The BFLPE has been intensely studied across different countries, cultural contexts, and school systems, and it appears to be generalizable across each. In fact, it has been so generalizable that Marjorie Seaton referred to it as a panhuman theory. The BFLPE appears to be generalizable across most age groups too. Roy, Guy, and Valois (2015) showed the BFLPE in a group of 8 to 12-year-old students. Marsh and Hau (2003) found the effect in 26 different countries, thus demonstrating the cross-cultural generalizability of the effect. The countries were: Australia, Austria, Belgium, Brazil, Czech Republic, Denmark, Finland, Germany, Hungary, Iceland, Ireland, Italy, Korea, Latvia, Liechtenstein, Luxembourg, Mexico, Netherlands, New Zealand, Norway, Portugal, Russia, Sweden, Switzerland, United Kingdom, and United States.