چکیده (انگلیسی):

Scientific writing skills are skills that are stillconsidered difficult to foreign students who learnIndonesian
language. In connection with the results of this research, scientific writing skills students lack pertinent in
understanding aspects of the composition and the ability to reason therefore, this study aims to determine
whether there is a relationship between: (1) understanding the composition aspects and scientific writing
skills, (2) the ability to reason and scientific writing skills, and (3) understanding of aspects of the composition
and the ability to reason together with scientific writing skills. This research was starting March toMay 2015.
The research method used is quantitative method. with correlational survey techniques. The population of
this research is all class “Teaching Indonesian to Speakers of Other Language” in Sebelas Maret University,
Solo, Central Java, Indonesia, with a sample of 104students, they were taken by using the claster random
sampling technique. The analysis technique used regression and correlation. Differential analysis using the
statistical technique of regression and correlation (simple, double). The results showed that: (1) there is a
positive relationship between the understanding of aspects of the composition and scientific writing skills. (2)
there is a positive correlation between the ability to reason and scientific writing skills. and (3) there is a
positive relationship between the understanding of aspects of the composition and the ability to reason
together with scientific writing skills. Concluded that jointly understanding aspects of the composition and
the ability to reason a significant contribution tothe scientific writing skills. It shows that thesetwo variables
can be a good predictor for scientific writing skills in Teaching Indonesian to Speakers of Other Language.