The Effects of Switching Non-Spatial Attention During Conversational Turn Taking

Area of Science:

• Cognitive Psychology
• Auditory Neuroscience
• Speech Perception

Background:

• Understanding attentional shifts in complex auditory environments is crucial.
• Multi-talker conversations pose significant challenges for selective attention.
• Previous research highlights the role of voice in auditory scene analysis.

Purpose of the Study:

• To investigate the cognitive cost of switching attention to a different target voice in a multi-talker setting.
• To assess the impact of endogenous attention shifts on word recall and recognition.
• To determine if voice characteristics influence attentional switching costs.

Main Methods:

• Two experiments utilized matrix sentences in a yes-no recognition task.
• Participants were exposed to multi-talker conversations with varying target voice conditions.
• Measures included target hit rate, sensitivity, and masker confusion errors.

Main Results:

• Performance significantly worsened when the target voice changed post-turn-taking gap.
• A decrease in target hit rate and sensitivity was observed after a voice switch.
• Increased masker confusion errors indicated difficulties in disengaging from the previous target voice.

Conclusions:

• Switching attention to a new talker incurs cognitive costs, involving both engagement and disengagement.
• Attentional bias towards a previously heard voice can persist after a conversational turn-taking gap.
• Attentional switching costs are consistent regardless of the acoustic distinctiveness between talker voices.