Table A2. Open in new tab Case-Level...

Construct

Notes

Sample source

Sample source (e.g., list, web advertisement)

Within-survey paradata

Date-time survey started and completed

Duration between survey started and completed

Frequency of invitations to surveys: each week, etc.

Absence of invitations to concurrent surveys during a certain time (e.g., 2 consecutive weeks after the first invitation to participate in the survey)

Device information provided for each session for surveys completed in multiple sessions:

User agent string or equivalent information (e.g., operating system and version number, browser and version number)

Is JavaScript enabled?

Is AJAX enabled?

Screen resolution

Cross-survey paradata

Date joined panel (if relevant)

Number of surveys the panel member has been invited to complete

Number of surveys the panel member completed

Individual-level completion rate (number of surveys completed / number of surveys invited)

Profile data

Profile information relevant to any quotas or other selection mechanisms

Date panel profile data last updated

Panelists recruitment

Recruitment origin of the selected panelists (respondents and nonrespondents): list, telephone, web, ad, etc.

Membership to other panels (if possible)

History of contacts

Number of reminders (if any)

Regular or extra incentive

Invited to participate in other surveys during the research or not

Quality data

If all sample cases (not only completes) are requested:

The status of any data quality checks (e.g., duplicate responses, speeding, straight-lining, trap questions)

For each case removed from the data, the reasons why the case was removed

We recommend that all sample cases be requested from the panel vendor

Table A2.

Open in new tab

Case-Level Data Recommendations

Construct	Notes
Sample source	Sample source (e.g., list, web advertisement)
Within-survey paradata	Date-time survey started and completed
	Duration between survey started and completed
	Frequency of invitations to surveys: each week, etc.
	Absence of invitations to concurrent surveys during a certain time (e.g., 2 consecutive weeks after the first invitation to participate in the survey)
	Device information provided for each session for surveys completed in multiple sessions:
	User agent string or equivalent information (e.g., operating system and version number, browser and version number)
	Is JavaScript enabled?
	Is AJAX enabled?
	Screen resolution
Cross-survey paradata	Date joined panel (if relevant)
	Number of surveys the panel member has been invited to complete
	Number of surveys the panel member completed
	Individual-level completion rate (number of surveys completed / number of surveys invited)
Profile data	Profile information relevant to any quotas or other selection mechanisms
Profile data	Date panel profile data last updated
Panelists recruitment	Recruitment origin of the selected panelists (respondents and nonrespondents): list, telephone, web, ad, etc.
Panelists recruitment	Membership to other panels (if possible)
History of contacts	Number of reminders (if any)
	Regular or extra incentive
	Invited to participate in other surveys during the research or not
Quality data	If all sample cases (not only completes) are requested:
	The status of any data quality checks (e.g., duplicate responses, speeding, straight-lining, trap questions)
	For each case removed from the data, the reasons why the case was removed
	We recommend that all sample cases be requested from the panel vendor

Construct	Notes
Sample source	Sample source (e.g., list, web advertisement)
Within-survey paradata	Date-time survey started and completed
	Duration between survey started and completed
	Frequency of invitations to surveys: each week, etc.
	Absence of invitations to concurrent surveys during a certain time (e.g., 2 consecutive weeks after the first invitation to participate in the survey)
	Device information provided for each session for surveys completed in multiple sessions:
	User agent string or equivalent information (e.g., operating system and version number, browser and version number)
	Is JavaScript enabled?
	Is AJAX enabled?
	Screen resolution
Cross-survey paradata	Date joined panel (if relevant)
	Number of surveys the panel member has been invited to complete
	Number of surveys the panel member completed
	Individual-level completion rate (number of surveys completed / number of surveys invited)
Profile data	Profile information relevant to any quotas or other selection mechanisms
Profile data	Date panel profile data last updated
Panelists recruitment	Recruitment origin of the selected panelists (respondents and nonrespondents): list, telephone, web, ad, etc.
Panelists recruitment	Membership to other panels (if possible)
History of contacts	Number of reminders (if any)
	Regular or extra incentive
	Invited to participate in other surveys during the research or not
Quality data	If all sample cases (not only completes) are requested:
	The status of any data quality checks (e.g., duplicate responses, speeding, straight-lining, trap questions)
	For each case removed from the data, the reasons why the case was removed
	We recommend that all sample cases be requested from the panel vendor

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