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141.
Multiple Memory Processes Following Training That a Food Is Inedible in Aplysia 总被引:1,自引:1,他引:0 下载免费PDF全文
Dina Botzer Silvia Markovich Abraham J. Susswein 《Learning & memory (Cold Spring Harbor, N.Y.)》1998,5(3):204-219
In many organisms, memory after training can be separated into a number of processes. We now report that separable memory processes are also initiated by a training procedure affecting Aplysia feeding behavior, a model system for examining the neural mechanisms underlying the regulation of a complex behavior. Four distinct memory process were identified: (1) a very short-term memory that declines within 15 min, (2) a short-term memory that persists for 0.5–1.0 hr, (3) an intermediate-term memory, observed 4 hr after training, and (4) a long-term memory that is seen only after a 12- to 24-hr delay. The four memory processes can be distinguished by the different training procedures that are required to elicit them. A single 5-min training session is sufficient to elicit the very short-term memory. However, a longer training session that continues until the animal stops responding to food is needed to elicit short-term memory. Intermediate-term memory is observed only after a spaced training procedure (three 5-min training sessions separated by 30-min intervals). A single 5-min training session that does not cause either short-term or intermediate-term memory is sufficient to induce long-term memory, indicating that short- and long-term memory are independent, parallel processes. Short- and long-term memory can also be separated by the effects of a post-training experience. Long-term, but not short-term, memory can be attenuated by cooling animals immediately after training. Cooling before the training does not affect either the training or the subsequent short- or long-term memory. 相似文献
142.
Vivian M. Weil 《Science and engineering ethics》1998,4(3):303-314
A summary of the career of a Russian engineer who practiced a century ago in western Europe, as well as in Russia, provides
an example of how ethical standards can influence practice across national boundaries. An examination of his career and his
conception of engineering, of the evolution of engineering standards and codes, and of the process of formulating codes in
particular instances explains how international standards can shape practice in an international context.
An earlier version of this paper was presented at the Engineering Foundation Conference on “Ethics for Science and Engineering
Based International Industries”, Durham, NC, USA, 14–17 September 1997. 相似文献
143.
Nicknames are powerful indicators of attitudes towards gender categories and because of their transient and optional nature, it has been argued that they are more likely to show a closer relationship to ongoing trends in the culture and society than other more fixed parts of the language E. B. Phillips (1990) [“Nicknames and Sex Role Stereotypes,” Sex Roles, Vol. 23, pp. 281–289]. This study reports on a survey of nickname usage among a group of South African adolescents from mixed socioeconomic backgrounds (approximately 25% other than white) in an attempt to explicate gender-linked trends in frequency of occurrence, usage and attitudes to such special names. It reveals that conventions regarding nickname coinage and usage are intimately connected to the gender of bearers and users, and that more males have nicknames and coin them than females; it also shows significant sex-linked differences in the linguistic sources and users of nicknames, and reveals a greater tendency for female nicknames to function as indicators of affection rather than for humorous or critical effect. It could be argued that these trends could be linked to the nurturing and nurtured role of females in society, and to the differences in social power generally between males and females. 相似文献
144.
Vivian I. Schneider Alice F. Healy David J. Steinhart 《Psychonomic bulletin & review》1996,3(3):352-356
Participants searched for target letters in a short passage held in memory. In Experiment 1, participants were divided into two groups on the basis of a retrospective report concerning the type of representation used to store the passage in memory, and in Experiment 2, participants were instructed concerning the form of memory representation to use. Only participants using a visual representation missed more targets in the wordthe than in other words. Participants instructed to form a visual representation also made fewer content-word or phrase substitutions when learning the passage than did participants instructed to form an auditory representation. These findings show that choice of memory representation is flexible and that the representation used influences what can be retrieved from memory. 相似文献
145.
John L. Bradshaw Norman C. Nettleton Lyn Wilson Vivian Burden 《Brain and language》1985,26(2):322-331
While left handers, where they do in fact appear to differ from right handers in cognitive function, have generally been found to be slightly inferior on verbal tasks, there are some reports of a sinistral superiority for nonverbal or spatial abilities. Tankle and Heilman (Brain and Language, 1982, 17, 124-132) report a sinistral superiority in (obligatory) reading of left-right mirror-reversed text. However, in an investigation which included various other forms of geometrical transformation of the written word, we find that strong familial sinistrals are either not different from or even slightly inferior to dextrals in reading most transformations, including left-right mirror reversals. 相似文献
146.
Labbrozzi D Bortoli L Bertollo M Bucci I Doria C Robazza C 《Perceptual and motor skills》2012,114(3):723-734
Age-related differences in actual and perceived physical activity were investigated in a sample of adolescent girls, also considering the relationship between physical activity and motor abilities. Self-reported physical activity was measured in 11-year-old (n=66) and 13-year-old (n=52) girls by means of the physical activity questionnaire-children form, and actual levels of activity were assessed by means of the Lifecorder uniaxial accelerometer. The Sit-and-Reach Test was employed to estimate flexibility, while lower limb strength was measured by squat jump and counter-movement jump tests. Weight and height were measured, and sex-specific age-related body mass index cutoff points were used to identify overweight and obesity. Findings showed a drop in objective vigorous physical activity in older girls, which was also reflected in the physical activity questionnaire. Contrary to expectations, no association was found between motor abilities and measured physical activity. Results highlight the need to understand the reasons why girls progressively reduce their involvement in physical activity as they get older, so as to plan interventions aimed at preventing this decline. 相似文献
147.
Vivian I. Correa Zobeida E. Bonilla Maria E. Reyes-MacPherson 《Journal of child and family studies》2011,20(1):66-77
The social support networks of 25 Puerto Rican single mothers of young children with disabilities were examined and compared
with current models of family support for children with disabilities. This study was designed to assess the support systems
of Latino single mothers in light of dominant models of family support. The Family Support Scale, the ECOMAP, and responses
to open-ended questions were employed to describe the characteristics of Puerto Rican single mothers’ support systems. Study
findings suggest that members of the children’s immediate and extended kinship system, including non-blood relatives (e.g.,
madrinas), play a strong role in the support network of the mothers interviewed. Implications for early childhood professionals who
work with Latino parents of children with disabilities are examined. 相似文献
148.
Social identification is known to have wide-reaching implications, but theorists disagree about the underlying motives. Integrating motivated identity construction theory with recent social identity research, the authors predicted which motives underlie identification with two types of groups: interpersonal networks and social categories. In a five-wave longitudinal study of social identity processes among 268 new university residents, multilevel analyses showed that motives involved in identity enactment processes--self-esteem, belonging, and efficacy--significantly predicted within-person changes in identification with flatmates (an interpersonal network group), whereas motives involved in identity definition processes--meaning, self-esteem, and distinctiveness--significantly predicted within-person changes in identification with halls of residence (an abstract social category). This article discusses implications for research into identity motives and social identity. 相似文献
149.
Adults apply ownership not only to objects but also to ideas. But do people come to apply principles of ownership to ideas because of being taught about intellectual property and copyrights? Here, we investigate whether children apply rules from physical property ownership to ideas. Studies 1a and 1b show that children (6–8 years old) determine ownership of both objects and ideas based on who first establishes possession of the object or idea. Study 2 shows that children use another principle of object ownership, control of permission—an ability to restrict others’ access to the entity in question—to determine idea ownership. In Study 3 , we replicate these findings with different idea types. In Study 4 , we determine that children will not apply ownership to every entity, demonstrating that they do not apply ownership to a common word. Taken together, these results suggest that, like adults, children as young as 6 years old apply rules from ownership not only to objects but to ideas as well. 相似文献
150.
A growing body of evidence shows that materialistic values are linked to lower well‐being. Self‐determination theory offers an explanation through the low fulfilment of the basic psychological needs for autonomy, competence, and relatedness. However, recent research suggests that frustration of these psychological needs may also play an additional role. Using structural equation modelling in adult samples from an established mass‐consumer society (UK: N = 958) and a fast‐developing new economy (Chile: N = 257) and employing more comprehensive measures to tap into a materialistic orientation than used in previous studies, we found that a materialistic value orientation related negatively to well‐being and positively to ill‐being and that both psychological need satisfaction and psychological need frustration played an explanatory role herein. The model was found to be highly equivalent across both samples, supporting the cross‐cultural generality of the mechanisms involved. Copyright © 2014 European Association of Personality Psychology 相似文献