A method for determining hearing sensitivity in infants: the interweaving staircase procedure (ISP)

Area of Science:

• Audiology
• Pediatric audiology
• Hearing science

Background:

• Infant hearing screening is crucial for early detection of hearing loss.
• Accurate hearing threshold determination in infants presents unique challenges.
• Existing methods may be limited by infant attention and motivation variability.

Purpose of the Study:

• To develop and validate a computer-assisted adaptive procedure for infant hearing threshold acquisition.
• To ensure consistent motivation and attention across multiple test frequencies.
• To provide a reliable method for assessing hearing sensitivity in young children.

Main Methods:

• Utilized a visually-reinforced head turn procedure.
• Employed an adaptive (staircase) threshold acquisition procedure (the ISP).
• Obtained thresholds at three frequencies using independent and concurrent staircases with random trial selection.
• Incorporated Probe and Catch trials for continuous monitoring of motivation and attention.

Main Results:

• The ISP successfully determined hearing sensitivity thresholds in infants.
• Concurrent staircases maintained consistent motivation and attention across frequencies.
• Adaptive adjustments based on trial-by-trial history compensated for motivation/attention changes.

Conclusions:

• The computer-assisted adaptive procedure (ISP) is an effective tool for infant hearing assessment.
• This method offers reliable and consistent hearing threshold measurements in infants.
• The ISP enhances the accuracy of pediatric audiological evaluations.