PT - JOURNAL ARTICLE AU - Jason D. Yeatman AU - Kenny An Tang AU - Patrick M. Donnelly AU - Maya Yablonski AU - Mahalakshmi Ramamurthy AU - Iliana I. Karipidis AU - Sendy Caffarra AU - Megumi E. Takada AU - Klint Kanopka AU - Michal Ben-Shachar AU - Benjamin W. Domingue TI - Rapid Online Assessment of Reading Ability AID - 10.1101/2020.07.30.229658 DP - 2021 Jan 01 TA - bioRxiv PG - 2020.07.30.229658 4099 - http://biorxiv.org/content/early/2021/01/11/2020.07.30.229658.short 4100 - http://biorxiv.org/content/early/2021/01/11/2020.07.30.229658.full AB - An accurate model of the factors that contribute to individual differences in reading ability depends on data collection in large, diverse and representative samples of research participants. However, that is rarely feasible due to the constraints imposed by standardized measures of reading ability which require test administration by trained clinicians or researchers. Here we explore whether a simple, two-alternative forced choice, time limited lexical decision task (LDT), self-delivered through the web-browser, can serve as an accurate and reliable measure of reading ability. We found that performance on the LDT is highly correlated with scores on standardized measures of reading ability such as the Woodcock-Johnson Letter Word Identification test (r = 0.91, disattenuated r = 0.94). Importantly, the LDT reading ability measure is highly reliable (r = 0.97). After optimizing the list of words and pseudowords based on item response theory, we found that a short experiment with 76 trials (2-3 minutes) provides a reliable (r = 0.95) measure of reading ability. Thus, the self-administered, Rapid Online Assessment of Reading ability (ROAR) developed here overcomes the constraints of resource-intensive, in-person reading assessment, and provides an efficient and automated tool for effective online research into the mechanisms of reading (dis)ability.Competing Interest StatementThe authors have declared no competing interest.