<![CDATA[Within English language learning, oral communication relies heavily on pronunciation accuracy, particularly during the generation of English diphthongs. Speech intelligibility and communicative effectiveness are frequently diminished among Indonesian EFL learners due to persistent difficulties in recognizing and producing correct diphthong sounds. To explore this issue, a study was conducted at SMAN 1 Candung to measure the correlation between students' auditory discrimination ability and their English diphthong pronunciation accuracy. A total of 46 first-grade students participated in this quantitative correlational study, where data were gathered through a pair of evaluations: an auditory discrimination test and a diphthong pronunciation test. Descriptive statistical analysis, tests for normality and linearity, and Pearson Product-Moment Correlation were applied to process the data. Outcomes demonstrated that the mean performance score for auditory discrimination was 63.48, whereas the mean value for pronunciation accuracy reached 69.57. The data satisfied the criteria for normal distribution based on normality testing. Analysis using the Pearson Product-Moment correlation yielded a correlation coefficient of r = -0.196 alongside a p-value of p = 0.191 (p > 0.05), denoting a negative correlation that was both very weak and statistically insignificant. As a result, the null hypothesis was retained due to a lack of support for the research hypothesis. It was determined that an individual's auditory discrimination ability does not bear a significant correlation with their precision in pronouncing English diphthongs. Factors outside of auditory discrimination skill may instead determine students' pronunciation accuracy. These conclusions present empirical evidence regarding the interaction between auditory perception and pronunciation accuracy, offering useful implications for EFL pedagogy by highlighting the combined practice of auditory training and oral pronunciation exercises.]]>
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