Pengaruh Bahasa Tubuh terhadap Efektivitas Komunikasi dalam Presentasi Publik

Abstract

This study focuses on the importance of body language on the effectiveness of presentations, particularly among Communication Science students at the Open University. This study uses a quantitative approach with a comparative causal type, taking a sample of 31 respondents through simple random sampling. The aim is to find evidence of a causal relationship (the influence of Body Language X on Communication Effectiveness Y) and to develop a relevant model, given the importance of communication in today's digital age. The researcher used a Likert scale questionnaire as the main measurement tool, which has been tested for quality (validity > 0.355 and reliability α > 0.90). The results of the data analysis showed a significant positive correlation (R = 0.781 and p = 0.000), with the regression equation Y' = 1.053 + 0.792X. Interestingly, the coefficient of determination () showed that 61% of communication variation could be explained by body language. These findings are supported by Mehrabian's theory and source credibility. This is reinforced by the fact that nonverbal communication factors are very powerful, especially in today's digital age. The results are important for professionals or academics who want to increase the role of body language.