Studies of this type has been going on since the 1970's. They typically include children between age 3 to early adulthood, but some studies have investigated adult (ie in their 20's or 30's) children to gay parents. "Long term" in the case fo psychology studies, usually means several years, as opposed to short term which ia few months or so. Like Nippy points out, when a person leaves home and starts its own life, the parents influence decreases and other factors play a larger and larger role, so it is regarded as a high priority to investigate further after this point. However, longitudinal studies when you follow people over many, many years (we have one in Sweden on a group that is not over 40 years old) would be very interesting to carry out and I hope we will see more such studies in the future. A problem with longitudinal studies is that they are very expensive and difficult to administrate since people often quit participation in the studies becasue they move or just get fed up with being "human guniea pigs".Originally posted by Sailor Saturn
I'm interested in knowing more about these studies. How long is "long-term"? How much diversity in the specific types of people observed for the studies was there? How long have these studies been going on? Even if they've been going on for 20 years, I wonder if that's really enough time to know anything relevant enough to predict what's likely to happen in the next 30-40 years of their life. How much was the social situation taken into consideration(i.e., interaction with peers at school, etc)? While parents play a large role, there's a lot more that affects a child's development than just the parents she has.
A majority of the studies have focused on children to lesbian mothers, which is a lack. However, the fewer studies of children to gay fathers show no differences compared to non-gay fathers. Studies include both single gay parents and gay couples.
Many studies has included investigations of the social situation of the child, since one of the hypothesised risks with having gay parents was that the child would suffer socially. There has so far not been any support for this hypothesis, instead, children to gay parents do not differ from other children in popularity, peer-relations, school functioning and other social measures.
The American Psychological Association, APA, has made a compilation of the results of some 50 studies. It's free on the net, and includes many references at the end of the text.
http://www.apa.org/pi/parent.html
Here is a review article:
http://www.ibiblio.org/gaylaw/issue6/Mcneill.htm
Some few hundred studies have been carried out since the 1970's, and that is not very much in a scientific perspective. From these studies, it can be concluded that there are no differences between children to gay or straight parents in cognitive functioning, psychosocial functioning, sexual identity, peer-relations, school functioning, emotional measures, psychiatric disorders etc, etc., just as there is no differences between children living with single parents or two parents.