still unclear. This study is the first to investigate whether sea lions (Otaria flavescens), in the absence of training, are able to assess and select the larger of two sets of quantities. In Experiment 1, the two
sets of quantities were presented simultaneously as whole sets, that is, the subjects could compare them directly. In Experiment
2, the two sets of quantities were presented item-by-item, and the totality of items was never visually available at the time
of choice. For each type of presentation, we analysed the effect of the ratio between quantities, the difference between quantities
and the total number of items presented. The results showed that (1) sea lions can make relative quantity judgments successfully
and (2) there is a predominant influence of the ratio between quantities on the subjects’ performance. The latter supports
the idea that an analogue representational mechanism is responsible for sea lions’ relative quantities judgments. These findings
are consistent with previous reports of relative quantities judgments in other species such as monkeys and apes and suggest
that sea lions might share a similar mechanism to compare and represent quantities. 相似文献
208.
Spearman's law of diminishing returns (SLODR) posits that at higher levels of general cognitive ability the general factor (g) performs less well in explaining individual differences in cognitive test performance. Research has generally supported SLODR, but previous research has required the a priori division of respondents into separate ability or IQ groups. The present study sought to obviate this limitation through the use of factor mixture modeling to investigate SLODR in the Kaufman Assessment Battery for Children-Second Edition (KABC-II). A second-order confirmatory factor model was modeled as a within-class factor structure. The fit and parameter estimates of several models with varying number of classes and factorial invariance restrictions were compared. Given SLODR, a predictable pattern of findings should emerge when factor mixture modeling is applied. Our results were consistent with these SLODR-based predictions, most notably the g factor variance was less in higher g mean classes. Use of factor mixture modeling was found to provide support for SLODR while improving the model used to investigate SLODR. 相似文献
209.
Ruth E. Propper Lauren J. O’Donnell Stephen Whalen Yanmei Tie Isaiah H. Norton Ralph O. Suarez Lilla Zollei Alireza Radmanesh Alexandra J. Golby 《Brain and cognition》2010
The present study examined the relationship between hand preference degree and direction, functional language lateralization in Broca’s and Wernicke’s areas, and structural measures of the arcuate fasciculus. Results revealed an effect of degree of hand preference on arcuate fasciculus structure, such that consistently-handed individuals, regardless of the direction of hand preference, demonstrated the most asymmetric arcuate fasciculus, with larger left versus right arcuate, as measured by DTI. Functional language lateralization in Wernicke’s area, measured via fMRI, was related to arcuate fasciculus volume in consistent-left-handers only, and only in people who were not right hemisphere lateralized for language; given the small sample size for this finding, future investigation is warranted. Results suggest handedness degree may be an important variable to investigate in the context of neuroanatomical asymmetries. 相似文献
210.
The present study examines the short-term cognitive effects of playing a sexually explicit video game with female “objectification” content on male players. Seventy-four male students from a university in California, U.S. participated in a laboratory experiment. They were randomly assigned to play either a sexually-explicit game or one of two control games. Participants’ cognitive accessibility to sexual and sexually objectifying thoughts was measured in a lexical decision task. A likelihood-to-sexually-harass scale was also administered. Results show that playing a video game with the theme of female “objectification” may prime thoughts related to sex, encourage men to view women as sex objects, and lead to self-reported tendencies to behave inappropriately towards women in social situations. 相似文献