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Table 6 Average accuracy scores for each question and user type

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

Question type Accuracy score
Legitimate Strong Naive
Call 0.76 0.13 0.008
SMS 0.46 0.08 0.002
Location 0.69 0.29 0.038
App 0.55 −0.03 −0.549
Music 0.46 −0.71 −1.782
Activity 0.42 0.06 −0.240
Battery 0.53 −0.005 −0.157