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Table 4 List of question types along with their corresponding question format, score calculation and existence of distractors

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

Question type Question format Score calculation Distractors
Call Open-ended Jaro-Winkler [38] see "Score calculation for communication questions" section
SMS Open-ended Jaro-Winkler [38] see "Score calculation for communication questions" section
Location Open-ended Haversine [34] see "Score calculation for location questions" section
Application Multiple-choice Eq. 1 see "Score calculation for app usage and music questions" section
Music Multiple-choice Eq. 1 see "Score calculation for app usage and music questions" section
Activity Multiple-choice and time selection Eq. 2 see "Score calculation for activity and battery charging questions" section
Battery Multiple-choice and time selection Eq. 2 see "Score calculation for activity and battery charging questions" section