Survey response rates refer to the proportion of people invited to take part in a survey who actually go on to complete it. The response rate is not the same as an Incidence Rate (the proportion of a population who meet required targeting criteria and could participate) or the Strike Rate (the number of interviews completed in a set time period e.g. per hour).
Response rates differ significantly across market research surveys and can range from less than 1 in 20 (low response) to 1 in 2 (high response) depending on a number of factors outlined below.