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Public Opinion Quarterly, Vol. 72, No. 4, Winter 2008, pp. 781791
FALSE CONSENSUS GOES ONLINE
IMPACT OF IDEOLOGICALLY HOMOGENEOUS GROUPS
ON FALSE CONSENSUS
MAGDALENA WOJCIESZAK
Abstract This study analyzes survey data obtained from members
of neo-Nazi and radical environmentalist discussion forums. It assesses
the extent to which participants in homogeneous online groups exhibit
false consensus, i.e., overestimate public support for their views, andwhether the overestimation increases with increased online participation.
Although the analyzed sample overestimates public support, the over-
estimation is no greater than found with more conventional populations
studied to date. However, false consensus among the neo-Nazis increases
with their involvement in online groups, also controlling for extremism.
Among the environmentalists, it is the extremism, not online participation
that accounts for false consensus. Theoretical and practical implications
of these findings are discussed.
Decades of research have demonstrated that there is a close relation between
peoples opinions and their perceptions of the public opinion climate (Wallen
1943; OGorman 1975, 1979; Taylor 1982). Those who dislike dark bread
will tend to think that others also dislike it, and people who support space
exploration will be inclined to believe that others also favor sending humans
into outer space (Ross, Greene, and House 1977). This tendency to attribute
ones own sentiments to other people has been labeled false consensus effect,
and seems to be widespread across issues and circumstances (Krueger andClement 1994).
Will radical ideologues active in homogeneous online groups also think that
the public shares their sociopolitical perspectives? Will continued interactions
with like-minded online communities exacerbate the degree to which partici-
pants see public support for their views? These questions are theoretically and
MAGDALENA WOJCIESZAK is with the Annenberg School for Communication at the University of
Pennsylvania, 3620 Walnut Street, Philadelphia, PA 19104-6220, USA. The author would like to
thank Dr. Michael Delli Carpini, Dr. Vincent Price, and Dr. Michael Hennessy from the Annen-berg School for Communication, as well as three anonymous reviewers and the editor. Address
correspondence to Magdalena Wojcieszak; e-mail: [email protected].
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practically relevant. Scrutinizing whether individuals embedded in reinforcing
communicative settings are yet more prone to exhibit false consensus adds
to the robust evidence that has primarily come from relatively conventional
samples. Analyzing whether false consensus increases with participation inideologically homogeneous online groups also addresses the debate regarding
fragmentation and polarization potentially occurring in the online environment
(e.g., Sunstein 2001).
This study thus assesses the extent to which false consensusunderstood as
overestimating public support for individuals own viewsoccurs among par-
ticipants in neo-Nazi and radical environmentalist online discussion forums.1
Contextualizing the findings suggests that although the analyzed sample over-
estimates public support, the overestimation is no greater than found among
more conventional populations in previous research. Online participation andideological extremism are also found to play important roles, although differ-
ently for neo-Nazis and radical environmentalists.
Research on False Consensus
Researchers have established that people tend to see general support for their
own views on such issues as racial attitudes (OGorman 1975; Fields and
Schuman 1976), nuclear energy, pollution regulation (Taylor 1982), environ-
mental problems (Glynn and Park 1997), space exploration, paying a traffic
ticket, or appearing in a supermarket commercial (Ross, Greene, and House
1977). Meta-analyses concerned with relative differences between support-
ers and opponents find that people who favor a given position estimate this
position to be more common than those who favor an alternative position
(Mullen et al. 1985). For example, students who agreed to carry a commercial
sign on campus thought that 62 percent would agree, while those who dis-
agreed said that 67 percent would also refuse (Ross et al. 1977). City respon-
dents with unfavorable attitudes toward Blacks were also more likely (average
66 percent) to impute segregationist values to others than those with favorable
attitudes (average 35 percent) (OGorman 1975). Similarly, both supporters
1. Studies on false consensus have primarily tested whether the estimates provided by opponents
and supporters differ, and hence the phenomenon traditionally has no direct bearing on whether
subjects will overestimate or underestimate the actual consensus (Mullen and Hu 1988, p. 334).
Increasingly, researchers have become concerned with accuracy and noted that paradoxically,
there are not many studies that directly compare estimates with actual frequencies (de la Haye
2000, p. 571; see Krueger and Clement 1994; Gross and Miller 1997; Krueger 1998; Kulig
2000). The operationalization proposed here, i.e., overestimating public support for own views,addresses the recent methodological discussions and also has several advantages. It speaks to
perceived differences with public opinion overlooked by measures that assess differences between
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and opponents projected their positions on various sociopolitical issues onto
student peers (e.g., abortion supporters estimated the support for 67 percent
while the opponents thought that 63 percent also opposed) (Bauman and Geher
2002).Meta analyses concerned with accuracy show that the extent to which peo-
ple overestimate support for their views is partly due to the factual or sample
opinion distribution. People in the minority (>49 percent) tend to overestimate
the consensus for their positions by an average of 24 percent and those in the
majority (51 percent>) underestimate it by roughly 6 percent (Mullen and Hu
1988), with approximately 60 percent being the factual consensus that sep-
arates the minority overestimation from the majority underestimation (Gross
and Miller 1997). For example, the majority willing to lend money to a friend
underestimated others willingness by 7 percent, while the minority who re-fused overestimated the consensus for their refusal by 25 percent (Goethals
1986). Similarly, the majority underestimated the factual consensus on so-
ciopolitical issues ranging from poverty reduction to nuclear warfare by an
average 6 percent while the minority overestimated it by 25 percent (Sanders
and Mullen 1983), andin another studyby roughly 7 and 21 percent,
respectively (Mullen and Smith 1990).
False Consensus, Homogeneous Groups
and Online Environment
Those studies have primarily relied on student, regional, or national samples,
and hence false consensus has been established among conventional popu-
lations. May this phenomenon be yet stronger among people embedded in
reinforcing settings, such as ideologically unanimous online groups? Might
continued interactions within such settings exacerbate the false consensus ef-
fect? Existing theory and research would suggest this to be the case. For one,
false consensus results from ego-defensive or dissonance-reducing motivationsto justify ones views and from selective exposure to consonant opinions (Marks
and Miller 1987). Both mechanisms occur within homogeneous online com-
munities. Members self-select to online groups that share their perspectives,
and although such self-selection does not demand that we err in our estimates
concerning the relevant populations. . .it does make such errors likely (Mullen
et al. 1985, p. 298). Also, consonant opinions might be more readily retrievable
from memory than dissonant ones, exacerbating the extent to which participants
are susceptible to the false consensus effect.
False consensus is also explained by opinion certainty (Fields and Schuman1976; Taylor 1982), and also by the lack of information that would demonstrate
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Wojcieszak forthcoming), they are confident in their judgments. Because such
online groups also provide reinforcing opinions and counterarguments are not
expressed, members may be yet more prone to see public support for their
views. Overall, participants in ideologically homogeneous online groups shouldbe particularly likely to overestimate public support for their perspectives, and
their overestimation should increase with increased participation in such online
groups.
Method
Data for this study come from an online survey conducted in summer 2005
of participants in neo-Nazi and radical environmentalist online discussion
forums.2 Participants email addresses and private messages (PM) were com-
piled by first selecting every second thread dating back to June 1, 2004 and then
selecting every second topic given a random start. Every second email address
or, when unavailable, every second PM was then randomly collected from
those topics to create a list of active participants. When member directories
were available, participants nationalities were checked to exclude non-North
Americans, to whom some questions would not be relevant.
An email with a link to the online survey was sent to 517 email addresses
and PMs, and a week later follow-up requests were sent. Of these, 202 re-
sulted in fully completed interviews used in this analysis (neo-Nazi n = 112,
environmentalists n = 90). An additional 121 resulted in partially completed
interviews, which are not included, and no response was received or the email
was returned for 194 contacts. The AAPOR response rate (RR1) is 39 percent.
The sample was younger (age M= 35, SD = 13) and more racially homoge-
neous (94 percent white) than the general population. Respondents were also
better educated (M= 16 years), mostly male (67 percent), and with median
household income between $30,000 and $50,000.
FALSE CONSENSUS
Consistent with this studys conceptualization of false consensus as overesti-
mating public support for ones own views, the difference scores between re-
spondents estimates and the factual public opinion distribution were calculated.
2. The forums were identified by an online search and web graph analysis using the Issue Crawlersoftware. The Issue Crawler builds the web graph from URLs provided by a researcher, analyzes
their outgoing links and displays a cluster map depicting interconnections between the websites
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Using standard wording from studies on false consensus, participants in neo-
Nazi forums were asked: In your opinion what percent of the American
population agrees that we have gone too far in pushing equal rights in this
country and that we havent gone too far in pushing equal rights. Thesequestions were adapted from Pew Research Center, which found that 44 per-
cent of Americans agreed that we have gone too far and 56 percent disagreed
(July 2003). Participants in environmentalist forums estimated the percent of
the American population that thinks that globalization is a good thing and
that globalization is a bad thing. This question was taken from Pew Global
Attitudes Project Poll, according to which 69 percent of Americans saw glob-
alization as good and 31 percent regarded it as bad (August 2002).3 The final
measure was created separately for each group by subtracting the factual public
opinion distributions from respondents estimates (neo-Nazis M= 6.01, SD=24; environmentalists M= 12.95, SD = 22).
LEVEL OF PARTICIPATION IN ONLINE GROUPS
Using participation in online groups as an independent measure requires ad-
dressing such issues as the frequency and the amount of time spent on-
line. These were assessed by two questions: During the past week, how
many times did you enter this forum and other forums that address po-litical issues from a similar point of view? (1 indicating never and
5 more than 7 times), and how much time did you spend participating
in this forum and in other forums that discuss political issues from a similar
point of view? (1 representing up to 30 minutes and 6 5 hours or more). To
create a complete measure, an additional question asked: When did you first
start participating in this forum and in other forums that discuss political issues
from a similar point of view? (1 indicating less than 3 months ago, and 5
more than 2 years ago). The final measure was created by averaging the re-
sponses (one factor, neo-Nazis= .76,M= 3.55, SD= 1.26; environmentalists = .80, M= 3.45, SD = 1.32; range 1.05.3, higher values indicate greater
participation).
3. Because the Pews questionnaire asked whether respondents completely or mostly
agreed/disagreed with the statement, We have gone too far in pushing equal rights in this coun-
try, Pews distribution was dichotomized so that it could be subtracted from the respondents
estimates. That is, completely agree and mostly agree responses were combined into agree,
and mostly disagree and completely disagree were collapsed into disagree, and the dontknow/refused responses (3 percent) were randomly divided between the two categories. Pew
Global Attitudes Project survey asked whether respondents thought that globalization is a very
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IDEOLOGICAL EXTREMISM
To address the potential spuriousness between online participation and false
consensus, the survey also measured extremism. Respondents indicated, on aseven-point scale ranging from 1 (strongly disagree) to 7 (strongly agree),
their agreement with 10 ideology-specific statements. Examples include Vio-
lence against non-white people is a natural ritual passage into true manhood
or All non-white people who are now in the US should be deported and not
allowed back into the country (neo-Nazi questionnaire) and Sometimes it is
worth sacrificing human lives so that nature survives or Arson, vandalism,
theft or other destructive attacks against businesses are acceptable when done
to promote environmental or animal-rights causes (environmentalist question-
naire). The final measure, created from averaging the responses, ranged from1 to 7 with 7 being the most extreme (one factor, neo-Nazis = .76, M= 5.2,
SD = 1.1; environmentalists = .87, M= 4.8, SD = 1.5).
Results
This study examined whether and to what extent participants in ideologically
homogeneous online groups overestimate public support for their own per-
spectives and whether their overestimations increase with online participation.
Because respondents estimates and also the public opinion distributions ob-tained from Pew Research Center were issue specific, neo-Nazis and environ-
mentalists were analyzed separately. To establish whether respondents exhibit
false consensus, the factual public opinion distributions as found by Pew were
subtracted from respondents estimates. Both groups overestimated public sup-
port for their positions. Neo-Nazis overestimated the proportion of the popula-
tion that thinks we have gone too far in pushing equal rights by 6 percent, on
average saying that 50 percent agrees versus 44 percent found by Pew. Envi-
ronmentalists exhibited greater false consensus, thinking that 44 percent of the
population saw globalization as bad, as opposed to the 31 percent found by Pew.To scrutinize the factors that exacerbate or attenuate false consensus and
to address the concerns regarding reinforcing online interactions, multivariate
models were constructed. Does false consensus increase with involvement in
ideologically homogeneous online groups? As model 1 in table 1 shows, online
participation indeed significantly predicted overestimating public support for
neo-Nazi positions, with age also being an important predictor. How large are
the effects? From the coefficients it can be calculated that every 10 years of
age, overestimation can be expected to increase by roughly 5 percent. In com-
parison, there is a 27.5 percent increase in overestimating racially intolerantattitudes from those least to most involved in neo-Nazi online forums. Given
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Table I. Predicting False Consensus
Neo-Nazis Environmentalists
Model 1 Model 2 Model 1 Model 2
Before-entry b Final b Before-entry b Final b
(SE) (SE) (SE) (SE)
Age 0.53 0.50 0.68 0.60
(0.19) (0.19) (0.21) (0.21)
Education 0.91 1.00 0.23 0.71
(0.92) (0.90) (0.86) (0.87)
Gender 3.83 3.81 2.93 4.73
(7.15) (7.03) (4.84) (4.81)
Income 1.64 1.30 1.93 1.93(1.55) (1.53) (1.66) (1.64)
Online Participation 5.50 4.12 0.19 0.18
(2.00) (2.08) (1.74) (1.70)
First BlockR2(%) 18.6 13.6
Extremism 4.58 3.93
(2.18) (1.83)
Incremental R2 (%) 3.4 4.8
Final R2 (%) 22.0 18.4
NOTE.Entries are unstandardized OLS regression coefficients with standard errors in paren-
theses.p 0.001, p .01, p .05
40-year-old environmentalist would overestimate public discontent with glob-
alization by 7 percent relative to a 30-year-old one. There was, however, no
relationship between participation in radical environmentalist online groups
and false consensus.Extremism triggers self-selection to ideologically homogeneous groups and
may also exacerbate false consensus (Taylor 1982). In order to establish that
the relationship between participating in neo-Nazi online groups and overesti-
mating public support is not spurious, ideological extremism was included in
the analyses. For the neo-Nazis, model 2 shows that although extremism was
positively associated with false consensus, with the most extreme neo-Nazis
overestimating public support by roughly 32 percent relative to the least ex-
treme, online participation remained significant. This indicates that those who
are very involved in neo-Nazi online groups are more likely to exhibit falseconsensus even after controlling for extremism and sociodemographics. For en-
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those most extreme actually underestimating public support for their views, and
with the moderately extreme environmentalists providing accurate estimates.
Conclusion
This study aimed to add to the literature on false consensus, by assessing the
extent to which this phenomenon occurs in atypical populations not studied to
date. This analysis also addressed the debate on fragmentation and polarization
potentially occurring in the online environment by determining whether par-
ticipants in ideologically homogeneous online groups are especially likely to
overestimate public support for their views, and whether online participation
exacerbates this overestimation.
Overall, the results show that the analyzed participants exhibit false consen-sus. Those active in neo-Nazi online discussion groups think that more people
disfavor the progress in equal rights than do in reality, and the radical envi-
ronmentalists overestimate the extent to which Americans see globalization as
bad. At the same time, the analyzed neo-Nazis are far from believing that the
population as a whole or even its solid majority espouses racially intolerant
attitudes, and the radical environmentalists still recognize that they are in a
minority. In other words, the extent to which the analyzed respondents overes-
timate public support for their views is not substantially greater than what one
would expect to find among a more conventional sample.This finding is noteworthy, especially given the past research and the unusual
nature of the sample. For one, people in general are unable to avoid projecting
their own positions onto others and hence the false consensus effect is seen
as an ineradicable bias (Krueger and Clement 1994). Radical ideologues
should do that to yet greater extent because their strongly held views are
easily accessible, readily evoked in mind, and frequently used when making
probability estimates (Tversky and Kahneman 1973; Iyengar 1990). Secondly,
people who are in the minority are especially likely to overestimate general
support for their positions (recall the average 24 percent; Mullen and Hu 1988).Because those with negative attitudes toward equal rights and globalization are
in fact a minority in American society, the estimates made by participants in
neo-Nazi and radical environmentalist online groups are lower than would be
expected.
While this finding might cast doubt on the concerns regarding fragmenta-
tion and polarization potentially occurring online, another finding lends partial
support to these concerns. Engagement in ideologically homogeneous online
groups substantially exacerbates the tendency among the analyzed neo-Nazis
to project their attitudes onto others. Compared to those least engaged, themost engaged neo-Nazis overestimate public discontent with equal rights by
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accounts for false consensus, in that extreme environmentalists assess public
support for globalization as lower than those less extreme.
Several issues need to be addressed. First, because the data depended on
self-report provided by unconventional respondents, the findings cannot begeneralized to other populations. Also, even though there is an association
between participation in neo-Nazi online groups and false consensus, the cross-
sectional design limits the ability to make inferences about causality. Although
there are theoretical reasons to suppose that ideologically homogeneous groups
exacerbate false consensus, longitudinal and experimental research is needed
to establish causality. Finally, the findings on participants in discussion forums
might not apply to those utilizing chat rooms or other computer-mediated
communication. In order to account for this, attempts were also made to recruit
visitors to neo-Nazis and environmentalists Yahoo! and IRC (Internet RelayChat) chats. Because those online spaces are less populated, the number of
respondents was insufficient to conduct analyses.4
Despite these limitations, this study has several noteworthy implications.
Contrary to expectations, some radical ideologues active in homogeneous on-
line groups are not substantially more likely than conventional individuals to
overestimate public support for their sociopolitical perspectives. This might
indicate that false consensus is a widespread phenomenon, whose magnitude
may be relatively unaffected not only by the issues studied (Mullen et al.
1985), but also by the populations whose public opinion perceptions are beinganalyzed.
It is such factors as reinforcing communicative environments or extrem-
ism that may affect the extent to which people attribute their own views to
others. For some individuals, processes occurring within ideologically ho-
mogeneous online communities, such as exposure to consonant opinions or
assessing public opinion based on an inaccurate sampling frame, might ex-
acerbate false consensus. Because voluntary political associations in general
tend to involve reinforcement, research should determine whether people ac-
tive in face-to-face organizations overestimate public support to a differentextent than those from online groups. To address the debate on the relative
perils presented by online selectivity, studies should also assess whether re-
inforcing interactions exacerbate false consensus differently among partic-
ipants in online and face-to-face groups. Finally, the role that extremism
plays in false consensus should also be examined further (see Fabrigar and
Krosnick 1995; Christen and Gunther 2003). Research needs to determine
whether the extent to which people with strong views project these views
onto others might be ideology or issue specific. Perhaps some individuals or
4. Participants in such groups are not likely to substantially differ from discussion forums partici-
pants because there is a high degree of overlap with neo Nazis and environmentalists utilizing both
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groups prefer to see their strongly held opinions as unique (Suls and Wan 1987)
and benefit from portraying public opinion climate as hostile. The continued
debates regarding polarization in the online and offline environment make
studies on false consensus and the factors that affect it both necessary andtimely.
Supplementary Data
Supplementary data are available online at http://poq.oxfordjournals.org/.
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