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I can see not being able to complete and submit a paper solely on the iPad.

Mr. Lanier’s book, which makes an impassioned case for “a digital humanism,” is only one of many recent volumes to take a hard but judicious look at some of the consequences of new technology and Web 2.0. Among them are several prescient books by Cass Sunstein, 55, which explore the effects of the Internet on public discourse; Farhad Manjoo’s “True Enough,” which examines how new technologies are promoting the cultural ascendancy of belief over fact; “The Cult of the Amateur,” by Andrew Keen, which argues that Web 2.0 is creating a “digital forest of mediocrity” and substituting ill-informed speculation for genuine expertise; and Nicholas Carr’s book “The Shallows” (coming in June), which suggests that increased Internet use is rewiring our brains, impairing our ability to think deeply and creatively even as it improves our ability to multitask.

Steven Johnson, a founder of the online magazine Feed, for instance, wrote in an article in The Wall Street Journal last year that with the development of software for Amazon.com’s Kindle and other e-book readers that enable users to jump back and forth from other applications, he fears “one of the great joys of book reading — the total immersion in another world, or in the world of the author’s ideas — will be compromised.” He continued, “We all may read books the way we increasingly read magazines and newspapers: a little bit here, a little bit there.”

Increasingly, undergraduates are not prepared adequately in any academic area but often arrive with strong convictions about their abilities.

It has become difficult to give students honest feedback.

As the college-age population declines, many tuition-driven institutions struggle to find enough paying customers to balance their budgets. That makes it necessary to recruit even more unprepared students, who then must be retained, shifting the burden for academic success away from the student and on to the teacher.

Although a lot of emphasis is placed on research on the tenure track, most faculty members are not on that track and are retained on the basis of what students think of them.

Students gravitate to lenient professors and to courses that are reputedly easy, particularly in general education.

It is impossible to maintain high expectations for long unless everyone holds the line in all comparable courses—and we face strong incentives not to do that.

Formerly, full-time, tenured faculty members with terminal degrees and long-term ties to the institution did most of the teaching. Such faculty members not only were free to grade honestly and teach with conviction but also had a deep understanding of the curriculum, their colleagues, and the institutional mission. Now undergraduate teaching relies primarily on graduate students and transient, part-time instructors on short-term contracts who teach at multiple institutions and whose performance is judged almost entirely by student-satisfaction surveys.

Contingent faculty members, who are paid so little, routinely teach course loads that are impossible to sustain without cutting a lot of corners.

Many colleges are now so packed with transient teachers, and multitasking faculty-administrators, that it is impossible to maintain some kind of logical development in the sequencing of courses.

Students may be enjoying high self-esteem, but college teachers seem to be suffering from a lack of self-confidence.

Fluid intelligence

Crystallized intelligence