Average adult reading speed in English is typically cited as 200-250 words per minute for general comprehension, a figure derived from multiple studies across educational and workplace contexts. The most widely cited baseline comes from a 1956 study by researchers at Carnegie Mellon; subsequent work has largely confirmed the range, with college students averaging 250-300 wpm and professional adults somewhat higher depending on material familiarity. Oral reading is universally slower than silent reading — typically 130-180 wpm — constrained by the mechanical limits of speech production. This is why recorded audiobooks are paced at 150-160 wpm and Audible's 2x speed (300-320 wpm) represents the upper bound of comfortable audio comprehension for most listeners.

Speed reading programs claiming 1,000-3,000+ wpm have been scientifically debunked. A landmark 2016 paper in Psychological Science in the Public Interest by Keith Rayner and colleagues reviewed decades of eye movement research and concluded that rapid serial visual presentation (RSVP) — displaying one word at a time at high speed — reduces comprehension to near-zero for complex material because the eye's peripheral vision cannot preview upcoming text for syntactic parsing. The visual span of useful text recognition during each eye fixation is approximately 7-8 characters to the right and 3-4 to the left, and this biological constraint limits sustainable reading speed with comprehension to roughly 400-500 wpm maximum for most people.

Reading speed varies dramatically by text type and reader expertise. A domain expert reads their specialty literature significantly faster than a novice because familiar vocabulary and conceptual schemas reduce the cognitive processing required per word — the brain predicts upcoming content and confirms rather than fully decodes. A physicist reading a physics paper effectively 'skips' words they can predict; the same physicist reads a legal document slowly because every term requires full processing. This expertise effect explains why recommendations to 'read more in your field' improve both reading speed and comprehension simultaneously — each book builds the predictive schema that accelerates the next.

Digital vs. print reading has been the subject of extensive research, particularly following the smartphone era. A 2018 meta-analysis by Pablo Delgado and colleagues found consistent evidence of a 'screen inferiority effect' — comprehension and retention are measurably lower for screen reading than print in studies where reading conditions are otherwise controlled. The proposed mechanisms include lower metacognitive vigilance (people monitor their understanding less carefully on screens), more skimming behavior triggered by hyperlinks and notifications, and possible differences in spatial navigation of text (print books provide physical position cues that aid memory for location of information). E-ink readers like Kindle show smaller deficits than backlit LCD screens.