<div dir="auto">Hello,<div dir="auto"><br></div><div dir="auto">The survey is not protected from multi voting in any way. </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">нд, 24 сту 2021, 17:19 карыстальнік Allan Mustard <<a href="mailto:allan.mustard@osmfoundation.org">allan.mustard@osmfoundation.org</a>> напісаў:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<pre>What are assumptions for that? Because given inherently biased samples (biased in way
not allowing for balancing/adjusting - survey is made because demographics are unknown!),
I am pretty sure that it is misleading to include such statistics.
We do not know how strong bias, even type of it and we can only guess how sample
of survey-takers is biased compared to general community (and there is tradictional
problem of people trying to manipulate survey by taking it multiple times,
strategic refusal to answer some questions about demographics or just lying).
For example if some group is overrepresented or underrepresented compared to
demographic of OSM mappers this survey is unable to detect it!
In real situation even with 5 000 people answering it is likely that
real confidence interval may be 20% or 10% of 1% - and we do not know
which one would be correct!</pre>
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<font face="Helvetica, Arial, sans-serif">Mateusz, et al,<br>
<br>
Our first assumption is that disseminating information through a
multitude of communications channels will reach a much less
biased sample than if we were only to announce the survey via
the talk lists. This is why the Board is spreading the word
about the survey via social media plus direct emailing to user
groups, to local chapters and communities, to working groups,
via WeeklyOSM, the website, and the wiki calendar, and is asking
all who read these announcements to propagate them farther via
any and all channels at their disposal. It is why the Board has
had the survey translated from original English into 15 other
languages (so far), the largest effort to translate an OSMF
survey to date.[1] It is also the rationale behind running the
survey for nearly one month, which is an unusually long duration
for a survey. Local communities have advised us that a month is
needed to disseminate information of this nature, particularly
in regions with difficult Internet access. At present we are
averaging over 250 responses per day to the survey.<br>
</font>
<p><font face="Helvetica, Arial, sans-serif">Second, when the data
are in, we plan to attempt to normalize the survey data with
known quantifiable data on mapping activity, such as data from
OSMstat.[2] This will help address geographic biases in the
sample. The major reason we have asked for demographic data
is to assess bias in the data against known characteristics of
the community as can be derived from OSMstats, but we suspect
that the demographic data will also be, in and of themselves,
of interest to much of the community. I point out that there
are some academic studies of the structure of the OSM
community, and we will examine them as well with an eye to
normalizing any selection biases we can.[3][4]<br>
</font></p>
<p><font face="Helvetica, Arial, sans-serif">Third, while indeed
about one quarter of respondents decline to provide the
optional demographic data, we are on track to collect enough
"full" surveys (i.e., including demographic data) to surpass a
3% confidence interval at the 99% confidence level.[5]<br>
</font></p>
<p><font face="Helvetica, Arial, sans-serif">Fourth, as for taking
the survey multiple times, this is indeed a possibility if
individuals have multiple email addresses. However, we choose
to assume, in line with the Etiquette policy, "good faith" on
the part of members of the OSM community.[6] By and large the
Board believes most members of the community who participate
in the survey will do so in good faith. That said, the reason
respondents are required to register with an email address is
exactly that--to discourage "gaming" the survey by responding
multiple times.</font></p>
<p><font face="Helvetica, Arial, sans-serif">Fifth, the Board is
aware that there will be some inherent selection biases. The
survey is not distributed on paper; hence, it is selectively
biased toward individuals with access to a computer and the
internet. We do not consider that a serious bias because
those tools are required for contributing to or using
OpenStreetMap. It does not cover all languages of all in the
community, so is selectively biased toward speakers of foreign
languages (one of the 16 in the survey, not necessarily
English). It is selectively biased toward those who follow
social media, are plugged into local chapters and communities,
read WeeklyOSM, read the wiki landing page, or map (since the
banner went up on <a href="http://openstreetmap.org" target="_blank" rel="noreferrer">openstreetmap.org</a>). The survey is
selectively biased against those who strictly map or use the
data and are disinterested in OSMF policy matters, since they
are less likely to take time to respond to the survey. If you
can identify other selection biases inherent in the survey,
please share them with the Board.<br>
</font></p>
<p><font face="Helvetica, Arial, sans-serif">cheers,<br>
apm</font></p>
<p><font face="Helvetica, Arial, sans-serif">[1] <a href="https://wiki.openstreetmap.org/wiki/Foundation/Surveys" target="_blank" rel="noreferrer">https://wiki.openstreetmap.org/wiki/Foundation/Surveys</a>
The only previous survey to have been translated from English
was the August 2019 survey for the local chapter congress,
which was translated into 11 languages, of which 8 were
European languages and 2 were Chinese in variant scripts; the
other language was Persian. The current survey is available
in 7 Asian languages (Chinese, Indonesian, Japanese, Korean,
Persian, Turkish, Vietnamese) as well as 9 European languages.<br>
[2] <a href="https://osmstats.neis-one.org/" target="_blank" rel="noreferrer">https://osmstats.neis-one.org/</a><br>
[3] <a href="https://link.springer.com/article/10.1007/s10708-019-10035-z" target="_blank" rel="noreferrer">https://link.springer.com/article/10.1007/s10708-019-10035-z</a><br>
[4]
<a href="https://2018.stateofthemap.org/2018/A09-Surveying_OSM_contributors__Learning_from_the_community/" target="_blank" rel="noreferrer">https://2018.stateofthemap.org/2018/A09-Surveying_OSM_contributors__Learning_from_the_community/</a><br>
[5] <a href="http://www.stat.yale.edu/Courses/1997-98/101/confint.htm" target="_blank" rel="noreferrer">http://www.stat.yale.edu/Courses/1997-98/101/confint.htm</a><br>
[6] <a href="https://wiki.openstreetmap.org/wiki/Etiquette" target="_blank" rel="noreferrer">https://wiki.openstreetmap.org/wiki/Etiquette</a></font><br>
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-------<br>
</p>
<div> <i>Allan Mustard, Chairperson</i><br>
<i>Board of Directors</i><br>
<i>OpenStreetMap Foundation</i></div>
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