Well, I did the paper in 2004 and if I remember correctly it was a fairly recent article at the time. I went to the Christian Science Monitor website and tried to track it down, but to no avail. Maybe if I spend some real time looking for it I might find it, but not today.
Either way, the findings were that homosexuality isn't a choice.
By APA standards, neither is homosexuality a mental disorder. The definition of a disorder is long so to read about what it says in the DSM IV:
Psychology - Google Books (This isn't the DSM IV but the definition is quoated from the DSM IV).
Were homosexuality a mental disorder, would we still want to relegate those with this disorder to second class citizens? Like people with mild forms of Down's Syndrome or Autism who can still function in regular society, but without the right to marry the consenting adult they love and with whom they are in a committed relationship amd without the rights and benefits that straight married couples enjoy and are extended by the government. And if it were a mental disorder, then homosexuals will be protected by the Americans with Disabilities Act so you better watch out if that's your point. They'll get their own restrooms, you won't be able to fire them, they'll be covered by Affirmative Action, and they might be able to take their case to the SCOTUS and win the right to marry from that angle.