THE EFFECT OF TEACHING METHODS; AND STUDENTS PERSONALITIES ON STUDENTS; ACHIEVEMENT IN DESCRIPTIVE WRITING

The objectives of this experimental research were to investigate whether: 1) students’ achievement in descriptive writing taught by using Project-Based
Learning method was higher than taught by using Problem Based Learning method, 2) students’ achievement in descriptive writing with introvert personalities was higher than those with extrovert personalities, 3) there was interaction between teaching methods and students’ personalities on students’achievement in descriptive writing. The population of this research was the
students in grade VIII of SMP GKPI Padang Bulan Medan 2016/2017 school academic year. The total number of population were 72 students. There were 51 students selected as sample of this research by applying Teaching Methods. The research design was experimental research by using 2×2 factorial design. The students were divided into two experimental groups. The experimental group I
was treated by using Project-Based Learning and experimental group II was treated by using Problem Based Learning. The questionnaire was conducted for
classifying the students upon the introvert and extrovert personalities. Students’achievement in descriptive writing was measured by using writing test. The data were analyzed by applying two-way analysis of variance (ANOVA) at the level of significance α = 0.05. The result reveals that 1) students’ achievement in descriptive writing taught by using Project-Based Learning method was higher
than taught by using Problem Based Learning with total mean scores 67.97 > 64.6. 2) students’ achievement in descriptive text with introvert personalities was
higher than that with extrovert personalities with total mean score 76.52 > 56.28.3) there is interaction between teaching methods and students’ personalities on
students’ achievement in descriptive writing with the total average scores 80.47>56.96. After computing the Scheffee-test, the result showed that introvert
students got higher achievement if they were taught by using Project-Based Learning method while extrovert students got higher achievement if they were
taught by using Problem Based Learning method.