above, no part of this book may be reproduced, stored in or introduced into a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording or otherwise) without the written permission of both the copyright owners and the authors of the book. 7 Comparing the response rates of autochthonous and migrant populations in nominal sampling surveys: The LOCALMULTIDEM study in Madrid Laura Morales and Virginia Ros 7.1 Introduction 7.2 Response rates in survey research: What do we know about interviewing immigrants? 7.3 The context and the study 7.4 Comparing the response rates of migrant-background and autochthonous individuals 7.5 Does trying harder pay off? The success of refusal conversion and additional location attempts 7.6 Concluding discussion 8 Non-response among immigrants in Denmark 5 The influence of interviewers' ethnic background in a survey among Surinamese in the Netherlands Anja van Heelsum 5.1
Response effectsVan der Zouwen (1989: 9) defines 'response effects' as those particular effects on the response that are caused by variables other than the ones which the researcher wants to measure with the stated question. Dijkstra & Van der Zouwen (1982) refer to four types of variables that can cause response effects. First, they distinguish variables that are related to the characteristics of the interviewer, which can include role dependent and role independent characteristics. Role dependent characteristics are, for example, motivation and skilfulness in interviewing in the intended manner. Role independent characteristics include, among others, ethnic background, sex, age and other personal characteristics of the interviewer, but in addition,