From the press releases:
Findings show that on average, full-time college students study 15 hours a week. However, study time differed by academic majors, with seniors in engineering averaging about 19 hours per week, while their peers in the social sciences and business averaged five fewer hours per week.
Faculty expectations for study time by field corresponded closely to what students reported, but there were exceptions. Social sciences faculty, for example, expected four more hours per week than the average social sciences senior reported. Students who devoted at least 20 hours per week to studying did not always attend class fully prepared.
These findings, released by the National Survey of Student Engagement (NSSE), raise questions about areas where a mismatch may exist between the work asked of students and what they believe necessary to succeed, and also whether faculty expectations for study time may need to be recalibrated.
Note that 2012 will be the last year of the current survey. At some point even the best surveys must be revised and updated, affecting multi-year analyses such as trend studies or pre-post designs. Many measures on the current survey, including benchmarks and individual survey items, are likely to change in 2013. This means trend lines will be interrupted and multi-year results will be less comparable across the two versions.