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Table 7 The ordered “mean rank” of confidence ratings for seven different question types for three different user types

From: Evaluating smartphone-based dynamic security questions for fallback authentication: a field study

Order Legitimate Strong Naive
1 App (888) Location (857) Battery (778)
2 Activity (880) Activity (833) Location (747)
3 Location (848) App (830) App (734)
4 Battery (805) Music (802) Activity (717)
5 Call (801) Battery (793) Music (702)
6 Music (776) SMS (725) SMS (672)
7 SMS (651) Call (690) Call (646)
  1. The higher the mean rank, the more confident users were in their answers. The mean rank values are designated within parenthesis right next to the question types. Please note that the mean rank values are compared by order of magnitude for only question types for a particular user type