We provide a web version of the adaptive Coordinate Response Measure (CRM) task (Bolia, Nelson, Ericson, & Simpson, 2000) introduced by Messaoud-Galusi, Hazan, & Rosen (2011) to measure speech reception ability.
We provide also a version WITH MONETARY BONUS. We have shown that a monetary reward based on performance improved listeners’ threshold up to levels similar to those observed in the lab setting (Bianco et al., 2021).
Participants are instructed to attend to a target voice while ignoring a speech-babble masker. The overall level of the mixture (target voice + babble masker) is kept fixed, with only the ratio between the target and masker changing on each trial.
Users can select babble or noise maskers, 1 or 3 speakers for the target voice, and multiple runs. One run takes approximately 2 minutes.
The code was developed by Gordon Mills as part of a project funded by the NIHR UCLH BRC Deafness and Hearing Problems Theme.
Built with Code Editor
We have shown that a monetary reward based on performance improved listeners’ threshold up to levels similar to those observed in the lab setting.
To collect accurate speech in noise threshold we used 4 runs (1 for practice and 3 for test). The signal to noise ratio (SNR) between the babble and the target speaker is initially set to 20dB and adjusted using a one-up one-down adaptive procedure, tracking the 50% correct threshold (Levitt, 1971). After each run, the achieved threshold is displayed and participants are challenged to try to ‘beat their score’ in the next run. The participants are informed that each threshold is associated with a monetary bonus, and that at the end of the experiment they will receive the bonus associated with the best threshold reached. The bonus is preassigned to SNR values from -1 to -28 (in step of 1) through an exponential function, so that improvements at lower, more difficult thresholds are rewarded more than improvements at levels expected to be easily reached by young healthy listeners. The average obtainable bonus is set to £2 (range £ 0-5).
Creative Commons Attribution (CC BY)
Built with Code Editor
Fully open! Access by URL and searchable from the Open Materials search page
