Previous research has underscored the role of negotiation in providing appropriate conditions for second language acquisition. Varonis and Gass (1985b), in a study of English as a Second Language (ESL), found greater amount of negotiation in non-native–non-native interaction than in native-non–native interaction. Given the increased interest in computer mediated communication and in its applications to language learning, this investigation explores whether those results are obtained when using an electronic written medium. This study compared the negotiations generated by dyads of non-native speakers (NNS–NNS), native speakers (NS–NS), and non-native and native speakers (NNS–NS), in the oral and written modes. The results revealed that the NNS–NS group negotiated in the oral mode significantly more than in the written mode; this group also negotiated significantly more than the other two groups in the oral mode. Learners' shared social and linguistic background seemed to have facilitated the comprehension of input. Conversely, lack of familiarity with native speaker's pronunciation seemed to have caused more breakdowns in the oral conversations of the mixed dyads. Though the results of this study suggest that negotiation is not the main resource to obtain modified input in a foreign language context, other learning strategies that may be beneficial in the language learning process were at use in learner-learner interaction.