Presentation on theme: "Using Communication Research to Design Effective Messages for Public Health: The cases of HPV vaccine and anti-smoking PSAs 1 Joseph N. Cappella Annenberg."— Presentation transcript:
Using Communication Research to Design Effective Messages for Public Health: The cases of HPV vaccine and anti-smoking PSAs 1 Joseph N. Cappella Annenberg School for Communication University of Pennsylvania Effects of Public Information in Cancer an NCI Center of Excellence in Cancer Communication Research at the Annenberg School for Communication, University of Pennsylvania Presented OBSSR, NIH June 15, 2009
Message: Effects versus Design Effects: content and consequents Design: –Components –Analysis –Chosen: theoretically & based on real world content –Target audience: effects –Translation: Re-engineer for public health Avoid Select 2
Message Components Content: what the message is about –Persuasive Claims Offer reasons for and reject reasons against Implicit or explicit Format: how the “what” is presented –Equivalence Logical Topical, conceptual, propositional 3
Message Effects via Design Choose content & format To achieve acceptance –(by target audience) 4
For Example Content –Strong, weak arguments ( Petty & Cacioppo, 1986 ) –Altruistic versus self-interested Format –Framing: effective 70%; ineffective 30% –Sensation value 6
Goals for Today Are hi sensation value PSAs effective for smokers? Are PSAs using smoking cues effective? Are there arguments about smoking that appeal to all smokers? How do health messages about the HPV vaccine interact with public discourse about the vaccine? 7
MSV X AS (Strasser, Cappella et al 2009) H: Outcomes enhanced for Hi-hi Especially for hi SS smokers Physio, intention, beliefs re smoking
Message Sensation Value (Morgan et al, 2003) Content: Acted out, narrative, unexpected format, twist ending, Visual: cuts, edits, faces, unusual colors, intense moments (implicit, explicit) Auditory: music, sound saturation, unusual sounds, esp slow or fast voices Validity? 9
DESIGN 200 adult smokers (lowest M=19/day) MSV (2) X Arg Strg (2) X SS (2) 4 ads per condition (16) Careful selection from set of 600, 100 tested Method: real ads, multiple per condition
Key Results For high MSV –Corrugator Hi > Lo (p <.02) –Personal efficacy (low SS) Lo > Hi (p <.04); (hi SS = lo SS, hi MSV) For high AS ads –Skin conductance strong > weak (p =.05) –Heart rate (strong > weak) (p=.02)
Results: Brain response The hiMSV PSAs were associated with extensive activation in the occipital (including the fusiform gyrus) cortex and the parahippocampus, while the loMSV PSAs were accompanied by higher orbitofrontal, superior and inferior frontal, temporal and posterior parietal activation. Thus, the activations associated with loMSV PSA are suggestive of deeper cognitive processing than the hiMSV PSA. Moreover, absence of differences between the loMSV and hiMSV in the anterior cingulate cortex and higher posterior parietal activation suggests that higher MSV does not translate to higher endogenous attention.
Conclude High MSV can distract Cognitive resources to irrelevant features Consistent with Kang, Cappella, & Fishbein (2006) 19
Kang, Cappella & Fishbein 2006 60 Anti-marijuana Ads Adolescents Two ad features –Message sensation Value (MSV, Morgan et al., 2003) –Argument strength MSV -- attention –Focus on argument, stronger argument more persuasive –Focus on stylistic features, distracter, weak argument more persuasive –MSV as a moderator of argument quality on ad effectiveness 20
Design 3(I-squared high vs. I-squared low vs. smoking) x 43 (repeats of cues in each category taken from the 16 PSAs available) Participants (N=84) – 44 male – 47 African American, 27 white – Age 18 to 65 years, mean=36.9
30 F(2,62)=3.59, p<0.05 Sanders-Jackson, et al, unpublished
Conclusions Variance of looking is less with smoking cues (and hi Information Introduced, I 2 ) Cue—Visual Correlation: –Mean Pearson r =.37 (range: -23 to.98) For active smoking scenes (more urge), hi arg strength lowers attention to cues (smaller r) 31
Next Steps Three cue (none, peripheral, central) X two argument (high, low) factorial, smokers –Urge, physio, eye tracking (Strasser, Lerman & Cappella, CECCR II) –fMRI (Loughead, NCI CECCR II) Former smokers 32
The Problem with Arguments Argument strength important in acceptance in previous work Strong-weak is rated by smokers No a priori predictions Are there structural diffs between effective and ineffective anti-smoking arguments? 33
Anti-smoking Arguments Archive of > 1000 ads 199 selected: English, 30 sec, adult targets, neg consequences, treatment seeking Argument “extraction” 8 item arg strength (Zhao et al under review) 2004 –99 arguments, 300 adult smokers, 12 of 99 random, mall intercept 2008 –100 args, 487 adult smokers, 8 of 100 random, KN sample 34 Young Min Baek
Data Texts of arguments (10 predictors) –Automap (Carley) and LIWC (Pennebacker) –Synonym sets Individual differences (9 predictors) –Demographic characteristics (5) –# of cigarettes/last seven days –Need for cognition –Perceived vulnerability (2) –SOC, intention to quit combined 35
36 2004 survey (n = 99) 2008 survey (n = 100) Word-categoryMeanSDMeanSDtest statistic People (Intimate).188.8.131.52t =.39 People (Distant).55.951.211.37t = 3.98*** Smoking cessation.184.108.40.206t = -4.61*** SHS (secondhand smoking).08.27.22.50t = 2.42* Causation words1.211.05.921.18t = -1.84 Death-related words.220.127.116.11t =.85 Disease/Body.771.081.001.28t = 1.39 Poison/Chemical.18.104.22.168t = 2.09* Tobacco Company.19.55.08.31t = -1.78 Lifestyle/Cosmetics.601.04.28.57t = -2.66** Argument strength evaluated3.74.303.24.27t = 12.25* Note. * p <.05 ** p <.01 *** p <.001. 99 arguments are evaluated in 2004; and 100 arguments in 2008.
Data Analysis Strategy Arg, Person, Arg X Person AS MLM, specifically HCM Retention of interaction terms only if replicated 37
Person X Argument SHS –For females (+) –For younger (+) Disease/body –For educated (+) Chemical/Poison –For educated (+) 43
Person Effects Stage of Change (+++) Perceived vulnerability to disease (++) 44
Conclusions Argument strength highly individualized but –Early SOC –Perceived invulnerability to smoking harm Effective arguments focus on –intimates, death, and second hand smoke Some targeting: –Young & women: SHS –Educated: disease, poison, chemicals 45
Other Studies Emery Collaboration: into the field Death PSAs: PSAs with death themes –more fear, perceived risk & effectiveness (adults) Narrative & efficacy (print news): – transportation intention to quit Fear X efficacy intention to quit –both nec’y for early SOC –efficacy only for later SOC 46
HPV Resistance is social, political (also) Rolling cross section re HPV –One year, rep sample, monthly –Knowledge and news coverage Two experiments –HPV, STIs, promiscuity, rep sample –HPV, pos-neg frame, rep sample
Conclusions re HPV Public and public health agendas diverged Message framing mattered Ideology mattered Ideology affected message interpretation
The Public Debate Kelly et al Media coverage (+) knowledge
Human Papillomavirus (HPV) Most common STI in the US, infecting more than 20 million Americans Leading cause of cervical cancer; also associated with genital warts Despite the strong link between HPV and cervical cancer, until recently, most Americans were unaware of HPV and did not know that it is the primary cause of cervical cancer
HPV Vaccine The FDA approved June 8, 2006 Vaccine prevents infection against 4 strains of HPV Recommendation: vaccination to girls and women ages 9-26 The vaccine effective only if prior to infection with HPV
HPV Vaccine Debate Being vaccinated allows for increased and riskier sexual behavior Anti-cancer vs. Anti-STI vaccine Voluntary vs. Mandatory vaccination
Liberals in Congress and elsewhere have warned that the Bush administration and religious groups should not interfere with Gardasil's approval or required use. In response, many conservative groups have made statements supporting the vaccine. "Despite rumors to the contrary, our organization doesn't oppose the vaccine and we have taken no position regarding mandatory laws," said Wendy Wright, president of Concerned Women of America, a conservative group based in Washington. Some groups support the vaccine but oppose mandatory vaccinations because cervical cancer is caused by a sexually transmitted virus. vaccinationsvirus "We can prevent it by the best public health method, and that's not having sex before marriage," said Linda Klepacki of Focus on the Family, a Christian advocacy organization based in Colorado Springs. U.S. Approves Use of Vaccine for Cervical Cancer U.S. Approves Use of Vaccine for Cervical Cancer By GARDINER HARRIS
Texas Is First to Require Cancer Shots for Schoolgirls By RALPH BLUMENTHAL Published: February 3, 2007RALPH BLUMENTHAL Some parents have voiced concern that the plan could send a message that sexual activity was condoned or that vaccinations made it safe. On the whole, however, conservative and religious groups have not come out strongly against the vaccinations as long as families can opt out. The Texas Freedom Network, a nonpartisan advocacy group often critical of Mr. Perry, issued a statement praising his move. “Today’s decision by the governor is not just a positive step forward in efforts to promote women’s health,” said the group’s president, Kathy Miller. “It is also an important acknowledgment that health and science should not be held hostage to politics and ideology.”
Groups wary of drug industry motives find themselves on the same side of the anti-vaccination debate with unexpected political allies: religious and cultural conservatives who oppose mandatory use of the vaccine because they say it would encourage sexual activity by young girls. And in Illinois, a bill introduced by a legislator who had the virus the vaccine is intended to prevent prompted a conservative group’s blog to speculate that she had been promiscuous. “I’m offended by their ignorance, but if I have to take a hit to educate people, I’m willing to do it,” said the bill’s sponsor, Debbie Halvorson, the Democratic majority leader in the Illinois Senate. | February 17, 2007 Furor on Rush to Require Cervical Cancer Vaccine By STEPHANIE SAUL and ANDREW POLLACK Furor on Rush to Require Cervical Cancer Vaccine
Fox News PROPOSALS FOR MANDATES HAVE POPPED UP FROM CALIFORNIA TO CONNECTICUT SINCE THE FIRST PIECE OF LEGISLATION WAS INTRODUCED IN SEPTEMBER IN MICHIGAN. MICHIGAN'S BILL WAS NARROWLY DEFEATED LAST MONTH. LAWMAKERS SAID THE REQUIREMENT WOULD INTRUDE ON FAMILIES' PRIVACY, EVEN THOUGH, AS IN MOST STATES' PROPOSALS, PARENTS COULD OPT OUT EVEN WITH SUCH OPT-OUT PROVISIONS, MANDATES TAKE AWAY PARENTS' RIGHTS TO MAKE MEDICAL DECISIONS FOR THEIR CHILDREN, SAID LINDA KLEPACKI OF THE COLORADO- BASED EVANGELICAL ORGANIZATION FOCUS ON THE FAMILY. THE GROUP CONTENDS THE VACCINE SHOULD BE AVAILABLE FOR PARENTS WHO WANT IT, BUT NOT FORCED ON THOSE WHO DON'T.
Colbert Report Vision America If you have sex, God will give you cancer. http://www.comedycentral.com/motherlo ad/index.jhtml?ml_video=82235http://www.comedycentral.com/motherlo ad/index.jhtml?ml_video=82235
Religious Groups Respond Nor we can not overlook the moral dimension," Scarborough cautioned, ungrammatically, in a press release. "The governor's action seems to signify that God's moral law regarding sex outside of marriage can be transgressed without consequence." Family Research Council, which sponsored last fall's Values Voter Summit, claimed in its e-letter today that Texas had "erupted in protest," and couched its opposition to the vaccine as a parents-rights issue. "[T]he issue at hand is not whether to make the drug available to young women — few would argue otherwise — but whether or not it should be a requirement of school attendance for schoolgirls and who should literally call the shots," wrote FRC president Tony Perkins. "Parents should not have to 'opt-out'; rather they should be able to 'opt-in' their daughters for the vaccination."
Methods Annenberg National Health Communication Survey, a monthly online survey with a nationally-representative sample of adults Participants selected through RDD, one participant per household Survey ran in June 2006 Survey completion rate= 74%
Methods Survey consisted of three parts: –Experimental manipulation of information –Attitudes toward HPV vaccine policies Participants were randomized to read one of three versions (framing manipulations) describing the vaccine Sample: N=635; 51% female; 75% non- Hispanic white, mean age=47.6 yrs
Framing Manipulations HPV causes cervical cancer HPV is a sexually transmitted infection The vaccine may/may not lead to increased sexual promiscuity Message 1 Message 2 Message 3
Vaccination Intentions Intention measures: –How likely are you to get the HPV vaccine if it is available at little or no cost to you or your family? –How likely are you to get the HPV vaccine if you or your family has to pay for it?
Intentions to Vaccinate (1= very unlikely, 5= very likely) PAY, p<.20 NO COST, p<.005
Policy, Framing Version, and Ideology IdeologyMean (std) CervicalExt. Conservative Conservative Moderate Liberal Ext. Liberal 2.71 (1.496) 3.34 (1.295) 3.77 (1.150) 3.74 (0.976) 4.00 (1.732) Vaccines for the Uninsured STIExt. Conservative Conservative Moderate Liberal Ext. Liberal 3.57 (1.618) 3.66 (1.200) 3.65 (1.131) 3.67 (1.226) 4.00 (1.001) SexualExt. Conservative Conservative Moderate Liberal Ext. Liberal 2.08 (1.379) 2.78 (1.488) 3.60 (1.218) 4.14 (1.229) 4.43 (0.787) Ideology: p <.001
Attribute Framing HPV vaccine Media and Public Health Frames varied Affect judged effectiveness? Affect policy judgments? Cabral Bigman
Scope of Work Rolling cross section re HPV –One year, rep sample, monthly –Knowledge and news coverage Two experiments –HPV, STIs, promiscuity, rep sample –HPV, pos-neg frame, rep sample 5/9/2006
Framing Literature Kahneman and Tversky’s Prospect Theory (1979,1981) health communication framing studies Logically equivalent information different health preferences and behavior (e.g. Rothman et al., 2006 ) Framing of efficacy information represent attribute frames (Levin, Schneider & Gaeth, 1998) Efficacy attribute framing example: –Condom has 90% success rate vs. 10% failure rate (Linville et al., 1993)
Framing Media coverage -- positive attribute frame: “A vaccine licensed by the Food and Drug Administration in June protects against two strains of HPV that cause nearly 70 percent of cervical cancer cases. The same vaccine, Gardasil, produced by Merck &. Co., also prevents two other strains linked to 90 percent of genital wart cases.” (Howard Price, J. 2007, Feb 28, “Nearly 25% of females ages 14-59 have HPV, study finds” The Washington Times)
Framing Media coverage -- negative attribute frame: “Millions of women have annual Pap smears to test for cervical cancer, and tens of thousands undergo further expensive testing and procedures after receiving false positive tests. Such testing will continue in part because the vaccine’s preventive effects are years away but also because Gardasil does not protect against viral strains that cause up to 30 percent of cervical cancers.” (Harris, G., 2006, June 30, Panel Unanimously Recommends Cervical Cancer Vaccine for Girls 11 and Up, The New York Times)
Framing Media coverage -- mixed attribute frame “Called Gardasil, the vaccine has been proved to prevent two types of human papilloma virus infection, the strains responsible for 70 percent of cervical cancers. It is also effective against about 90 percent of the HPV strains that cause genital warts. Even then, Gardasil cannot protect against 30 percent of HPV strains that cause cervical cancer, so regular Pap smears are still recommended for cancer screening.” (Griffith, D. 2006, Aug. 31, Some parents not sold on cervical cancer shot. Sacramento Bee)
78 Framing Effects for Mandate Opinion Support by Ideology and Year Note. Framing effects reflect the mean difference between positive and negative frame conditions with prior mandate opinion as a covariate.
Amy Leader Cabral Bigman Caryn Lerman Hyun Suk Kim Jean Brechman Chul-joo Lee
Collaborators Amy Leader Cabral Bigman Young Min Baek Caryn Lerman Hyun Suk Kim Jean Brechman Chul-joo Lee Andrew Strasser Alyssa Bindman Heather Forquer Mario Giorno Yahui Kang Marty Fishbein Robert Hornik CECCR PI
Lessons Conventional wisdom Resistance: social & psychological Design: art & science Science: long way to go But …
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