%N 1 %T Flawed self-assessment: Investigating self-and other-perception of second language speech %D 2016 %P 122-140 %V 19 %O This article has been published in a revised form in Bilingualism: Language and Cognition https://doi.org/10.1017/S1366728914000832. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © 2014 Cambridge University Press. %A P Trofimovich %A T Isaacs %A S Kennedy %A K Saito %A D Crowther %J Bilingualism %L discovery1525231 %X This study targeted the relationship between self-and other-assessment of accentedness and comprehensibility in second language (L2) speech, extending prior social and cognitive research documenting weak or non-existing links between people's self-assessment and objective measures of performance. Results of two experiments (N = 134) revealed mostly inaccurate self-assessment: speakers at the low end of the accentedness and comprehensibility scales overestimated their performance; speakers at the high end of each scale underestimated it. For both accent and comprehensibility, discrepancies in self-versus other-assessment were associated with listener-rated measures of phonological accuracy and temporal fluency but not with listener-rated measures of lexical appropriateness and richness, grammatical accuracy and complexity, or discourse structure. Findings suggest that inaccurate self-assessment is linked to the inherent complexity of L2 perception and production as cognitive skills and point to several ways of helping L2 speakers align or calibrate their self-assessment with their actual performance.