THE DEVELOPMENT OF AMERICAN ENGLISH VOCABULARY HANDBOOK FOR THE SECOND-YEAR NAVAL CADETS
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Abstract
The objectives of the research were to 1) study the background knowledge on American English vocabulary of second-year naval cadets, 2) develop and investigate the efficiency of American English vocabulary handbook for second year cadets based on the 80/80 criterion, and 3) compare the American English vocabulary achievements of the naval cadets studying through the American English vocabulary handbook and a traditional method. The population was 88 second-year naval cadets totaling 6 sections and studying English for Communication 1 in the first semester of academic year 2022. The sample group of the research consisted of 60 second-year naval cadets from two sections, 30 naval cadets each, and was selected through a cluster random sampling by using classroom as a sampling unit. Then a simple random sampling through a lottery technique was used to determine the experimental group and the control group. As a result, the electrical engineering section 1 (EE.1) was chosen as the experimental group, and the electrical engineering section 2 (EE.2) was chosen as the control group. The research instruments were 1) a background test with reliability of 0.85, 2) the American English vocabulary handbook, and 3) an English vocabulary achievement test with reliability of 0.89. Data were statistically analyzed by percentage, mean, standard deviation, 80/80 efficiency indices and a t-test.
The results showed that 1) the average score on American English vocabulary was overall at a fair level with percentage of 60.2, 2) the quality of the handbook assessed by the experts was at a very good level and the efficiency of the handbook was 81.44/83.62, and 3) the American English vocabulary achievements of the naval cadets studying through the American English vocabulary handbook was higher than those studying through a traditional method at 0.05 statistical significance level.
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บทความทุกเรื่องได้รับการตรวจความถูกต้องทางวิชาการโดยผู้ทรงคุณวุฒิ ทรรศนะและข้อคิดเห็นในบทความวารสารบัณฑิตศึกษา มหาวิทยาลัยราชภัฏวไลยอลงกรณ์ ในพระบรมราชูปถัมภ์ มิใช่เป็นทรรศนะและความคิดของผู้จัดทำจึงมิใช่ความรับผิดชอบของบัณฑิตวิทยาลัย มหาวิทยาลัยราชภัฏวไลยอลงกรณ์ ในพระบรมราชูปถัมภ์ กองบรรณาธิการไม่สงวนสิทธิ์การคัดลอก แต่ให้อ้างอิงแหล่งที่มา
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