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91.
To examine the relation of mathematical background and initial attitudes toward statistics of Spanish college students in social sciences the Survey of Attitudes Toward Statistics was given to 827 students. Multivariate analyses tested the effects of two indicators of mathematical background (amount of exposure and achievement in previous courses) on the four subscales. Analysis suggested grades in previous courses are more related to initial attitudes toward statistics than the number of mathematics courses taken. Mathematical background was related with students' affective responses to statistics but not with their valuing of statistics. Implications of possible research are discussed. 相似文献
92.
Deborah A. Krusch Rafael Klorman Joan T. Brumaghim Patricia A. Fitzpatrick Agneta D. Borgstedt Jaine Strauss 《Journal of abnormal child psychology》1996,24(5):633-650
A Sternberg memory search task was administered under placebo and methylphenidate to 42 children with cross-situational attention deficit disorder (ADD), 31 children with cross-situational ADD plus oppositional features, and 25 patients with marginal ADD. Overall, stimulant medication enhanced accuracy and speed. In addition, patients reacted faster on correct responses not preceded by an error than on errors (especially false alarms) or on correct responses following an error. The slowness during error reactions may reflect decreased confidence or confusion during stimulus classification. This uncertainty may also lead subjects to respond with greater caution, hence more slowly, on correct responses following errors. Notably, methylphenidate increased the slowing of reactions on error trials as well as on correct reactions following an error. Stimulant medication may augment subjects' persistence when they are uncertain or confused, thereby heightening caution and promoting accuracy on succeeding trials. Consistent with previous reports of the generality of enhancement of performance by stimulant medication, the impact of methylphenidate was comparable for the three subtypes of ADD studied.Jaine Strauss is at Macalester College.This research was supported by National Institute of Mental Health Grants MH32103 and MH38118. We thank Rachel Avery, Christine Carriuolo, Lawrence Ota, the late Helen Pollock, and the University of Rochester's Strong Memorial Hospital Pharmacy for their assistance. 相似文献
93.
Many proposals from the analysis of social networks focused on the study of scientific collaboration have been made recently. The Small Worlds theory seems to be the most efficient to study the inner features of the scientific community. Those researches have demonstrated that small communities are based on some key individuals who connect some groups which, on the contrary, would be disconnected. One of the disadvantages from the perspective of the analysis of networks is the lack of researches of particular nodes. With the implementation of a pseudocode algorithm of Floyd, we try to avoid this. To study how a small community is formed and, as a research of one case, we observe the invisible college which is formed when connecting the fifteen most productive authors of the Journal of Personality and Social Psychology . 相似文献
94.
M. Eduarda Duarte M.C. Soares S. Fraga M. Rafael M.R. Lima I. Paredes R. Agostinho A. Djaló 《Journal of Vocational Behavior》2012,80(3):725-729
The Career-Adaptabilities Scale (CAAS)–Portugal Form consists of four scales, each with seven items, which measure concern, control, curiosity, and confidence as psychosocial resources for managing occupational transitions, developmental tasks, and work traumas. Internal consistency estimates for the subscale and total scores ranged from good to excellent. The factor structure was fairly similar to the one computed for combined data from 13 countries. The CAAS–Portugal Form includes all the items in the International Form, and it adds one further national item to each scale. The syntheses of a variety of differential studies are presented to illustrate the importance of an adaptability measure to the field of career construction. 相似文献
95.
Diaz del Campo DG Gonzalez Villora S Garcia Lopez LM Mitchell S 《Perceptual and motor skills》2011,112(3):871-888
This cross-sectional study investigated the differences between young expert soccer players' (n = 55) and novice players' (n = 74) decision-making ability during performance of invasion games (ages: 7-8, 9-10, 11-12, and 13-14 years). Decision-making ability was assessed in invasion games that were appropriately modified for age and expertise. Games were modified to meet the developmental needs and previous learning of the participants, so interference between motor execution and decision making was minimized. Game performance was videotaped, and measures of cognitive components were developed from observational analysis. Decision making was measured at two levels: (a) decision making restricted to the selection of the technical-tactical skills (passing, moving with the ball, getting free, marking, tackling, double teaming, and interception) and (b) decision making in the adaptation to the tactical context of the game. Expert players remained superior in decision-making ability when variation in skill execution was controlled. Decision-making differences between levels of expertise decreased with age with regard to the first level (skill selection) and increased with age in relation to the second level (tactical-context adaptation). Findings are discussed in terms of implications for instructional focus and task design. 相似文献
96.
Lovatel GA Bertoldi K Elsner VR Vanzella C Moysés Fdos S Spindler C Funck VR Pereira LM de Oliveira CV Oliveira MS Netto CA Siqueira IR 《Neurobiology of learning and memory》2012,98(2):182-187
Exercise induces brain function adaptations and improves learning and memory; however the time window of exercise effects has been poorly investigated. Studies demonstrate an important role for cyclooxygenase-2 (COX-2) pathway function in the mechanisms underlying memory formation. The aim of present work was to investigate the effects of treadmill exercise on aversive memory and COX-2, PGE(2) and E-prostanoid receptors contents in the rat hippocampus at different time points after exercise has ended. Adult male Wistar rats were assigned to non-exercised (sedentary) and exercised (running daily for 20min, for 2weeks) groups. The inhibitory avoidance task was used to assess aversive memory and the COX-2, PGE(2) and E-prostanoid receptors (EP1, EP2, EP3 and EP4) levels were determined 1h, 18h, 3days or 7days after the last training session of treadmill exercise. The step down latency in the inhibitory avoidance, COX-2 and EP4 receptors levels were acutely increased by exercise, with a significant positive correlation between aversive memory performance and COX-2 levels. Increased EP2 content decreased PGE(2) levels were observed 7days after the last running session. The treadmill exercise protocol facilitates inhibitory avoidance memory and induces time-dependent changes on COX-2 pathways function (COX-2, PGE(2) and EP receptors). 相似文献
97.
Unintended pregnancy among women in the 18-30 age group is a public health concern. The Extended Parallel Process Model (EPPM) provides a framework for exploring how women's perceptions of threat, efficacy, and fear influence intentions to use contraceptives. Past use and communication with best friends and partners were also considered. A telephone survey of 18-30-year-old women (N = 599) was completed. After univariate and bivariate analyses were conducted, the variables were entered into a hierarchal, multi-variate linear regression with three steps consistent with the EPPM to predict behavioral intention. The first step included the demographic variables of relationship status and income. The constructs for the EPPM were entered into step 2. Step 3 contained the fear measure. The model for the third step was significant, F(10,471) = 36.40, p < 0.001 and the variance explained by this complete model was 0.42. Results suggest that perceived severity of the consequences of an unintended pregnancy (p < 0.01), communication with friends (p < 0.01) and last sexual partner (p < 0.05), relationship status (p < 0.01), and past use (p < 0.001) were associated with women's intentions to use contraceptives. A woman's perception of the severity was related to her intention to use contraceptives. Half of the women (50.3%) reported ambivalence about the severity of an unintended pregnancy. In our study, talking with their last sexual partner had a positive effect on intentions to use contraceptives, while talking with friends influenced intentions in a negative direction. These results reconfirm the need for public health practitioners and health care providers to consider level of ambivalence toward unintended pregnancy, communication with partner, and relationship status when trying to improve women's contraceptive behaviors. Implications for effective communication interventions are discussed. 相似文献
98.
99.
Agatha Lenartowicz Rafael Escobedo-Quiroz Jonathan D. Cohen 《Cognitive, affective & behavioral neuroscience》2010,10(2):298-315
Flexible control of behavior depends on the representation, maintenance, and updating of context information in working memory,
which is thought to rely on the prefrontal cortex (PFC). However, in contrast to maintenance, the dynamics of context activation
and updating have not been well studied. To identify neural signals associated with context updating, we compared event-related
potentials associated with cues that did or did not provide task-relevant context information. The earliest effect of context
was detected 200 msec following cue onset and had a scalp topography consistent with a generator in the PFC. Subsequent effects
of context were detected at 400-700 msec following cue onset (P3b), with a broad scalp distribution spanning posterior areas,
and during the final 300 msec preceding the target, with a probable generator in the medial frontal cortex. We propose that
the effect of context on P2 is consistent with the onset of context updating in the PFC. Subsequent components may be indicative
of activation of task-relevant posterior regions and context maintenance. 相似文献
100.
Abstract A survey of the literature concerning the relationship between style of anger expression and health disorders does not lead to a clear-cut conclusion. Some studies suggest that the outward expression of anger (anger-out) contributes to health problems of various types, while others present evidence suggesting that it is the suppression of anger (anger-in) which contributes to health problems. The present study examined three conceivable explanations for the contradictory evidence produced in this research area: (1) different aspects of anger expression are differentially related to the individual's health; (2) the pattern of anger expression is related differentially to health disorders of different types; (3) the degree of matching between the individual's style of anger expression and social desirability accounts for the inconsistency in the empirical findings. A sample of 134 men underwent comprehensive medical examinations and also filled in several anger expression questionnaires. The results supported the first hypothesis, namely that intensity of anger expression was negatively correlated with ill health while frequency of anger expression was positively correlated with ill health. No support was found for the hypothesis that anger expression relates differentially to health disorders of different types. However, the matching hypothesis was confirmed in part. It was found that individuals low on both intensity of anger expression and social desirability reported the highest frequency of health problems. The theoretical significance of these findings and their practical implications are discussed. 相似文献