Hearing without listening: Attending to a quiet audiobook

Area of Science:

• Cognitive Psychology
• Auditory Perception
• Neuroscience

Background:

• Standard hearing tests may not capture real-world cognitive challenges associated with sub-optimal hearing.
• Sustained attention is crucial for comprehension but can be taxed by listening conditions.

Purpose of the Study:

• To investigate the cognitive consequences of listening at sub-optimal volume levels.
• To determine if reduced auditory intensity impacts memory recall and attention.

Main Methods:

• Experiment 1: Participants listened to an audiobook at a quiet but audible level for 50 minutes, with recall assessed and compared to a group listening at a comfortable volume.
• Experiment 2: Recall was compared for sentences presented in isolation versus within a continuous narrative to isolate effects of sustained attention.

Main Results:

• Participants listening at a quiet volume showed reduced sequential accuracy and fact recall compared to those listening at a comfortable volume.
• When sentences were presented in isolation, the recall differences between listening volumes disappeared, indicating the effect is tied to sustained listening.

Conclusions:

• Sub-optimal hearing, even when words are discriminable, incurs a cognitive cost by demanding increased sustained attention.
• The real-world cognitive impact of reduced auditory intensity is evident when tasks require prolonged focus.