- Belgium
- Hlava and Kopecky, 2013; Muys, 2013
- Canada
- Reynolds, 1995; British Columbia: Reynolds, 1995; Quebec: Reynolds, 1975d, 1975e, 1976c; Reynolds and Reynolds, 1992
- Czech Republic
- Zeithaml et al., 2009
- Denmark
- Blakemore, 2007
- Estonia
- Ivask et al., 2012
- Finland
- Blakemore, 2007
- France
- Bouche, 1972
- Germany
- Jansch et al., 2013
- Iceland
- Sigurdardottir, 2000; Blakemore, 2007b
- Latvia
- Ventins, 2011, 2011c
- New Zealand
- Lee, 1959
- Norway
- Sveistrup et al., 1997; Bakken et al., 2006; Blakemore, 2007.Pommeresche et al., 2009b.
- Poland
- Kasprzak, 1989
- Romania
- Pop, 2012.
- Russia
- Perel, 1979; Perel-Vsevolodova, 1997; Blakemore, 2007c
- Spain
- Diaz Cosin et al., 1992
- Sweden
- Blakemore, 2007
- The Netherlands
- Zorn et al., 2005c
- United Kingdom
- Sims and Gerard, 1999; Scotland: Carpenter, 2011
- United States
- Reynolds, 1995; Alaska: Bowser et al., 2013
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Data are not exhaustive. The database is permanently a work in progress.