The colour purple: the effect of questionnaire colour on mail survey response rates

Examines the effect on mail survey response rates of four different questionnaire colours - red, green, blue and purple - in a survey of 1600 NZ residents drawn at random from the NZ Electoral Roll. Analyses the most effective colour with both male and female respondents, across all age groups, and with each response wave. Source: National Library of New Zealand Te Puna Matauranga o Aotearoa, licensed by the Department of Internal Affairs for re-use under the Creative Commons Attribution 3.0 New Zealand Licence.