 Hey there, welcome to the video abstract for mapping measures of vocal reaction time, perceived task demand, and speech recognition to understand the benefits of on-demand processing in hearing aids. We know that understanding speech and noise remains difficult for hearing aid users. On-demand processing, when activated, prompts the hearing aid to classify the listening environment and apply additional specialized setting changes, which may improve user outcomes in realistic noisy scenarios. To understand the benefits of on-demand processing, we undertook the following study. We asked 21 experienced hearing aid users to repeat sentences presented in a noisy restaurant background, either with default hearing aid settings enabled or with on-demand processing enabled. The plot demonstrates how gain is changed in the on-demand condition compared to default settings. The three main outcomes were VRT or Vocal Reaction Time, a behavioral listening effort measurement with faster participant responses to stimuli indicating less cognitive resource consumption, perceived task demand, which was rated by participants after each condition, and speech understanding. We found that compared to the default settings, on-demand processing significantly decreased, that is, speeded up VRTs, decreased perceived task demand, and increased speech understanding. Here's a deeper dive into the results. Each circle represents one participant. Color illustrates perceived mental demand rating, speech data are plotted along the x-axis, and VRT data are plotted along the y-axis. Interestingly, changes in perceived task demand did not neatly map onto changes in VRT. In addition, some participants showed improved speech outcomes at a cost to cognitive resources. To summarize, while on-demand processing in realistic environments may provide broad benefits for listening effort and speech understanding in hearing aid users, these results support using a multiplicity of measures when evaluating outcomes to gain a fuller picture of each participant's listening experience. Thank you.