This study aims at identifying whether 1) Group Investigation is moreeffective than direct method to teach speaking; 2) Students with low level ofcommunication apprehension have better speaking skill than those with high levelof communication apprehension; 3) there is an interaction between teachingmethods used and students? level of communication apprehension.The research was conducted in the second semester of the eighth grade ofSMP N 1 Trucuk in the academic year of 2013/2014. The sampling used wascluster random sampling. The samples were two classes which consist of 28students of class VIIIG as the experimental class and 28 students of class VIIIA asthe control class. The instruments used to collect research data cover thecommunication apprehension?s questionnaire, and speaking test.The data obtained after the treatment was analyzed using descriptiveanalysis and inferential analysis. Descriptive analysis was used to find out themean, median, mode, histogram and polygon of speaking score. Still, it isimportant to assign normality and homogeneity test as the prerequisite of usinginferential analysis. Normality test was used to know whether the sampledistributes normally or not while homogeneity test was used to know the data arehomogeneous or not. Inferential analysis used was ANOVA and Tukey Test. Thehypothesis was tested using ANOVA to find out whether the difference issignificant or not. If Ho is rejected, the analysis was continued to know the degreeof effectiveness between two method using tukey test. The finding reveals that:(1) Group Investigation is significantly different from direct method to teachspeaking; (2) the students with low level of communication apprehension havebetter speaking performance than those with high level of communicationapprehension; (3) there is an interaction between teaching methods and thestudents? level of communication apprehension.Based on research findings, it can be concluded that Group Investigation isan effective method to teach speaking to the eighth grade students of SMP N 1Trucuk in the academic year of 2013/2014. However, in the implementation of themethod, a teacher must consider the students? level of communicationapprehension. As proved in this research, communication apprehension influencesthe students? speaking skill. By considering the students? level of communicationapprehension, a teacher can use the method properly to teach speaking in order toimprove the students?achievment optimally. For other researchers, it is hoped thatthese research findings can be used as a reference for future researches. Moreover,other researchers may conduct researches viewed from other psychologicalaspects.Keywords: experimental research, speaking skill, group investigation, directmethod, communicaton apprehension