A Study on Students’ Writing Ability in Rhetorical Structure of Argumantative Essay of the Third Semester Students of ST-KIP ABDI PENDIDIKAN Payakumbuh

This research was descriptive quantitativeresearch, which used to know the students’
ability of writing rhetorical structure in introductory paragraph of argumentative essay, then
the students’ ability of writing rhetorical structure in body (argument) of paragraph an
argumentative essay, finally it was found that the students’ ability of writing rhetorical
structure in concluding paragraph.
In this research, the writer took the third grade students’ of English Department at
STKIP ABDI Pendidikan Payakumbuh in 2012/2013 Academic Year. The number of English
Department students were 30 students. In taking the samples the writer used the cluster
random sampling because the writer chose the samples randomly.The instrument of this
research was writing test. To know the validity of instrument the writer used the content
validity because the second grade students of English Department had learnt how to make an
essay. To know the reliability of this instrument, the writer used two scorers method: both
scorers in this research were English teacher. Then, the data had analyzed by using Sudijono
formula.
Based on the result of the research at the second grade students’ ability of writing
rhetorical structure in introductory paragraph of argumentative essay was fair (59.83), then
the students’ ability of writing rhetorical structure in body (argument) of paragraph an
argumentative essay was fair (54.12 ), finally it was found that the students’ ability of writing
rhetorical structure in concluding paragraph was good (63.19).