Abstract
The shift from print to screen as the dominant reading medium of daily life is one of the largest changes in the practice of reading in the history of the skill. It has happened within a single generation, and it has happened so quickly that its consequences are only now beginning to be understood. This paper surveys the emerging evidence that reading on screens, particularly the kind of brief, scanned, hyperlinked, and interrupted reading that characterizes most screen use, produces different neural and behavioral patterns than the sustained reading of printed texts. It considers what is known about the effects of habitual screen reading on comprehension, retention, attention, and the capacity for deep reading, and it draws out implications for instruction, for families, and for any reader who hopes to preserve the capacities that serious reading requires. The central claim is that the reading brain is plastic throughout life, that it takes the shape of what it habitually does, and that the habits formed by screen reading are not neutral with respect to the habits required for deep reading. This is not a lament. It is an observation with practical consequences, and taking it seriously means taking seriously what we let our reading practices do to us.
1. Introduction
Earlier papers in this series have argued that the reading brain is built, that each level of reading proficiency engages the brain in characteristic ways, and that the neural signatures of reading expertise are produced by sustained practice at the relevant level of reading. This paper takes up a further implication. If the reading brain takes the shape of what it does, then the question of what the reading brain is doing, most of the time, in the life of a contemporary reader, becomes a question of some importance. And the answer, for most contemporary readers, is that it is doing screen reading.
The quantities involved are striking. The average adult in a developed country now spends several hours each day looking at text on a screen of some kind, and in many cases the total approaches or exceeds the total time spent in any other activity except sleep. The majority of this screen time involves some form of reading: email, text messages, social media posts, news feeds, search results, articles of varying length, and the incidental text that accompanies almost every digital environment. The sustained reading of printed books, by contrast, occupies a small and shrinking fraction of daily reading time for most adults, and for many young people it has become rare enough that its absence is itself the norm.
This shift has not been neutral with respect to the skills and habits involved in reading. Reading on screens, as it is typically practiced, differs from reading on paper in ways that are behaviorally significant and neurally detectable. The consequences for the developing reader, and for the maintenance of reading capacities in adults, are the subject of the present paper.
2. The Plastic Brain and the Reading Life
The central premise of this paper is that the human brain is plastic throughout life. Cortical regions take the functional shape that sustained practice gives them, white-matter tracts strengthen or weaken in proportion to their use, and the functional networks that support particular cognitive activities consolidate with practice and attenuate with neglect. This is as true at sixty as at six, though the rate of change is slower. The brain that is used intensively for one kind of task becomes better at that task, and in becoming better at that task, it becomes configured for that task. It does not remain equally prepared for other tasks that it is no longer practicing.
The earlier papers in this series have documented this plasticity at several stages of the reading life. The Visual Word Form Area is built by sustained practice in decoding. The comprehension network is built by sustained practice in reading for understanding. The analytical and syntopical capacities are built by sustained practice in close and comparative reading. In each case, the brain acquires what it is regularly asked to acquire, and the acquisition is maintained only so long as the practice is maintained.
This principle cuts both ways. A brain that is habitually engaged in sustained deep reading becomes, and remains, a brain that is good at sustained deep reading. A brain that is habitually engaged in brief, scanning, interrupted reading becomes, and remains, a brain that is good at brief, scanning, interrupted reading. These are not the same brain, and the difference between them matters for what each is capable of when confronted with a demanding text.
3. What Screen Reading Typically Is
The phrase “screen reading” is used here to designate not any particular screen but the characteristic reading practices that screens typically afford. It is worth being precise about what these practices are, because the differences between screen reading and print reading are not primarily a matter of pixels versus ink but a matter of the cognitive and behavioral patterns that each medium tends to produce.
Screen reading, as it is typically practiced, is brief. The average screen reading episode lasts well under a minute, and many episodes last a few seconds. Screen reading is interrupted. Notifications, competing windows, hyperlinks, and the presence of other applications a click away ensure that a sustained period of attention to a single text is difficult to maintain and, for many screen readers, rarely attempted. Screen reading is scanning. Research on how people read web pages has shown that the typical pattern is not the linear reading of a text from beginning to end but a rapid scan in which the eye jumps to headings, early words of paragraphs, and visually salient terms, with much of the intervening text skipped entirely. Screen reading is hyperlinked. The reader is frequently offered the option to leave the current text for another, and the offer is frequently accepted, producing a branching rather than a linear progression through the material. Screen reading is shallow, not necessarily by choice but because the combination of brevity, interruption, scanning, and hyperlinking makes sustained engagement with a single text’s argument and structure difficult to achieve.
Not all screen reading has all of these features. An adult reading a long-form article on a tablet with notifications turned off is doing something more like print reading than like typical screen reading. But the typical pattern is the one just described, and it is the pattern that most screen readers spend most of their reading time practicing.
Print reading, by contrast, is characteristically longer in duration, unbroken by external interruptions, linear rather than branching, and conducive to sustained engagement with a text’s argument and structure. This is not because print is magical but because the physical form of a printed book does not afford interruption, does not offer hyperlinks, and does not invite the rapid scanning that screens invite. The medium does not determine how a reader reads, but it powerfully shapes what the reader typically does.
4. Comprehension and Retention: What the Evidence Shows
A growing body of research compares comprehension and retention between reading on screens and reading on paper, generally using the same texts presented in the two media and testing readers afterward on what they have understood and what they remember. The findings are not entirely uniform, but the general trend is clear enough to report.
For short texts of modest difficulty, differences between screen and paper reading are often small or absent. Readers perform similarly on comprehension measures regardless of medium when the text is brief and the content straightforward. This is an important qualification. The differences that emerge are not general artifacts of the screen as a visual display.
For longer texts, and for texts of greater difficulty, a consistent screen disadvantage appears. Readers who read demanding texts on screens tend to comprehend them less thoroughly and to retain less of their content than readers who read the same texts on paper. The effect is modest in any single study but robust across studies, and it is particularly strong for the kinds of reading that require integration across longer passages—following an extended argument, tracking the relations among multiple characters or claims, reconstructing the structure of a piece of writing as a whole. These are precisely the demands that analytical reading imposes, and the screen disadvantage is strongest exactly where analytical demands are highest.
Researchers have proposed several explanations for this pattern. One is that screens afford a more superficial mode of reading, and readers on screens tend to adopt that mode even when the text would reward a more careful approach. Another is that the physical presence of a book—its pages, its spatial layout, the tactile cues that distinguish where in the book one is—supports memory and integration in ways that a scrolling or paginated screen does not. A third is that screens, even when used thoughtfully, bring with them expectations and habits developed through their more typical uses, and those expectations color the reading experience regardless of the immediate text. Probably all three factors contribute, along with others less well understood.
The practical implication is straightforward. For short, simple reading, medium makes little difference. For the kind of reading that builds and exercises the deep-reading capacities, paper has measurable advantages, and the advantages appear to compound over time as habits of deep engagement with texts are formed or neglected.
5. Attention: What Screens Do to the Capacity for Sustained Focus
A second body of research bears on what habitual screen use, including screen reading, does to the capacity for sustained attention. The evidence here comes from several sources: studies of attention in heavy and light screen users, research on multitasking and its effects on cognitive performance, and longitudinal research on children and adolescents who have grown up with substantial screen exposure.
The general picture that has emerged is that habitual screen use, particularly when it involves frequent switching among tasks and frequent exposure to interruption, is associated with measurable changes in the capacity for sustained attention. Heavy screen users show, on average, shorter sustained attention to any single task, greater difficulty resisting the pull of available distractions, and reduced performance on tasks that require prolonged concentration. These findings are correlational in many studies and experimental in some, and the experimental work suggests that the relationship is causal in at least some direction: training the brain to attend briefly and to switch frequently produces a brain that attends briefly and switches frequently.
For reading, the consequences are direct. Deep reading, of the analytical and syntopical sort that earlier papers have described, requires sustained attention for extended periods. A reader who cannot sit with a text for twenty or thirty minutes without feeling the pull to check a screen, start another task, or leap to a different text is a reader for whom deep reading has become difficult or impossible, regardless of his underlying intellectual capacity. The capacity for deep reading rests on the capacity for sustained attention, and the capacity for sustained attention is eroded by habitual engagement with media designed to fragment it.
This is not a matter of moral failure on the part of the reader. It is a matter of what the plastic brain does when it is placed in an environment of ubiquitous interruption and fragmentation. The brain adapts to that environment, and the adaptations are not congenial to deep reading.
The children and adolescents now growing up with screens as their default reading environment are a particular concern in this regard. The habits of attention are formed early, and a reader whose formative years have been spent in brief, interrupted, scanning engagement with text may find, when he later tries to read a demanding book, that the capacity for the sustained engagement such a book requires was never built. The analytical and syntopical capacities rest on a foundation of sustained attention that must be developed, and it is not obvious that a childhood saturated with fragmentary screen reading builds that foundation.
6. Neural Signatures: What the Imaging Studies Suggest
Direct neuroimaging of screen versus paper reading is a relatively new area, and the findings must be held with some tentativeness. But several observations have emerged.
Some studies have found that screen reading, particularly the brief scanning characteristic of web use, engages a somewhat different pattern of neural activation than the sustained reading of printed texts. The differences involve regions associated with rapid decision-making, stimulus evaluation, and attentional switching—regions that are heavily engaged when the reader must quickly assess whether a given item on a page is worth attending to and whether to follow a hyperlink to another item. This is consistent with the behavioral picture of screen reading as oriented toward rapid evaluation and navigation rather than toward sustained comprehension.
Research on heavy internet users has found differences in the structural and functional organization of regions involved in attention and executive control, with heavy users showing patterns that resemble, to some extent, those seen in other forms of attentional dysregulation. The interpretation of these findings is contested, and the causal direction is not always clear, but the accumulating evidence suggests that the brain is indeed being reshaped by heavy screen use, and that the reshaping is not confined to reading-specific regions.
Of particular interest for the present paper are findings suggesting that the deep-reading network—the comprehension, mentalizing, integration, and attention systems that earlier papers have described as the neural basis of analytical and syntopical reading—is less strongly engaged during typical screen reading than during the reading of equivalent printed texts. When a reader scans a web page, the deep-reading network is not exercised in the way it would be by the sustained engagement with a printed page. Over time, and with the accumulation of hours of screen reading at the expense of deep reading, the deep-reading network may receive less exercise than it needs to develop fully in young readers or to maintain itself in older ones.
None of this should be overstated. The research is at an early stage, and the effect sizes in any single study are modest. But the convergence across studies, taken together with the behavioral findings on comprehension and attention, supports a picture in which habitual screen reading and habitual deep reading produce neurally distinct adaptations, and in which the former does not serve as a substitute for the latter.
7. What About Audiobooks and Assistive Reading?
A brief digression is warranted on the question of audiobooks and other non-visual forms of engagement with texts. Audiobooks are not screen reading, and they are not print reading. They are a form of listening to text. The research suggests that comprehension of well-produced audiobooks is reasonably good for many kinds of material, particularly narrative, and that audiobooks can support the development of vocabulary, background knowledge, and the habit of sustained engagement with extended content. At the same time, audiobooks do not build the Visual Word Form Area, do not exercise the decoding and orthographic skills that reading develops, and do not permit the deliberate rereading, pausing, and marking that analytical reading requires.
Audiobooks are therefore best thought of as a supplement to reading rather than a replacement for it, and particularly as a supplement for those whose schedules do not permit as much sustained reading as they would wish. They may be especially valuable for building the oral vocabulary and narrative comprehension capacities discussed in an earlier paper, and they offer a genuine means of engaging with texts that might otherwise go unread. But they do not do what deep reading of printed texts does, and they should not be mistaken for an equivalent.
Similar considerations apply to assistive reading technologies for those with genuine reading difficulties. Such technologies serve a real purpose and may be indispensable in particular cases. Their use by those with significant reading difficulties is to be commended, not discouraged. But they do not substitute, for readers who are capable of deep reading, for the practice of deep reading itself.
8. Implications for Instruction and for Families
The findings surveyed in this paper have several practical implications.
First, the instructional foundations of reading, including the development of the capacities for sustained attention and deep engagement with texts, should be built primarily on printed texts. A child who learns to read primarily on screens, and whose reading practice is primarily on screens, is likely to develop the patterns of engagement that screens afford. These patterns are not the patterns required for analytical and syntopical reading. The deep reading capacities are best built on the medium that supports deep reading, and the evidence points to printed books, with their physical continuity, their freedom from interruption, and their invitation to sustained engagement, as that medium.
Second, the habits formed in childhood are particularly important. Screens are here to stay, and no one is proposing that children be raised in ignorance of them. But the balance of a child’s reading life is a legitimate concern of parents and teachers, and a balance that is heavily tilted toward screen reading, even when the screen reading is educational in content, may produce a reader whose capacity for deep engagement with demanding texts is never fully built. A childhood in which books are central and screens are peripheral is likely to produce a different kind of reader, and a different kind of brain, than a childhood in which the proportions are reversed.
Third, adults who wish to maintain or recover the capacity for deep reading must take deliberate steps to do so. The environment does not support deep reading by default; the default is brief, interrupted, fragmented engagement with text, and any adult who wishes to read seriously must construct the conditions for serious reading against the grain of the environment. This means setting aside time and space for sustained reading, removing or silencing the sources of interruption, choosing texts worthy of sustained engagement, and treating deep reading as a practice that requires effort and protection rather than as a default activity that simply happens.
Fourth, the texts that most repay deep reading remain available and, in many cases, uniquely suited to the medium of print. Scripture, above all, rewards sustained, unhurried, deep engagement, and generations of serious readers have found that engagement cultivated by the book in the hand in a way that is not easily replicated by the same text on a phone. This is not a mystical claim about the sanctity of paper. It is a practical observation about what kind of engagement the respective media tend to produce. A person who wishes to read Scripture deeply, or the great works of theology and reflection that attend it, will generally find the work easier with a printed book and the screen set aside.
Fifth, the discipline of deep reading is itself formative. A reader who practices deep reading, against the grain of a distracted environment, builds not only the neural capacities for deep reading but the habits of attention, patience, and sustained thought that extend well beyond reading. The stakes are therefore larger than reading itself. The plastic brain is taking some shape in response to our habits. What shape it takes, over a lifetime, depends on what we spend our time doing, and the reading life is a substantial portion of the intellectual life for anyone who takes thought seriously.
9. A Word on Proportion
The case made in this paper is that screen reading and deep reading are not the same thing and that the former does not substitute for the latter. The case is not that screens are evil or that all screen reading should be avoided. Screens are useful, sometimes indispensable, and many of the texts that matter are now available only in digital form. An absolutist rejection of screen reading is neither realistic nor necessary.
What is necessary is proportion, and proportion informed by an understanding of what each medium tends to produce. A reading life that includes extensive screen reading for communication, for brief reference, and for material that does not reward deep engagement, and that reserves substantial time for sustained reading of printed texts that do reward deep engagement, is a reading life well matched to the realities of the moment. A reading life in which screen reading has displaced deep reading entirely is a reading life in which the capacities for serious intellectual engagement with texts are being lost, quietly and without fanfare, to the brain’s adaptation to what it is actually spending its time doing.
The question each reader faces is not whether to use screens but whether to let the proportion of screen reading to deep reading take the shape it takes by default, or to establish a different proportion by deliberate choice. The plastic brain will take some shape. The only question is whether that shape is chosen or accepted.
10. Conclusion
The reading brain is plastic throughout life. It takes the shape of what it habitually does. Screen reading, as it is typically practiced, produces different neural and behavioral patterns than the sustained reading of printed texts, and the differences matter for the capacities that deep reading requires. The comprehension and retention advantages of print for demanding material, the erosion of sustained attention by habitual engagement with fragmenting media, and the emerging evidence of differential neural engagement during screen and print reading converge on a single practical conclusion: the deep-reading capacities are built and maintained by deep-reading practice, and the habits formed in the ordinary environment of contemporary life are not, by default, the habits that build them.
This is not a counsel of despair. The plastic brain is not plastic only in one direction. The reader who establishes deep-reading habits will find, with time, that the habits become easier, that the texts that once felt inaccessible become accessible, and that the capacity for the kind of reading that matters is available to him in a way it was not before. The work of building a reader does not end with childhood instruction, and the work of maintaining a reader does not end with the acquisition of fluency. Each reading life takes the shape its reader gives it, and the shape a reader gives his reading life is among the most consequential choices he will make.

John ElliottPresident, United Church of God