Although same-language subtitles and captions are produced primarily with the deaf and hard-of-hearing in mind, they may also be used to ensure understanding of dialogue (such as those spoken quietly or mixed in with sound effects, by those with accents unfamiliar to the intended audience, or supportive dialogue from background or off-screen characters). Jason Kehe of "Wired" noted that habitual use of subtitles by the non-deaf has been a growing trend for these reasons, and to help pick up on additional details and information found within dialogue. He drew comparisons to the ubiquity of search engines by stating that "just like Google, closed captions are there, eminently accessible, ready to clarify the unclarities, and so, desperately, we, the paranoids and obsessive-compulsives and postmodern completists, click." Studies (including those by the University of Nottingham and the What Works Clearinghouse of the United States Department of Education) have found that use of subtitles can help promote reading comprehension in school-aged children.