VersionDate:4/2019
3)SendsurveyinvitationwithsurveylinkviaSMS
4)SendsurveyinvitationviaSMStotakesurveyasvoicecall(respo ndentmakescall)
5)SendsurveyinvitationviaSMStotakesurveyasvoicecall(respo ndentreceivescallwhenreplyingviaSMS)
Anyoralloftheseinvitationdeliverymethodscanbeutilizedwithinasingleproject.Thechoiceofdelivery
methodcompletelydepen dsuponyourspecificusecaseforhowyouwanttocollectdatafr omyour
participants.
VOICECALLSURVEYS:
Whenparticipantstakeasurveyasavoicecall,questionsareaskedoneatatime,inwhichtheTwilioservicewill
usetext‐to‐speechtechnologytoreadthequestionstotheparticipantaudiblyontheirphone.Youmaychoose
thelanguageand/ordialectinwhichthetextshouldberead.
Participantswillrespondby enteringnumbersontheirphone'skeypad,thusonlynumericresponsescanbe
usedbecauseofthislimitation(thisincludestheuseofinteger/numberfieldsandalsomultiplechoicequ estions
withnumericcodings,inwhichtheparticipantwillenterthenumericcod edvalueontheirkeypad,notthelabel
thatisreadtothemoverthephone).
Forexample:
“Doyoulikeicecream?Yes,press1.No,press0.”
Oranumberquestionlike“Whatisyourage?”
SMSSURVEYS:
WhenparticipantstakeanSMSsurvey,questionsareaskedoneatatimeasanSMStextmessageconversation/
thread.SMSsurveysprovidemoreresponsepossibilitiesthanvoicecalls.Whileparticipantsinvoicecallscan
onlyrespondwithnumbers,theymayrespondwithanykindofalpha‐numerictextforanSMSsurvey.
NOTE:OnlyREDCapadministratorsareallowedtoenabletheTwiliooptiontoinitiateasurveyasanSMS
conversation.Muchlikeemail,SMSisnotconsideredasecureformofcommunication, soyoumaynotwantto
administersurveysasSMSconversationsiftheparticipantwillbesubmittingidentifying information(PHIorPII)
unlessyouhavebeengrantedspecialpermissionfromtheparticipanttodoso.Givensuch sensitiveprivacy
issues,onlyyourlocalREDCapadministratorcanenabletheoptionalsettingtouseSMSsurveys.Pleasenotify
youradministratoraboutthisifyouwishtohavethisoptionenabled.
COMPATIBILITY:
MostofREDCap'ssurveyfeaturesstillfunctionmuchthesamewhentakingasurveyviaSMSorasavoicecall.
Thisincludestheenforcementofrequiredfields,fieldvalidation,branchinglogic,usingtheSurveyQueuefor
multiplesurveys(onlyworkswithAuto‐Startenabled),surveyemailnotificationsandconfirmations,the
ParticipantList,AutomatedSurveyInvitations,surveyStopActions,andcomputeradaptivetests(CATs)
downloadedfromtheREDCapSharedLibrary.Oneofthefewsurveyfeaturesthatisnotcompatibleisthe
SurveyLoginfeature.
COST:
InordertousetheTwilioSMSandVoiceCallservicesinaREDCapproject,youwillhavetoconnectyourproject
toyourTwilioaccountbyenteringyourTwiliocredentialsintoREDCapduringthesetupprocess.AndasREDCap
makescallsand/orsendsSMSmessagesusingthisservice,allchargestoyourTwilioaccountwill bemadebased
uponitsusage.ThisisnotdonebyREDCapbutisdoneinternallybyTwilioasyouuseitsservices.Inthisway,no
monetarytransactionsaremadebyREDCap, andthusitisyourresponsibilitytomaintainthefundsinyour
TwilioaccountinordertoensurethattheservicecontinuestoworkforyourREDCapproject.IfyourTwilio