Preschool children often confuse letters with their mirror images when they try to read and write. Mirror confusion seems to occur more often in line with the direction of script (e.g., left-to-right for the Latin alphabetic script), suggesting that the processing of letter orientation and text directionality may be interrelated in preliterate…

In this article, I illustrate how research from cognitive science and the science of reading can inform research on the science of reading instruction. This purpose is accomplished by focusing on four recently published randomized control trials of instruction designed to teach alphabet letters to 3- and 4-year-old children (N = 342) attending…

Discrimination of reversible mirrored letters (e.g., d and b) poses a challenge when learning to read as it requires overcoming "mirror invariance," an evolutionary-old perceptual tendency of processing mirror images as equivalent. The present study investigated "when," in reading development, mirror-image discrimination…