Table 3.

Reasons for and against participation in passive mobile data collection (n = 1,947)

Reasons for not participating		Reasons for participating
Privacy, data security concerns	44%	Interest, curiosity	39%
No incentive; incentive too low	17%	Incentive	26%
Not enough information/control of what happens with data	12%	Help research, researcher	18%
Do not download apps	7%	Trust, seems legitimate, safe	11%
Not interested, no benefit	6%	Will help create better products & services	7%
Not enough time, study too long	5%	No additional burden	6%
Do not use smartphone enough; not right person for this study	5%	Like surveys & research	4%
Not enough storage	1%	Fun	3%
Other reasons	6%	Other reasons	4%
NA	3%	NA	2%

Note.—Percentages do not add up to 100 because respondents could mention multiple reasons.