Prospective contributors also ask about the journal impact factor. The impact factor is given by the number of citations in a given year to articles published in the previous two years divided by the total number of articles published in the previous two years. Thus, the earliest Neurophotonics can expect an impact factor is in 2016, based on the papers published in 2014 and 2015. As the fields of research at the intersection of photonics and neuroscience are experiencing explosive growth, and neuroscience papers generally receive a high number of citations, we expect that Neurophotonics will have a respectable impact factor. That said, as is extensively discussed in the blogosphere, the importance of the impact factor is diminishing. Before online searching of databases was possible, scientists commonly found new journal articles by browsing hard copies of their favorite journals, and the impact factor provided a guide as to which journals were publishing the most impactful articles. Today, however, the need for this guide is diminished as online access to articles and searchable databases to find the articles of most interest has given scientists near-instant access to all published articles. The journal impact factor still remains a guide for determining which articles are likely to be more important. However, given how easy it is to determine the number of times individual articles are cited, it is likely that the article citation index will soon play a more important role for determining the actual impact of an article, rather than the journal impact factor.