  To account for privacy perceptions and preferences in user models and develop
personalized privacy systems, we need to understand how users make privacy
decisions in various contexts. Existing studies of privacy perceptions and
behavior focus on overall tendencies toward privacy, but few have examined the
context-specific factors in privacy decision making. We conducted a survey on
Mechanical Turk (N=401) based on the theory of planned behavior (TPB) to
measure the way users' perceptions of privacy factors and intent to disclose
information are affected by three situational factors embodied hypothetical
scenarios: information type, recipients' role, and trust source. Results showed
a positive relationship between subjective norms and perceived behavioral
control, and between each of these and situational privacy attitude; all three
constructs are significantly positively associated with intent to disclose.
These findings also suggest that, situational factors predict participants'
privacy decisions through their influence on the TPB constructs.
