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先前知识、超文本层次深度和类型对低结构化信息搜索的影响 总被引:12,自引:1,他引:11
探讨先前知识、超文本层次深度和类型对低结构化中文信息搜索的影响。采用2(先前知识)×8(文本组织形式)的被试间设计,以平均搜索时间和迷路指数为因变量。结果发现:(1)先前知识对线性文本和超文本(尤其是层次型超文本)的搜索均有利;(2)随着层次深度的增加,对超文本的搜索时间显著增加,迷路指数也呈增加的趋势;(3)搜索线性文本的迷路指数显著低于超文本;(4)不同类型超文本的搜索绩效基本无显著差异。因此,先前知识、层次深度对超文本信息搜索的影响比超文本类型和信息的结构化水平更重要。 相似文献
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时间应激对不同结构超文本信息搜索绩效的影响 总被引:1,自引:0,他引:1
实验探讨了时间应激对不同结构超文本信息搜索绩效的影响效应。采用 3× 2被试间设计 ,自变量为超文本结构 (层次、混合、网状 )和时间应激(应激组和对照组 ) ,因变量为答题速度和迷路指数。 48名大学生或研究生被试参与实验。结果发现 ,时间应激对超文本搜索绩效有重要影响。更具体地说 ,时间应激对网状结构超文本搜索绩效的影响尤为明显。因此 ,在需对用户浏览时间进行控制的情况下 ,最好不要采用网状结构的超文本设计。另外 ,超文本结构对超文本搜索绩效的影响效应再次得到证实。 相似文献
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本研究采用传统印刷文本、普通电子文本和超文本导航模式考察阅读材料的呈现方式对儿童阅读活动的影响.研究结果表明:(1)在三种呈现方式条件下,高阅读水平者的阅读成绩显著优于低水平者;女生成绩显著优于男生;(2)阅读材料的不同呈现方式对儿童阅读理解无显著影响;(3)在三种呈现方式中,儿童对超文本的正向评价要优于传统印刷文本和普通电子文本.这表明大部分儿童可以在短时间内接受,并熟悉非线性文本方式. 相似文献
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通过两个实验考察了结构、任务类型和导航对超文本信息搜索绩效的影响。实验一采用2(层次结构,混合结构)×2(特定任务,关系任务)的被试内设计,探讨了超文本结构和任务类型对信息搜索的影响;实验二在实验一的基础上,采用2(层次结构,混合结构)×2(有导航图,无导航图)的被试内设计,考察超文本结构和导航对关系任务信息搜索的影响。结果表明:(1)超文本结构和任务类型对信息搜索绩效有显著的交互影响,就关系任务而言,混合结构超文本优于层次结构超文本,但就特定任务而言,两者无显著差异;(2)导航对信息搜索行为有指导作用,尤其对层次结构超文本有利;(3)两种主观指标的结果与客观指标存在一定程度的一致性。 相似文献
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采用EyeLink2000眼动仪,以14名老年人和14名青年人为被试,探讨他们阅读空格汉语文本的注视位置效应.阅读材料分为正常无空格文本和词间空格文本两种.结果发现:(1)在阅读词间空格文本和正常无空格文本时,老年人与青年人都表现出单次注视的首次注视是位于词的中心,多次注视的首次注视是位于词的开头;(2)老年人阅读正常无空格文本时对词尾的注视概率显著低于词间空格文本,而青年人则没有差异.结果表明老年人与青年人在阅读空格文本时存在注视位置效应. 相似文献
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网络不同于传统媒介的最大特点是以灵活的超文本形式呈现信息,超文本将关联的信息以网络状形式加以组织,读者可以通过链接从一个节点跳转到其他任何一个节点。本文回顾了超文本阅读的研究历程,指出目前这一领域研究存在的困境并试图寻找原因,在此基础上提出了今后研究的建议。 相似文献
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In two experiments, we identified two main strategies followed by hypertext readers in selecting their reading orders. The first consisted in selecting the text semantically related to the previously read section (coherence strategy), and the second in choosing the most interesting text, delaying reading of less interesting sections (interest strategy). Comprehension data revealed that these strategies affected learning differently as a function of the reader's prior knowledge. For low-knowledge readers, the coherence strategy supported better learning of the content. This effect seems to rely on the improvement of reading order coherence induced by this strategy. By contrast, for intermediate-knowledge readers the coherence and the interest strategies benefited comprehension equally. In both cases, learning was supported through the active processing induced by these strategies. Discussion focuses on resolving inconsistencies in the literature concerning whether or not hypertext supports better comprehension than does traditional linear texts. 相似文献
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Three experiments using Chinese text were conducted to investigate word spacing and its effect on reading performance. In Exp. 1, a sonogram detector was used to analyze interword and intercharacter (within a word) time intervals from text read aloud by professional TV broadcasters versus college graduates. The results showed interword intervals were significantly longer than intercharacter intervals, indicating that interword spacing has psychological reality in speech. Exp. 2 examined the effect on reading performance due to separating the characters that compose a word. Separating the characters of a word did not decrease reading accuracy but did result in significantly longer reading times. Exp. 3 explored the effect of word spacing in Chinese sentences on reading performance. Analysis showed that word spacing did not affect reading accuracy, but half character and whole-character spacing significantly reduced reading time. The results of the present study suggest that word spacing in Chinese text layout enhances reading performance. Word spacing may help the reader to segment more quickly a string of characters into words and reduce the likelihood of misinterpretation. Also, ambiguity of sentence structure severely degraded reading accuracy. The implications of the results for word spacing design in Chinese text are discussed. 相似文献
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We compared the effectiveness of two versions of the NetBook data model for nonlinear text—one with links and one without. Users who accessed information through specifications based on properties and values alone performed better than users who employed such specifications as well as hypertext links. Protocol analysis revealed that hypertext links were useful when a subject’s specifications were unspecific but correct. However, hypertext could rarely compensate for inaccurate specifications. Design recommendations are included. 相似文献
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