Vikit Fadila Rohmah , 2201413091 (2017) THE IMPLEMENTATION OF PBX (PASSIVE BOX) IN TEACHING PASSIVE VOICE (True-Experimental Study of Eleventh Grade Students of SMA N 1 Kudus in the Academic Year 2016/2017). Under Graduates thesis, Universitas Negeri Semarang.

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Abstract

This final project is based on study which attempted to find out the influence of implementation of PBX (Passive Box) in teaching passive voice. Here, I decided to introduce PBX (Passive Box) as an additional medium to help students in mastering passive voice. The study was conducted to find out the significant difference between the group who learned using PBX (Passive Box) and who learned without using PBX (Passive Box). According to the English teacher of SMAN 1 Kudus especially who teaches the eleventh graders, learning passive voice becomes hard for students when they need to transform the active into passive voice because they are stuck in the formula of passive voice in different tenses. Furthermore, I choose PBX (Passive Box) because in PBX the formula of passive voice from all tenses is summarized in a table, so that students can memorize the formula in a simple way. Based on the problem faced by the students, I designed true-experimental study using post-test only control group design in implementing PBX (Passive Box) in teaching passive voice. The population of this study was the eleventh graders of SMA N 1 Kudus. The sample of the study was chosen by using purposive sample technique; XI Science 5 as the experimental group and XI Science 3 as the control group. The numbers of the students in control group were 36 and in experimental group were 37. The experimental group was asked to learn passive voice using video and PBX (Passive Box), and the control group was asked to learn passive voice without using PBX (Passive Box) and using only video. The achievement result of implementing PBX in learning passive voice can be seen from the mean score of experimental group (86.06) which is higher then the mean score of the control group (80.14). To check the significant difference of the score, I input the whole score in SPSS to find the equality of variances in Levene’s Test and the equality of means in t-test. From the SPSS, I found that sig. in Levene’s test was 0.232 which was less than alpha 0.05 meant that the equality of variances are same. Then I moved to t-test and found that sig (2-tailed) in t-test was 0.002 in equal variances assumed and 0.003 in equal variances not assumed. Both of the sig. (2tailed) were less than alpha 0.05 which was meant that the difference between two variables in experimental and control group were significant. Therefore, PBX (Passive Box) can be used as an additional medium in learning passive voice for Senior High School students.

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