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101.
The role of importance and interest in the processing of text   总被引:4,自引:0,他引:4  
In this review, text-based research on importance and interest is analyzed with several objectives in mind. First, the constructs of importance and interest are unidimensionally considered to show that various forms of each can operate within any text-learning environment. Second, research specifically addressing the interplay between these two factors is explored in relation to the goal of learning from text. The purpose of this analysis is to evaluate the research on importance and interest from a methodological standpoint and to delineate key findings that emerge from this body of research. Finally, based on the review of the literature, implications for future research and instructional practice are presented.  相似文献   
102.
Example-based learning is a very effective and efficient instructional strategy for novices. It can be implemented using text-based worked examples that provide a written demonstration of how to perform a task, or (video) modelling examples in which an instructor (the ‘model’) provides a demonstration. The model-observer similarity (MOS) hypothesis predicts that the effectiveness of modelling examples partly depends on the degree to which learners perceive the models to be similar to them. It is an open question, however, whether perceived similarity with the person who created the example, would also affect learning from text-based worked examples. Therefore, two experiments were conducted to investigate whether MOS would also play a role in learning from worked examples. In Experiment 1 (N = 147), students were led to believe via pictures and a short story that the worked examples were created by a male or female peer student. Males showed higher performance and confidence, but no effects of MOS on learning were found. In Experiment 2 (N = 130), students were led to believe that a peer student or a teacher created the examples. Again, no effects of MOS were found. These findings suggest that the perceived origin of text-based worked examples is not important for learning.  相似文献   
103.
This study examined adolescents' and young adults' use of topic avoidance with their mothers, fathers, stepmothers, and stepfathers. The types of topics avoided differed according to the type of parent-child relationship. Specifically, adolescents and young adults engaged in the most topic avoidance with their stepparents (regardless of whether the stepparent was a stepmother or stepfather), followed by their fathers, and then their mothers. Quantitative measures indicated that sex was the most frequently avoided topic across all relationship types. Open-ended responses revealed additional commonly avoided topics, including talking about the other parent/family, deep conversations, and money (e.g., child support payments). The most frequently reported reasons for this avoidance were self protection, relationship protection, and conflict. This research suggests that children in stepfamilies face unique decisions about topic avoidance. Communication Boundary Management Theory (Petronio, 1991) was used to explain how adolescents and young adults might engage in topic avoidance to regulate their personal boundaries, constructing relatively impermeable boundaries with some adults while maintaining looser boundaries with others. Finally, numerous practical suggestions are offered for understanding the balance between openness and closedness in stepfamilies and for promoting healthy stepfamily functioning.  相似文献   
104.
When studying verbal materials, both adults and children are often poor at accurately monitoring their level of learning and regulating their subsequent restudy of materials, which leads to suboptimal test performance. The present experiment investigated how monitoring accuracy and regulation of study could be improved when learning idiomatic phrases. Elementary school children (fourth and sixth-graders) were instructed to predict their test performance by providing judgments of learning (JOLs). They provided JOLs immediately after studying each idiom, after studying all idioms, or after studying all idioms followed by generating sentences in which the idioms were used. Correlations between JOLs and test performance showed that delayed-JOLs and delayed-JOLs with sentence generation were more accurate than immediate JOLs. JOLs after sentence generation also improved regulation of study compared to delayed-JOLs only. Analyses of JOL reaction times suggest that delayed-JOLs led children to retrieve the literal meaning of the idiom, whereas JOLs after sentence generation led children to focus on connections between studied information, contextual information, and prior knowledge. Sentence generation presents a promising method to improve regulation of study, and thus idiom learning.  相似文献   
105.
Abstract

Biochemical markers of inflammation are emerging as new predictors of risk of cardiovascular disease (CVD) and may alter acutely with exercise. Few studies have been conducted on the effects of walking on these markers or whether different walking intensities elicit varied effects. As there is growing interest in modifiable lifestyle factors such as walking to reduce CVD risk, these inflammatory responses warrant investigation. The aim of this study was to compare the effects of walking at 50% versus 70% of predicted maximal heart rate on C-reactive protein (CRP), plasma fibrinogen, and trigylcerides in sedentary post-menopausal women. Twelve post-menopausal women (mean age 58 years, s ± 6; stature 1.62 m, s ± 0.06; body mass 66.8 kg, s ± 6.2) completed two 30-min treadmill walks in a randomized cross-over design. Fasted blood samples were taken (for the determination of plasma fibrinogen, CRP, and lipids) before, immediately after, and 1 and 24 h after exercise. Triglyceride concentrations decreased from pre-exercise to 24 h post exercise at both walking intensities (time×group interaction, P < 0.05). No significant effects were observed for plasma fibrinogen, CRP, total cholesterol, low-density or high-density lipoprotein cholesterol (time x group interaction, P > 0.05). The results of this study suggest that fasting plasma triglycerides are decreased on the morning after 30 min of brisk walking at either 50% or 70% of maximal heart rate (moderate and vigorous intensity).  相似文献   
106.
The effect of strategy instruction on response time in a sequential keypressing task was compared during acquisition and retention. Specifically, this study determined the influence of: (1) an awareness strategy, (2) a non‐awareness strategy, (3) a Five‐Step Approach strategy and (4) a control condition. Sixty‐four subjects completed 250 trials of nine sequential keypresses, and 50 trials of a dual task (keypresses and verbal report). Faster response times were found for the Five‐Step Approach and non‐awareness strategies during both acquisition and retention. Introducing beginners to strategies that are used by highly skilled performers facilitated response times.  相似文献   
107.
108.
Abstract

Seven 6 s sprints with 30 s recovery between sprints were performed against two resistive loads: 50 (L50) and 100 (L100) g · kg?1 body mass. Inertia-corrected and -uncorrected peak and mean power output were calculated. Corrected peak power output in corresponding sprints and the drop in peak power output relative to sprint 1 were not different in the two conditions, despite the fact that mean power output was 15–20% higher in L100 (P < 0.01). The effect of inertia correction on power output was more pronounced for the lighter load (L50), with uncorrected peak power output in sprint 1 being 42% lower than the corresponding corrected peak power output, while this was only 16% in L100. Fatigue assessed by the drop in uncorrected peak and mean power output in sprint 7 relative to sprint 1 was less compared with that obtained by corrected power values, especially in L50 (drop in uncorrected vs. corrected peak power output: 13.3 ± 2.2% vs. 23.1 ± 4.1%, P < 0.01). However, in L100, the difference between the drop in corrected and uncorrected mean power output in sprint 7 was much smaller (24.2 ± 3.1% and 21.2 ± 2.7%, P < 0.01), indicating that fatigue may be safely assessed even without inertia correction when a heavy load is used. In conclusion, when inertia correction is performed, fatigue during repeated sprints is unaffected by resistive load. When inertia correction is omitted, both power output and the fatigue profile are underestimated by an amount dependent on resistive load. In cases where inertia correction is not possible during a repeated sprints test, a heavy load may be preferable.  相似文献   
109.
110.
Abstract

The goal of this study was to investigate the effects of different durations of skin temperature manipulation on pacing patterns and performance during a 15-km cycling time trial. Nineteen well-trained men completed three 15-km cycling time trials in 18°C and 50% relative humidity with 4.5-km (short-heat), 9.0-km (long-heat) or without (control) radiant heat exposure applied by infrared heaters after 1.5 km in the time trial. During the time trials, power output, mean skin temperature, rectal temperature, heart rate and rating of perceived exertion were assessed. The radiant heat exposure resulted in higher mean skin temperature during the time trial for short-heat (35.0 ± 0.6°C) and long-heat (35.3 ± 0.5°C) than for control (32.5 ± 1.0°C; P < 0.001), whereas rectal temperature was similar (P = 0.55). The mean power output was less for short-heat (273 ± 8 W; P = 0.001) and long-heat (271 ± 9 W; P = 0.02) than for control (287 ± 7 W), but pacing patterns did not differ (P = 0.55). Heart rate was greatest in control (177 ± 9 beats · min?1; P < 0.001), whereas the rating of perceived exertion remained similar. We concluded that a radiant heat exposure and associated higher skin temperature reduced overall performance, but did not modify pacing pattern during a 15-km cycling time trial, regardless of the duration of the exposure.  相似文献   
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