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51.
Official science and technology statistics arefifty years old. Among industrial countries,the forerunners were the United States, Canadaand Great Britain. This paper traces thedevelopment and the construction of S&Tstatistics in these three countries, and theirsubsequent standardization, mainly by theOECD, in the 1960s. It shows how military andscience policy needs drove the construction ofstatistics, until economic considerations cameto dominate their development. It alsodiscusses how statistics interacted withpolitics by way of studies that documentedgaps between OECD Member countries and betweenthe OECD and the USSR. 相似文献
52.
Rats trained in one context to use stimuli arising from food deprivation as discriminative signals for shock were tested in other contexts to assess the basis of conditioned responding (i.e., freezing or behavioral immobility). In Experiment 1, discriminative control by 24-h food-deprivation cues failed to promote transfer responding in a test context that had no association with shock. This indicated that food deprivation cues had little direct excitatory power. However, transfer of behavioral control by 24-h food-deprivation cues was obtained in a context paired with shock only when the rats were 19 h water deprived. This finding agrees with the idea that food-deprivation cues become conditioned modulators of the capacity of external stimuli to activate their association with an unconditioned stimulus. In Experiment 2, rats trained to use 24-h food-deprivation cues as signals for shock exhibited significantly greater transfer performance when the transfer context had undergone partial extinction relative to when the transfer context had undergone only simple excitatory training. This finding with deprivation cues and transfer contexts (1) paralleled earlier results obtained with discrete (auditory and visual) conditioned modulators and transfer targets, and (2) posed difficulties for associative summation and generalization interpretations of transfer performance. 相似文献
53.
Mikkola J Vesterinen V Taipale R Capostagno B Häkkinen K Nummela A 《Journal of sports sciences》2011,29(13):1359-1371
The purpose of this study was to assess the effects of heavy resistance, explosive resistance, and muscle endurance training on neuromuscular, endurance, and high-intensity running performance in recreational endurance runners. Twenty-seven male runners were divided into one of three groups: heavy resistance, explosive resistance or muscle endurance training. After 6 weeks of preparatory training, the groups underwent an 8-week resistance training programme as a supplement to endurance training. Before and after the 8-week training period, maximal strength (one-repetition maximum), electromyographic activity of the leg extensors, countermovement jump height, maximal speed in the maximal anaerobic running test, maximal endurance performance, maximal oxygen uptake ([V·]O(?max)), and running economy were assessed. Maximal strength improved in the heavy (P = 0.034, effect size ES = 0.38) and explosive resistance training groups (P = 0.003, ES = 0.67) with increases in leg muscle activation (heavy: P = 0.032, ES = 0.38; explosive: P = 0.002, ES = 0.77). Only the heavy resistance training group improved maximal running speed in the maximal anaerobic running test (P = 0.012, ES = 0.52) and jump height (P = 0.006, ES = 0.59). Maximal endurance running performance was improved in all groups (heavy: P = 0.005, ES = 0.56; explosive: P = 0.034, ES = 0.39; muscle endurance: P = 0.001, ES = 0.94), with small though not statistically significant improvements in [V·]O(?max) (heavy: ES = 0.08; explosive: ES = 0.29; muscle endurance: ES = 0.65) and running economy (ES in all groups < 0.08). All three modes of strength training used concurrently with endurance training were effective in improving treadmill running endurance performance. However, both heavy and explosive strength training were beneficial in improving neuromuscular characteristics, and heavy resistance training in particular contributed to improvements in high-intensity running characteristics. Thus, endurance runners should include heavy resistance training in their training programmes to enhance endurance performance, such as improving sprinting ability at the end of a race. 相似文献
54.
William L. Benoit 《Communication Studies》2013,64(3):274-295
This study applied the Functional Theory of Political Campaign Discourse to 118 political advertisements (television spots, newspaper ads, direct mail, and WWW pages) from 1998. Acclaims (self‐praise; positive statements) were the most common function (84%), followed by attacks (criticism, negative statements; 15%). Defenses (refutation of attacks) were relatively infrequent (1%). There were some differences by medium (WWW pages had the most acclaims, while television spots had the most attacks; no defenses occurred on WWW pages or in direct mail) but these functions are consistent both across media and with prior research on presidential campaign advertising. Incumbents produced more acclaims than challengers, who attacked more than incumbents. Finally, policy utterances were more common than character utterances in all media but www pages. The overall consistency in Junctions and topics across media and across levels of campaigns (presidential and non‐presidential) strongly suggests the existence of important situational influences on political campaign advertising. These findings can be useful for practitioners, theorists, and critics of campaign discourse. 相似文献
55.
Do presidential candidates adapt their spot messages to the public's interests? This study conducts a computer content analysis of the texts of presidential television spots from 1952–2000. Public opinion poll data on the most important issues for voters, in each campaign, are used to structure the searches. The extent to which candidate spot messages conform to the public issue agenda is determined. Democrats’ and challengers’ spot messages are significantly more aligned with the public policy priorities than Republicans or incumbents. There is no significant difference between the correlations for winners versus losers. Finally, in 5 of the 13 elections there is a significant relationship between the issues covered by the two candidates. Clearly, some candidates are better at adapting their television messages to voters and in some elections the candidates tend to discuss the same policy issues. 相似文献
56.
Subjects interacted with a confederate in video taped dyads and were later asked to: (a) recognize whether certain specific communication behaviors had occurred during the conversation and (b) estimate the frequency with which certain behaviors occurred in it. Subjects consulted memory for conversational behavior more than they relied upon implicit theories to provide verbal reports. Subjects were better at recognizing the gist of a remark than its verbatim content. As Ericsson and Simon's theory predicts, subjects were better able to recognize verbal than nonverbal behaviors (when elicited in verbal form) and were better able to recognize specific behaviors than to generate frequency counts. Subjects were better at recognizing their own than other's behavior. 相似文献
57.
William A. Benoit 《Communication Research Reports》2013,30(1):39-48
This study investigates televised spots by Clinton and Dole in 1996. It extends Burke's concept of identification (positive messages) to include attempts to create division (attacks), and explores the rhetorical and textual bases of these appeals. Burke's concept of identification, as operationalized here, permits insights into the nature of these spots that cannot be obtained from traditional analyses of advertisements. Surprisingly for political discourse, neither candidate used explicit identification. The incumbent Clinton used more identification than challenger Dole, who used more division. Clinton attempted to use policy more than Dole, whereas Dole focused more on character. Both campaigns attempted to identify and divide through association with groups and individuals. 相似文献
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59.
Christelle Devos Gentiane Boudrenghien Nicolas Van der Linden Assaad Azzi Mariane Frenay Benoit Galand Olivier Klein 《European Journal of Psychology of Education - EJPE》2017,32(1):61-77
A central trend in qualitative studies investigating doctoral students’ dropout is to stress the importance of students’ integration and socialisation in their working environment. Yet, few of these studies actually compared the experiences of doctoral students who completed or quit their PhD. In order to overcome this limitation and identify the factors that differentiate these two groups, the present study interviewed 21 former doctoral students: 8 completers and 13 non-completers. The results show that what best differentiates these two groups of participants is the extent to which they feel that they are moving forward, without experiencing too much distress, on a research project that makes sense to them. We assume that this set of factors is central in the dropout process. Support from doctoral peers was found to play a positive role overall but did not contribute to differentiating the two groups, presumably because peers have a limited impact on dissertation progress. Supervisors’ support was central to the participants’ stories; it is thus assumed to play a role in the process, but this role is complex and needs further investigation. These results call for a stronger consideration of the doctoral task itself when investigating the process of persistence and attrition and for a more integrated framework that considers jointly both task- and environment-related aspects. 相似文献
60.
Ariane S. Etienne Sylvie Joris Lambert Benoit Reverdin Evelyne Teroni 《Learning & behavior》1993,21(3):266-280
In Experiment 1, hamsters started from their permanent home at the periphery of a circular arena and headed to a food source at the center. They then returned, fully laden with food, along a direct path to their home. On control trials, in which no manipulation takes place, visual cues outside the arena and dead reckoning (i.e., updated internal references generated during the outward journey to the food source) controlled the return journey. On experimental trials, the arena, with the hamster in its nest, was rotated by 90°, putting dead reckoning at variance with the distal visual environment. The animals were rewarded for going with dead reckoning. At first, they favored the distal cues, but later most of the subjects switched to using dead reckoning. Thus, hamsters are flexible enough to recalibrate the relative weight that they normally attribute to different sets of spatial cues. In Experiment 2, the reliance on dead-reckoning was greatly enhanced when a cue card at the nest entrance was rotated along with the arena, pitting one proximal cue plus dead reckoning against distal cues. Hence, dead reckoning and external cues seem to reinforce each other through their mutual correlation. 相似文献