Andersson and Trudgill (1990)

• Attitudes towards accents are based more on social connotations and prejudices surrounding the location or social group associated with that accent than on the sound itself.
• American speakers who don't recognise a Brummie accent and know nothing about Birmingham, don't find it unpleasant at all. UK speakers have been shown to disagree.
• American speakers who recognise a London accent identify the sounds as highly attractive.