Azizi - at the time of the research undertaken by the Opies in the early fifties the non-white population of most of the UK was very small indeed. Their research is unlikely to have been affected by children from non-white cultures. I think today the research they did would have included ethnic data. For your interest I add a quote from "Race, Immigration and Community Relations in Contemporary London" a paper from the LSE.


"In 1951, the UK's ethnic minority population (which would not have been referred to in these terms) is estimated to have been less than 50,000 . During the 1950s and 1960s, there was a significant growth in immigration from the New Commonwealth. By 1961, the number of London residents born in the 'New Commonwealth' was 242,000, providing a broad approximation of the overall level of the 'ethnic minority' population. This number grew to 583,000 by 1971 and 945,000 by 1981. The 'non-white' population in 1991 was about 1.4 million, increasing to about 2 million in 2001."

Stu