The relationship between critical thinking skill and argumentative writing skill (a correlational study at the twelfth grade students of SMA Kharisma Bangsa, Tangerang Selatan)

The objective of this study was to describe the relationship between critical thinking skill and argumentative writing skill. The population of this study was the twelfth grade students of SMA Kharisma Bangsa. Correlatioan method was applied in this study. There were two instruments in collecting the data; the first instrument was to measure students? critical thinking skill, in this case, Cornell Critical Thinking Tests, Form X were administered to the samples. The second instrument was to measure students? argumentative writing skill, in this study, an instruction asking the students to write argumentative essay were given to the students. The data collected then were calculated by using Pearson Product Moment correlation coefficient and t-test with sig. 5% and 1%. Based on the research analysis, it shows that the result of the Product Moment correlation is = 0.573, it is higher than r table value in the significance of 5% and 1%. ( = 0.573> ( ) =0.304 and = 0.573> ( )). Moreover, based on the calculation of the t test, it is found that the score of t= 4.01 and it is higher than the score of t table, which t=4.01> ( ) ( ) =1.67 and t=4.01> ( ) ( )= 2.43. It means that Ho is rejected and H1 is accepted. Besides, based on determination coefficient analysis, critical thinking skill has 32.8% contribution in the students? argumentative writing skill. Based on the result above, it shows that there is significant relationship between critical thinking skill and argumentative writing study of the twelfth grade students of SMA Kharisma Bangsa, academic year 2015/2016. Therefore, it can be concluded that the higher the students critical thinking skill, the better their argumentative writing skill