1 internet survey by esc, nccu prepared by chia-hung tsai 2012.3.21
TRANSCRIPT
2
What is internet survey
Asking questions by mailing people through internet interface
It’s like mail survey; response rate is an issue (non-sampling error).
Respondents may be from telephone surveys or big databank.
Could be biased toward young, educated internet-users.
4
What is NOT internet survey
Entertainment polling: CNN(Quick vote), Yahoo…
Voluntary-panel: 優仕網Self-selected web surveys: government
5
Cost of Internet Survey
No cost of space, supervisor, interviewers, equipments, and telephone fees.
Need to collect Emails, maintain respondents, and reward respondents.
6
Advantages of internet surveys
Interesting interfaces. More elements: video, audio, and
experiments.Easy to track respondents’ attitudesNo boundary of space and time
10
Disadvantages of internet surveys
Not representative of population; young, educated, office people
Self-selection biasNot sure about who answers the
questionsNot sure about how many people will
respond.Not able to ask knowledge questions
11
2007 experimental research for RDEC
We successfully contacted 3,000 people out of more than 15,000 previous respondents through telephone.
Over 90% of people can log on internet.57% of people said they often surf the
internet.
12
(continued)
Only 1,000 people agreed to join the panel.
About 300 people responded to the survey each time.
We offered $2.5 dollars for each interview plus some rewards for loyal participants.
Spending too much to build up a panel.
male male male male
Difference in Gender,4 waves
0.0
1.0
2.0
3.0
ele. high univ.
Difference in Education, N=325
-20
010
2030
20-29 40-49 60+
Difference in Age, N=325
-10
-50
5
N1 Tao Yun Yi
Difference in areas, N=325
-10
12
34
14
Switching to New Method
We recruit people when we are doing surveys beginning from 2009.
We’re able to recruit 20-25% of respondents each survey.
About 7,000 panelists are in our pool.7 surveys have been conducted.
15
20071201 20091202 20100303 20100802
Number of Panelists Recruited from Projects
01
00
20
03
00
40
05
00
60
07
00
16
May Oct.
Last 4 Surveys' Res. Rates
%
02
46
81
01
21
4
May Oct.
Last 4 Surveys' Obs.
01
00
20
03
00
40
0
26
New Phrase: Website
• We built facebook and website in 2011.
• Facebook: PollcracyLab
• Website: 線上調查實驗室• We announce our results on facebook and
website.
27
What can we do?
• We send out questions to around 1500 respondents about every 2 weeks.
• Each wave of survey gets 500 completions.
• Every participant can collect 20 points for every completion. 600 points can make NTD$600 7-11 gift card.