1. Mixed mode data collection in official surveys
Nino Zajc:
Mojca Noč Razinger:
NTTS 2017; Brussels, 16th March

2. Content Mixed modes classifications Web surveys in mixed modes
Data collection at SURS
Mixed mode results
To think about it…

3. Mixed modes
Minimization of costs
Minimization of survey errors €
TSE

4. Don Dillman classification
Different data collection methods for different samples
Different data collection methods in different waves of panel survey
1st wave nd wave
Different methods for different parts of the questionnaire
1st part nd part
Different methods to collect data from different populations (international surveys)
Mixed modes for communication between interviewers and respondents in the different phases of the research process

5. de Leeuw classification
Mixed mode in contact phase
Announcement mode is different from the method of data collection
Recruitment/Screening/Selection in mode different from the method of data collection
Mixed mode in phase of data collection
for different units of the same sample at one point in time and with the same questionnaire.
for different parts of the questionnaire for all units of the same sample at one time point and with the same questionnaire
at different time points for the units in the same sample (panel)
at different time points on different samples (units)
Mixed modes in follow up phase
Reminder in different mode from data collection mode
Other possibilities of mixed modes
for survey announcement for different sample units
for follow up for different sample units
concurrent data collection on units from different sample frames
use of different methods of screening questionnaire in the initial stage of contacting
Zajc (2011):

6. Web surveys in mixed modes
Web survey as method of data collection, different method for contact
Web survey as one of the methods of data collection
Web survey as one method in panel survey

7. Data collection at SURS
Enterprises
Persons and households
Data collection at SURS
TDM (Tailored Design Method)

8. Mixed mode results Enterprises

9. Mixed mode results Individuals and households
Coverage and response issues
Sequential design
Web response rates by segment of population with and without defined telephone number.

10. To think… How to motivate? Who answered? Data analysis Multitasking
Undesirable patterns