Computerized Database of English Sentences and Its Statistic Analysis Pertaining to Instruction for the Development of Fundamental Reading Ability in Various Academic Fields

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Throughout the research within two years we have obtained two main achievements as follows :Construction of the Database(1) We develop a high-speed and high-accuracy character recognition system. This system is established through various computer programs and machine-readable dictionaries which support the deficiencies of the commercial optical-character-recognition software. Our system "recognizes" English character strings not from the data transferred directly from the image-scanner, but from the image-datafiles obtained via other software. With this system, we can obtain a large amount of fundamental English sentence data with greater efficiency. (2) The introduction of the computer network system enables us to obtain quite easily the fundamental English data. (3) The sentence data are correctly formatted into a uniform databasestyle (1 record/1 sentence) suitable for the following computational processings.Analyzes of the Database(1) The "concordance processing" is possible for the database-sentences. At the same time, we investigate the pattern of usage of the English verbs which appears in the textbooks for Japanese junior-high schools. (2) We build up a complex automatic tag assignment program named TAGASS (TAG ASSigner) which annotates possible grammatical marker (s) to every word in the database-sentences. (3) The program which picks up only one preferable tag from the set of tag-candidates is completed. This program, which realizes more than 80% accuracy, is written under the probabilisticstatistic algorithm. We will investigate the possibillity of the ideal transaction between this algorithm and the grammar-based algorithm in future research.