***Previous work:***\ Speakers track the probability that a word will occur in a particular context and utilize this information during phonetic processing. For example, content words that have high probability within a discourse tend to be realized with reduced acoustic/articulatory properties. Such probabilistic information may influence L1 and L2 speech processing in distinct ways (reflecting differences in linguistic experience across groups and the overall difficulty of non-native speech processing). ***Current work:***\ Forty-eight English speakers - 24 L1 and 24 L2 (L1-Mandarin) - performed a referential communication task, describing sequences of simple actions. The two groups of speakers showed similar effects of discourse-dependent probabilistic information on planning times and content word production. In contrast, only L1 speakers showed effects of discourse status on function words. This suggests that while L2 speakers can successfully track discourse-dependent probabilities, their reduced scope of planning limits the influence of such information on phonetic processing. The methods and results for this study can be found [here][1]. Anonymized data and R scripts for each analysis are archived. Analyses include: - Response times: [analysis script][2] and [data][3] - Noun durations: [analysis script][4] and [data][5] - Monte Carlo simulation for noun durations: [analysis script][6] and [data][7] - Determiner vowel durations: [analysis script][8] and [data][9] - Multivariate analysis of noun and determiner vowel durations [analysis script][10] and [data][11] - Monte Carlo simulation for multivariate analysis [analysis script][12] and [data][13] - Disfluency/error rates: [analysis script][14] and data ([1][15], [2][16], [3][17]) \ \ Acknowledgments: This research was supported by the National Institutes of Health under Grant 1R21HD077140. [1]: https://osf.io/e3x62/ [2]: https://osf.io/r3hhh/ [3]: https://osf.io/6shdn/ [4]: https://osf.io/5gq5j/ [5]: https://osf.io/a4y5k/ [6]: https://osf.io/4rezy/ [7]: https://osf.io/6shdn/ [8]: https://osf.io/f3a29/ [9]: https://osf.io/6shdn/ [10]: https://osf.io/rb85s/ [11]: https://osf.io/zsbtr/ [12]: https://osf.io/vq2m4/ [13]: https://osf.io/6shdn/ [14]: https://osf.io/8j8u7/ [15]: https://osf.io/8mu7y/ [16]: https://osf.io/c9v8u/ [17]: https://osf.io/nns46/