“…Considering these trends, it is perhaps surprising that evidence is mixed on whether life satisfaction shows an increasing, decreasing, or stable trend throughout adolescence. A declining-with-age trend is perhaps the dominant finding in the literature, and has been reported in early cross-sectional studies from Israel (Ullman & Tatar, 2001), South Korea (Park, 2005), Romania and Spain (Casas et al, 2013), and Germany (Goldbeck et al, 2007) and recent longitudinal studies from Spain (Aymerich et al, 2021;González-Carrasco et al, 2017, Hong Kong (Shek & Liang, 2018), and Algeria (Tiliouine et al, 2019). However, a cross-sectional study in the United States did not find a change in life satisfaction across grades 9-12 (Huebner et al, 2004).…”