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. Author manuscript; available in PMC: 2018 Jun 1.
Published in final edited form as: Drug Alcohol Depend. 2017 Apr 15;175:171–178. doi: 10.1016/j.drugalcdep.2017.01.045

Table 3.

Examples of Online Resources to Locate Participants.

Typea URL Examples Purpose
Directories
White Pages http://www.whitepages.com/ Address and contact information based on last known address, academic or work affiliation
Alumni Associations http://alumniandfriends.uchicago.edu/ b
Organization/Work http://directory.uchicago.edu/ b
Internet Phone
Google Voice http://www.google.com/googlevoice/about.html Free domestic and international calls and texting; virtual ‘face-to-face’ interviews
Skype http://www.skype.com/en/
Facetime http://www.apple.com/ios/facetime/
Maps
Google Maps http://www.google.com/maps Address confirmation, satellite views to facilitate home visits
Social Media
Facebook / Subject contact via site based messaging, current location, job and collateral information
Twitter http://twitter.com/
LinkedIn http://www.linkedin.com/
Instagram http://www.instagram.com/
Mail Services
FedEx http://www.fedex.com/ Current Address, authorized signing for location verification, “Return Address Service” for new location
US Postal Service http://www.usps.com/
Miscellaneous
Dating Websites http://www.okcupid.com/b Current status, location, job, name changes, interests and hobbies, incarceration information, etc.
Wedding Registries https://www.theknot.com/registry/couplesearchb
Offender Search http://www.illinois.gov/IDOC/OFFENDER/b
Death Records http://search.ancestry.com/search
b

Examples provided vary by institution, organization, and location.