
Sometimes scientific findings reveal connections that seem surprising at first but become more understandable on closer consideration—such as a correlation between lower IQ and difficulty following conversations in noisy settings.
Previous research has shown that neurodiverse individuals may struggle more than others to hear speech in noisy environments. To explore this further, a team of researchers from the University of Washington conducted a study to gather additional data.
Participants and Key Findings
The study involved 12 participants with autism and 10 with fetal alcohol syndrome, both conditions associated with challenges in hearing speech amid background noise and encompassing a range of IQ levels. The control group consisted of 27 neurotypical participants matched for age and sex.
After assessing volunteers’ ability to focus on the details of a computer-generated conversation amid multiple overlapping voices—a challenge known as the cocktail party problem—researchers discovered that individuals with lower IQs generally struggled more with the task.
Auditory neuroscientist Bonnie Lau from the University of Washington noted, “The link between cognitive ability and speech perception performance went beyond any diagnostic category. This pattern was observed consistently across all three groups.”

Cognitive Factors Underlying Speech-in-Noise Difficulties
All participants in the study had normal hearing, suggesting that difficulties understanding speech in noisy settings may stem more from cognitive factors than from problems with the ears themselves.
It’s a logical conclusion: distinguishing one person’s words amid background noise requires separating different sound streams, identifying which ones matter, and focusing on the relevant speech — a complex process of auditory processing.
To sustain a conversation, a person must focus on and interpret a range of auditory and visual signals, while also responding suitably — such as by smiling or nodding.
“All of these elements add to the cognitive effort required to communicate in a noisy environment,” explains Lau.
Although the phenomenon takes its name from a cocktail party, there are many other noisy situations we encounter in everyday life — such as ordering coffee in a crowded café, listening to a teacher in a boisterous classroom, or asking for directions on a busy city street.
Implications and Practical Applications of the Findings
The researchers acknowledge that their study involved a relatively small number of participants, but they propose that the findings could help improve experiences for people who struggle in such environments. This might include solutions beyond standard hearing tests — for instance, seating certain students closer to the front of the classroom.
Previous research has explored ways to address this type of hearing difficulty and even linked it to dementia. However, the key insight from the new study is that hearing challenges don’t always share a single underlying cause.
“You don’t need to have hearing loss to struggle with listening in a restaurant or other noisy, real-world settings,” says Lau.
Read the original article on: Sciencealert
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