Poster: Memory and Listening Effort in Conversations: The Role of Spatial Cues and Cognitive Functions

Conversations involving three or more people often include phases where one conversational partner listens to what the others are saying and has to remember the conversational content. It is possible that the presence of speech-related auditory information, such as different spatial positions of conversing talkers, influences listener's memory and comprehension of conversational content. However, in cognitive-psychological experiments, talkers’ audio signals are often presented diotically, i.e., identically to both ears as mono signals. This does not reflect face-to-face conversations where two talkers’ audio signals never come from the same spatial location. Therefore, in the present study, we examine how the spatial separation of two conversing talkers affects listener’s short-term memory of heard information and listening effort. To accomplish this, participants were administered a dual-task paradigm. In the primary task, participants listened to a conversation between a female and a male talker and then responded to content-related questions. The talkers’ audio signals were presented via headphones at a distance of 2.5m from the listener either spatially separated (+/- 60°) or co-located (0°). In parallel to this listening task, participants performed a vibrotactile pattern recognition task as a secondary task, that is independent of both auditory and visual modalities. In addition, we measured participants’ working memory capacity, selective visual attention, and mental speed to control for listener-specific characteristics that may affect listener’s memory performance. We discuss the extent to which spatial cues affect higher-level auditory cognition, specifically short-term memory of conversational content.