Embedded hyperlinks in documents or Internet pages have been found to make different demands on the reader than traditional text. Authors, such as Nicholas Carr, and psychologists, such as Maryanne Wolf, contend that the internet may have a negative impact on attention and reading comprehension. Some studies report increased demands of reading hyperlinked text in terms of cognitive load, or the amount of information actively maintained in one's mind (also see working memory). One study showed that going from about 5 hyperlinks per page to about 11 per page reduced college students’ understanding (assessed by multiple choice tests) of articles about alternative energy. This can be attributed to the decision-making process (deciding whether to click on it) required by each hyperlink, which may reduce comprehension of surrounding text.