Lidberg L
Acta Psychiatr Scand. 1976 Aug;54(2):125-30. doi: 10.1111/j.1600-0447.1976.tb00104.x.
In patients with psychosexual disturbances (impotence and ejaculatio praecox) the family constellation during childhood and the patients' occupations were compared with the Swedish population census. The parents of the patients were older, and the patients were more often the only son or the only child. A greater percentage of the patients had technical or office administrative professions than the inhabitants in Stockholm. The findings are discussed with references to a supposed focus on achievement in the upbringing of the oldest or only son. Focus on achievement may cause emotional restraint and subsequently psychosexual disturbances.
对患有性心理障碍（阳痿和早泄）的患者，将其童年时期的家庭格局及职业与瑞典人口普查数据进行了比较。患者的父母年龄较大，而且患者更多是独子或独生子女。与斯德哥尔摩的居民相比，从事技术或办公室行政职业的患者比例更高。研究结果结合了在抚养长子或独子时假定的对成就的关注进行了讨论。对成就的关注可能导致情感抑制，进而引发性心理障碍。
