The Outgroup Prejudice Index is a six-item scale that uses social distance to assess prejudice towards ethnic and religious out groups among Asians and Whites. It was developed among a sample of 2982 teenagers attending schools in northern England who indicated their religion as either ‘Muslim’, ‘Christian’ or ‘no religion’. The scale demonstrated internal consistency reliability among both Asian (Cronbach’s alpha = .78) and White (Cronbach’s alpha = .85) pupils. The scale demonstrated construct validity in two ways: scores were correlated with a second scale based on stereotyped attitudes, and were also lower among those with friends in outgroups, suggesting the index was a valid measure of ethnic or religious outgroup prejudice
