A third potential limitation is that the relative frequencies of topics in JAP and PPsych may be affected by the launching of specialized journals. We examined several such journals (e.g., Human Factors, Leadership Quarterly, Organizational Research Methods), and our conclusion is that it is by no means clear that the launching of specialized journals has affected our main conclusions in a substantive way. For example, Tables 1 and 2 show that the decrease in interest in leadership dates to the late 1970s and early 1980s, although Leadership Quarterly was not launched until 1990. Hence, there is a possibility that the launching of specialized journals may have affected what is submitted and accepted by JAP and PPsych, but there is no clear evidence that the launching of these journals has affected our study’s main conclusions.