Questionnaire length n Sampling error
Sample group 1 page 2 pages Difference p 1 page 2 pages 1 page 2 pages Diff z
All sample 58.5 54.8 3.7 .003 3924 3892 0.86 0.88 1.23 3.001
ANES Rs 84.1 82.6 1.5 .137 1977 1970 0.70 0.73 1.01 1.488
ANES NRs 36.9 29.9 6.9 .000 1948 1922 1.39 1.35 1.94 3.582
1-page questionnaire
Political Non-pol. Political Non-pol. Political Non-pol.
All sample 58.0 58.9 -1.0 .581 2016 1909 1.20 1.23 1.72 0.553
ANES Rs 83.5 84.7 -1.2 .373 1003 974 1.00 0.97 1.39 0.891
ANES NRs 36.9 36.8 0.1 .977 1013 935 1.91 2.01 2.77 0.029
2 page questionnaire
Pol. p. 1 Pol. p. 2 Pol. p. 1 Pol. p. 2 Pol. p. 1 Pol. p. 2
All sample 55.6 54.0 1.7 .342 1885 2007 1.25 1.23 1.76 0.951
ANES Rs 83.0 82.1 0.9 .534 969 1001 1.02 1.04 1.46 0.621
ANES NRs 30.4 29.5 0.8 .759 916 1006 1.94 1.89 2.70 0.307