Often Overlooked Aspects of Sound Symbolism: The Influence of Participants' Characteristics on Size Ratings

Sound symbolism is a non-arbitrary mapping between phonetic properties and meanings. The existence and nature of sound symbolism have long been the subject of empirical research. It is rarely recognized, however, that participants' intrinsic characteristics (e.g., age, gender, language knowledge), in addition to the commonly studied phonetic features, may also influence size ratings. Our study aims to empirically investigate the impact of participant-specific characteristics on size ratings: It also aims to examine whether these characteristics have a direct impact when considering the impact of phonetic features or they rather modify the effects of phonetic features. The current research reports a novel analysis of a previously published dataset with new research questions and previously unused (participant-specific) data. We show that (a) the participants' characteristics did not affect overall size ratings; however, (b) in some cases, they modify (intensify or weaken but do not reverse) the effect of phonetic features on size ratings. Our results emphasize a more comprehensive treatment of sound symbolism, one that considers not only phonetic but also non-phonetic factors in sound symbolism research.