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Measuring effectiveness of information retrieval (IR) systems is essential for research and development and for monitoring search quality in dynamic environments. In this study, we employ new methods for automatic ranking of retrieval systems. In these methods, we merge the retrieval results of multiple systems using various data fusion algorithms, use the top-ranked documents in the merged result as the “(pseudo) relevant documents,” and employ these documents to evaluate and rank the systems. Experiments using Text REtrieval Conference (TREC) data provide statistically significant strong correlations with human-based assessments of the same systems. We hypothesize that the selection of systems that would return documents different from the majority could eliminate the ordinary systems from data fusion and provide better discrimination among the documents and systems. This could improve the effectiveness of automatic ranking. Based on this intuition, we introduce a new method for the selection of systems to be used for data fusion. For this purpose, we use the bias concept that measures the deviation of a system from the norm or majority and employ the systems with higher bias in the data fusion process. This approach provides even higher correlations with the human-based results. We demonstrate that our approach outperforms the previously proposed automatic ranking methods. 相似文献
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Salim Abu‐Rabia 《教育心理学》1996,16(4):379-388
This study investigated the effect of cultural background of second‐language (L2) readers in different social contexts: Israeli Arabs, a minority learning Hebrew in Israel; Israeli Jews learning Arabic as L3; and Arab immigrants in Canada learning English as L2. Participants had to read related and unrelated cultural stories in their L1 and L2/L3. Results revealed that Arab students in the multicultural Canadian context better understood the unrelated cultural stories, while in both Israeli social contexts Arab and Jewish students found it difficult to read unrelated cultural stories. Comprehension results are discussed in light of the role of multiculturalism and ‘melting pot’ policies in shaping minority students’ social orientations. 相似文献
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The leakages in secondary level education brought forward the necessity to restructure the educational system so as to address the social and individual needs and meet the requirements of Turkey; therefore, a ＂reformation＂ study became an obligation. The formal education in Turkey starts at the age of 6, when the individual is shaped within the system. Determination of the characteristics of an ideal future citizen of a country should be apprehended at all levels of education and individuals should attain these appreciated characteristics. The reformed science education programs in Turkey aim to guide the individuals to be scientifically and technologically literate. Through enabling an individual, who is in a technological media, to attain the required knowledge, skills and attitudes, the individual should have the ＂science and technology literacy and creative thinking＂ skills. Individuals should recognize the technological environment they live in as well as the dimensions and facilities of technology, and should be aware of the fact that they could make use of these opportunities. In the light of this aim, this study involves the teaching of ＂separating mixtures＂ to 9th grade students in relation with science, technology, society and environment and the examination of its possible effects on students＇ achievement as well as their career choices. The Chemistry Achievement Test and the Career Choice Questionnaire were administered as pre- and post-test to serve as data collection tools. The study concluded that chemistry education in relation with science, technology, society and environment would lead students to choosing different fields for their future careers by changing their perspectives towards science. A significant increase in students＇ chemistry achievement levels was also observed. 相似文献
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Salim Abu‐Rabia 《教育心理学》1999,19(2):133-148
ABSTRACT This study investigated the social attitudes and academic skills in Russian and Hebrew of Russian‐Jewish immigrant students in northern Israel. The Russian community in Israel is unique in that its members maintain their language and culture and always show their singularity as a strong cohesive ethnic group. A total of 60 participants took part in the study. They answered an attitude questionnaire and the following tests in Russian and Hebrew: working memory, oral cloze, visual condition, phonological condition, orthographic condition, word attack, word identification and spelling test. Further, for validation of attitudes results beyond self‐report questionnaires, 30 open interviews were conducted. The results indicated that these Russian new immigrants were inslrumentally oriented towards learning Hebrew. They possessed moderate anxiety and did not learn Hebrew for army service purposes or to integrate into Israeli society. Their attitude towards the class‐learning situation was not very positive. The results of the linguistic skills in Russian and Hebrew indicated superiority of the former. Regression procedures indicated that only the spelling test score of the Russian language was a significant predictor of Hebrew word recognition. 相似文献
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This study examines the higher education experience among Palestinian Arab females in two national spaces and seeks to determine whether studying at an Arab institution of higher learning in a nearby Arab country can alleviate the emotional and economic difficulties that affect Palestinian women at Israeli universities. What can institutions of higher learning in Israel learn or derive from the proposed model to relieve the alienation and exclusion that their female Palestinian students experience? The study will compare two geographically distinct groups of women students. The first is a group of Palestinian women who attend university in Jordan, while the second consists of Palestinian women of Bedouin origin from southern Israel who study in the Jewish Israeli cultural space. The study seeks to shed light on the experience of Muslim students in Western and Muslim universities. 相似文献
6.
Rabia M. Yilmaz Ozlem Baydas 《Educational technology research and development : ETR & D》2017,65(6):1547-1567
The aim of the study is to examine undergraduate students’ awareness of metacognition, the metacognitive strategies they use in their learning and their learning performance in pre-class asynchronous activity in a flipped classroom. The sample consisted of 47 undergraduate students. Eleven students were not included in this study since they did not participate in all quizzes and most of the metacognitive strategy activities. Metacognitive Awareness Inventory and Metacognitive Strategies Evaluation Activities were used as data collection tools. The results showed that Computer Education and Instructional Technology students’ metacognitive awareness was at a high level and their metacognitive strategy levels and learning performances differed weekly. Post hoc results indicated no difference between metacognitive strategy and learning performance in the first three weeks. However, the results of the first 3 weeks differed from those of the 4th and 5th weeks. In addition, our regression analysis result indicated that using metacognitive strategies predicted 80% of students’ learning performance. This rate shows the importance of using metacognitive strategies for the learning process in pre-class asynchronous activity in the flipped classroom. 相似文献
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This research examined the function within lexical access of the main morphemic units from which most Arabic words are assembled, namely roots and word patterns. The present study focused on the derivation of nouns, in particular, whether the lexical representation of Arabic words reflects their morphological structure and whether recognition of a word involves recognition of its morphological constituents. The morphology of Arabic language constitutes two main systems: inflectional morphology and derivational morphology. Inflectional morphology is used to express grammatical relations and derivational morphology deals with the formation of new words in language; it contains two types of word patterns: verbal and nominal. In this study, it was assumed that roots are lexical entities that can facilitate lexical access to a large cluster of words that derive from them, whereas word patterns are not lexical entities and have no role in access to words assembled by them. The lexical representations of the main morphemic units were examined in four experiments using skilled readers applying masked priming technique tasks: lexical decision and naming. The results indicated that previous exposure to a word sharing the same word pattern had no marked facilitating effect on lexical decision or on naming. The main conclusion of this study on the morphology of Arabic is that roots and word patterns have no essential role in word organisation in the mental lexicon. In addition, words in nominal pattern in derivational morphology are represented in their whole shape in the mental lexicon and each word has an independent representation. 相似文献
8.
After the 2001 meeting of the European Ministers of Education held in Prague, higher education institutions in Turkey took serious actions in order to implement the goals of the Bologna Declaration (1999). Arrangements made for the democratization of universities and student participation in the decision‐making process formed one of the predominant actions. The formal point of these arrangements – aimed at student involvement in the university governance process via Student Councils and their representatives, was prescribed by law and forced universities to comply with the process. The present research provides information about the legal arrangements in higher education institutions concerning student involvement in the university decision‐making process and the obstacles met within the course of application. In addition, it presents the findings of an empirical study related to student representation and involvement in governance through the agency of the Student Councils. 相似文献
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Salim Abu‐Rabia 《教育心理学》1995,15(3):323-336
This study investigated the relationship between attitudes and cultural background of 52 eighth‐grade Arab students in Canada and their reading comprehension of texts with English and Arabic content. An attitudes questionnaire, semi‐structured interviews and stories with cultural content in Arabic and English were used. Contrary to predictions made by schema theory, students scored higher whenever they read texts in English, their second language, regardless of cultural content. The multicultural reality of Canada seems to have provided students from different ethnic background with wide‐ranging cultural knowledge to cope successfully with unfamiliar cultural stories presented to them in the English language. Furthermore, gender differences were found among the Canadian Arab students with regard to the type of attitudes that motivated them to study English: male students showed predominantly instrumental attitudes, while females showed predominantly integrative attitudes towards learning English and becoming integrated into Canadian society. It is concluded that sociopsychological models of second‐language (L2) learning should be expanded to take into consideration gender differences and the gains that females coming from conservative societies start to achieve by learning the language of the host country and by integrating into its society.