Page Comparison

PSID

string

Yes

The respondent's persistent PSID

rd_device_id

string

YesNo

Will check a respondent using Research Defender's /predupe api.  Use this to reduce ps_df_dupe statuses

ip_address

string

YesNo

Will check a respondent's eligibility with some buyers.  IP Address should be in the format 0.0.0.0