Studies on implicature inference-making ability of tourism students are ‘deficient,’ meanwhile implicature inference-making ability is crucial for tourism students. The current study aimed at: a) comparing implicature inference-making ability of sentences and short conversations between the low proficiency and high proficiency Tourism college students and b) exploring the factors which affect the learners’ implicature inference making-abilities. This is a mixed-methods study. The participants involved 320 students. Data collected with test for inferential ability were analyzed with Two-way Anova and qualitative data through iterative analysis. It is concluded that implicature inference-making ability of single sentences and short conversations between the low proficiency and high proficiency of the tourism college students is significantly different. However, there is no interaction of types of discourse and proficiency levels on implicature inference-making ability. Since the degree of skills affects implicature inference-making ability, the improvement of the students’ pragmatic understanding in English for Tourism should synchronize the types of implicature inference-making ability to be applied and their levels of skills.
                        
                        
                        
                        
                            
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