Expressive punctuation: how punctuation changes the perceived valence of discourse referents in computer-mediated communication

This article explores the role of five expressive punctuation marks – multiple exclamation marks (!!!), exclamation mark (!), full stop (.), ellipsis (...), and null punctuation (ø) – as cues to writer attitudes in CMC. Specifically, it investigates how the underlying meaning of expressive punctuation influences the perceived emotional valence of discourse referents within exclamative constructions. In a 1x5 between-subjects repeated measures design, valence ratings were collected for 120 discourse referents embedded in exclamative constructions manipulated by message finale punctuation mark (e. g., What a view!!!/!/./…/ø) on a 1 (negative) to 9 (positive) scale. For inherently positive discourse referents, a clear positivity hierarchy in the overall valence of embedded discourse referents emerges, indicating a differential influence of punctuation on perceived valence: multiple exclamation marks > exclamation marks > null punctuation > full stop > ellipsis. For inherently negative discourse referents, the differences between the conditions are less distinct. Notably, only multiple exclamation marks yield a significantly lower valence rating within that range of values. While the findings for inherently positive referents align with prior assumptions on the expressive meaning of different punctuation marks in CMC, the observed pattern for inherently negative referents cannot be readily explained by existing literature on expressive punctuation in CMC.