A Preliminary Report on an Adaptive Word-Recognition Protocol That Generates Word-Recognition Functions

Area of Science:

• Audiology
• Speech perception research
• Hearing diagnostics

Background:

• Auditory system functions include environmental monitoring and oral/auditory communication.
• Traditional word-recognition tests are time-consuming and offer limited speech perception data.
• Current evaluations often use a single word list at a suprathreshold level, neglecting a broad range of speech audibility.

Purpose of the Study:

• To develop and validate an adaptive, software-controlled word-recognition protocol.
• To assess word-recognition performance across a range of 40 to 60 dB hearing level (HL).
• To confirm the assumption that correctly recognized words remain recognizable at subsequent higher presentation levels in an ascending paradigm.

Main Methods:

• A quasi-experimental repeated measures design was employed.
• Twenty-four young adults with normal hearing thresholds participated in two experiments.
• An adaptive protocol presented monosyllabic word lists, recording correct/incorrect responses and analyzing data using polynomial equations.

Main Results:

• Raw and assumed data yielded virtually identical word-recognition functions in Experiment 1.
• The adaptive protocol in Experiment 2 produced comparable word-recognition functions to Experiment 1.
• Word-recognition thresholds ranged from 9.2 to 30.3 dB HL, with a weak correlation to word amplitude.

Conclusions:

• The study validated the core assumption for the adaptive protocol, supporting its use in clinical audiology.
• The developed adaptive protocol efficiently provides reliable speech perception data comparable to traditional methods.
• This protocol and its underlying assumption are crucial for documenting the performance of patients with sensorineural hearing loss.