Mean or percent SD Minimum Maximum n
Dependent variablesa
 Interviewer exact question reading 71.03 0 1 8,150
 Any respondent problem behaviors 25.23 0 1 8,150
Independent variablesb
 Question characteristics
  Parenthetical administration
   No parenthetical in question 43.48 10
   Parenthetical in question read 43.48 10
   Parenthetical in question not read 13.04 3
  Response format
   Yes/no 82.61 19
   Selection 17.39 4
  Question length (in words) 18.47 10.24 1 43 23
 Respondent characteristicsc
  Gender (male) 47.89 0 1 355
  Education (in years) 13.68 2.37 12 20 355
  Cognitive ability 101.97 17.98 67 145 355
  Health status
   Bottom tertile 35.77 127
   Middle tertile 26.48 94
   Top tertile 30.42 108
   Missing 7.32 26
 Interviewer characteristicsd
  Experience (in months) 13.80 16.55 0 67 79