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In the present study, we examined the joint effects of aging, repetition, and response deadline in a plurality discrimination task. Young and older adults studied lists of unrelated singular and plural nouns, with half presented once (weak items) and half presented five times (strong items). Test lists contained old (same) nouns, plurality-reversed nouns (changed lures), and unstudied nouns (new lures), and the participants were asked to respond old only to same items. In Experiment 1, the participants were tested with both short and long deadlines. In Experiment 2, the tests were unpaced. In both experiments, repetition increased hit rates for young and older adults. Young adults tested with a long deadline or no deadline showed invariant (Experiment 1) or reduced (Experiment 2) false alarms to changed lures when the nouns were studied more often. Young adults tested with a short deadline and older adults tested with both long and short deadlines had increased false alarm rates for strong changed lures; without time pressure to respond, older adults did not have a significant increase in false alarms for changed lures. Implications of these results for theories of cognitive aging are explored. 相似文献
113.
Topoi - What understanding of mathematical objectivity is promoted by Peirce’s pragmatism? Can Peirce’s theory help us to further comprehend the role of intersubjectivity in... 相似文献
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Genetic counseling for the next 25 years: Models for the future 总被引:1,自引:0,他引:1
Currently, two trends pose particular challenges for genetic counseling: (1) spin offs from the Human Genome Project leading to new diagnostic genetic tests far in advance of any cures; and (2) an increasing and diversified client population. These trends will lead to changes in both genetic service delivery systems and the development of alternative models of the genetic counseling process itself. Two models that could be adapted for genetic counseling are: the mutual participation model and the life history narrative model. Technological advances present ethical dilemmas and raise many questions. Already, improved detection of genes for predisposing conditions has entered clinical medicine requiring renewed ethical appraisals of genetic testing. Integration of genetic counseling (and required pre-screening education) into primary care settings involves time constraints and the involvement of health care personnel with less training in genetics. Alternative approaches are beginning to be discussed. Innovative genetic counselors with expanded visions of counseling goals and practices will play an increasingly important role in the future of genetic counseling. 相似文献
116.
Regina M. Sullivan 《Integrative psychological & behavioral science》2001,36(4):293-307
The central nervous system of altricial infants is specialized for optimizing attachments to their caregiver. During the first
postnatal days, infant rats show a sensitive period for learning and particularly susceptible to learning an attraction to
their mother’s odor. Classical conditioning appears to underlie this learning that is expressed behaviorally as anincreased ability to acquire odor preferences and a decreased ability to acquire odor aversions. Specifically, in neonatal rats, pairing an odor with moderately painful shock (0.5mA) or milk produces a subsequent relativepreference for that odor. The neural circuitry supporting theincreased ability to acquire odor preferences appears to be the heightened functioning of the noradrenergic pontine nucleus locus coeruleus. Indeed, norepinephrine from
the locus coeruleus appears to be both necessary and sufficient for learning during the sensitive period. On the other hand,
thedecreased ability to acquire odor aversions seems to be due to the lack of participation of the amygdala in at least some aversive learning situations. The site of plasticity
in the pup’s brain appears to be limited to the olfactory bulb. This neonatal sensitive period for learning ends around postnatal
day 9–10, at which time pups make the transition from crawling to walking and classical conditioning becomes “adultlike”.
The neonatal behavioral and neural induced changes are retained into adulthood where it modifies sexual behavior. 相似文献
117.
Regina Hechanova 《Asian Journal of Social Psychology》2012,15(3):208-219
This mixed method study examines the impact of culture masquerading among 488 Filipino customer service representatives handling international accounts. Culture masquerading is practised via taking on foreign names, locations and nationalities. Applying social identity theory, it is hypothesized and supported that masquerading of nationality is negatively related to cultural identity. As predicted, there is a positive relationship between cultural identity and organization commitment. No support is found for the hypothesis that cultural identity mediates the relationship between culture masquerading. Situated identity theory and economic, social, and historical influences are used to explain these findings. 相似文献
118.
Prior research has reported racial/ethnic differences in the early initiation of alcohol use, suggesting that cultural values that are central to specific racial/ethnic groups may be influencing these differences. This 1-year longitudinal study examines associations between two types of cultural values, parental respect (honor for one's parents) and familism (connectedness with family), both measured at baseline, and subsequent alcohol initiation in a sample of 6,054 (approximately 49% male, 57% Hispanic, 22% Asian, 18% non-Hispanic White, and 4% non-Hispanic Black) middle school students in Southern California. We tested whether the associations of cultural values with alcohol initiation could be explained by baseline measures of alcohol resistance self-efficacy (RSE) and alcohol expectancies. We also explored whether these pathways differed by race/ethnicity. In the full sample, adolescents with higher parental respect were less likely to initiate alcohol use, an association that was partially explained by higher RSE and fewer positive alcohol expectancies. Familism was not significantly related to alcohol initiation. Comparing racial/ethnic groups, higher parental respect was protective against alcohol initiation for Whites and Asians, but not Blacks or Hispanics. There were no racial/ethnic differences in the association between familism and alcohol initiation. Results suggest that cultural values are important factors in the decision to use alcohol and these values appear to operate in part, by influencing alcohol positive expectancies and RSE. Interventions that focus on maintaining strong cultural values and building strong bonds between adolescents and their families may help reduce the risk of alcohol initiation. (PsycINFO Database Record (c) 2012 APA, all rights reserved). 相似文献
119.
The aim of this study was to examine salivary cortisol and testosterone concentrations in professional male athletes during a short triathlon competition using non-invasive methods, and to determine whether these hormone concentrations could be accurate predictors of performance. Eight adult male athletes (age, mean ± SEM: 27.8 ± 3.2 years; body mass index: 21.66 ± 0.42) in a professional triathlon team volunteered to participate in this study. Saliva samples were taken on the competition day and 7 days after competition on a rest day. The performance of the athletes was assessed by their rank order in the competition. Salivary cortisol concentrations were greater on the competition day than on the rest day in the early morning, immediately after waking up, 30 min later, immediately before the start of the competition, and later in the evening. Testosterone concentrations were greater on the competition day in the morning and in the evening. The diurnal rhythm of both cortisol and testosterone concentrations was maintained on both days and the testosterone/cortisol ratio (T/C ratio) was similar between days. The performance of the athletes was positively correlated with salivary cortisol concentration in the early morning of the competition day, but was not correlated with testosterone concentrations at any of the time points. In conclusion, early morning salivary cortisol concentration, but not T/C ratio, could be used to predict performance in athletes during a professional triathlon competition. 相似文献
120.
Korsakoff's syndrome (KS) is characterized by dense anterograde amnesia resulting from damage to the diencephalon region, typically resulting from chronic alcohol abuse and thiamine deficiency. This review assesses the integrity of the implicit memory system in KS, focusing on studies of procedural learning and priming. KS patients are impaired on several measures of procedural memory, most likely due to impairment in cognitive functions associated with alcohol-related neural damage outside of the diencephalon. The pattern of performance on tasks of implicit priming suggests reliance on a residual, non-flexible memory operating more or less in an automatic fashion. Our review concludes that whether measures of implicit memory reveal intact or impaired performance in individuals with KS depends heavily on specific task parameters and demands, including timing between stimuli, the specific nature of the stimuli used in a task, and the integrity of supportive cognitive functions necessary for performance. 相似文献