Experts with a cause: proposal to investigate the possible interactive effect of political expertise and the dispositional "need to evaluate" on N400 (ERP) measures of automatic evaluative

8/14/2019 Experts with a cause: proposal to investigate the possible interactive effect of political expertise and the dispositio

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Experts with a cause 1

Running head: AUTOMATIC EVALUATIVE PROCESSING IN POLITICAL EXPERTS

Experts with a cause: proposal to investigate the possible interactive effect of political expertise

and the dispositional need to evaluate on N400 measures of automatic evaluative processing

Brian C. Woolfrey

University of Minnesota


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Abstract

In 2003 Morris and colleagues conducted an ERP study of automatic evaluative processing in

which they found that N400 responses during a lexical decision task were significantly

attenuated when a target adjective was affectively congruent with a political prime word. Using

this modified N400 attenuation paradigm as a psychophysiological measure of automatic

evaluative processing, I propose to further study the relationship between political expertise, the

dispositional need to evaluate, and the tendency to automatically evaluate political stimuli.

Specifically, I predict to find an interactive effect betweenpolitical expertise (PE) and the need

to evaluate (NE) on ERP measures of automatic evaluative processing, just as Federico and

colleagues (2007) found an interactive effect between PE and NE on measures of ideological

constraint. If so, this would support the idea that automatic processing tendencies may be one of

the mechanisms behind the ideological organization of political information in high-NE political

experts.


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Awareness of this highly asymmetric distribution of ideological thinking inevitably led

researchers to wonder what it was about political involvement that seemed to facilitate the use of

ideology. One of the most popular answers to this question was that it may have something to do

with the amount of political information one has access to. People who are more involved in

politics are naturally exposed to more political information than people who are less involved in

politics. Many of them are even described by Krosnick (1990) as political "information junkies"

who spend a great deal of time seeking out and reflecting on political information. As

consequence, they usually have more complex and well-developed political schemas, or

"organized clusters of information about political institutions, actors and abstract political ideas",

from which they can draw to use as context when making political decisions (Federico, 2007,

222). In psychological literature, this is referred to as political "expertise", and can be measured

fairly accurately by simple tests of relevant political-domain knowledge (Krosnick 1990).

Because involvement in politics is closely associated with levels of political expertise,

many researchers were not surprised to find that, like political involvement, political knowledge

is also positively correlated with ideological constraint (Zaller, 1992). What's more, this

relationship was found to exist regardless of a person's actual level of political involvement.

Because of this, it was speculated that the acquisition of political information may be a key

variable in the development of ideological attitudes. According to this conceptualization,

acquiring new political information may inevitably facilitate the use of ideological thinking

because complex social information is cognitively organized in terms of schemas, and ideology

is the natural of schema by which political information is organized. Evidence to support this

idea comes from Zaller (1992) who showed that the mere contemplation of a political issue

before making a political decision was more likely to increase ideological constraint in political


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experts than political novices. Among other things, this suggests that the development of

ideological constraint may be "contingent on the complexity of political knowledge structures"

(Federico, 2007).

The problem with this idea, however, however, is that not allpolitical experts are prone

to think of political issues in ideological terms. Although the correlation between political

expertise and ideological consistency is moderate to strong, it is by no means perfect. Some

professors of philosophy, for example, boast an intimate understanding of abstract political ideas

but at the same time refuse to take an ideological stand on many political issues. Although they

are certainly a minority among their learned peers, low-constraint political experts do exist. As

such, it does not seem very likely that the acquisition of political information alone is responsible

for the facilitation of ideologically-organized thinking. Rather, it may be more likely that

political expertise is a necessary but not fully sufficient condition for ideological thought.

What is it then, if not political expertise alone, that facilitates the use of ideology? Recent

findings by Federico and colleagues (2007) suggest that the answer to this question may have

something to do with motivation. Specifically, he examined a motivational personality factor that

had been shown to be moderately correlated to political activism called "need to evaluate" (NE).

Originally developed by Jarvis and Petty (1996), the need to evaluate is a construct that reflects

the tendency of a person to spontaneously evaluate objects or experiences in terms of good or

bad. People who score high on the NE scale typically experience many "evaluative thoughts" and

hold relatively strong attitudes toward a variety of objects, people and ideas (Bizer, 2004). This

includes everything from public policies that directly affect a person's life to relatively remote

and inconsequential things such as abstract art. In an extensive analysis of National Elections

Study (NES) data, Federico found that this trait has a robust mediating effect on the relationship


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between political expertise and attitude constraint. Political experts tended to score higher on

measures of ideological constraint overall, but this effect was limited to only those experts who

scored high in measures of NE. Such an interaction between NE and political expertise is highly

consistent with the idea that the acquisition of political information itself is not sufficient to

facilitate ideological thinking, but instead may function as a fuel of sorts that interacts with

personality or external motivational factors to facilitate ideological thinking.

If so, this may suggest that political experts who have a high level of evaluative

motivation, such as party elites, may actually process political information in a fundamentally

different way than their low NE counterparts. One distinction that has been made between high

and low NE individuals in previous literature involves attitude formation styles. Specifically,

recent findings suggest that high-NE individuals tend to form their attitudes in an "on-line"

fashion, whereas low-NE individuals tend to form their attitudes in a more "memory-based" way.

On-line attitudes, as first described by Hastie and Park (1986), supposedly result from a process

in which an individual spontaneously evaluates each new piece of information and integrates

each of those evaluations into an overall working tally of evaluations. When prompted for an

opinion, this working tally is simply reported as the final attitude. Memory-based attitude

formation, in contrast, involves the relative deferral of judgment until a judgment is called for

and requires on-the-spot integration of immediate context and relevant information that a person

is able to recall. Based on this theory, we would expect that people who form their opinions in an

on-line fashion would be able to report their attitudes or evaluations more quickly upon request

than people who use memory-based attitude formation strategies. Indeed, this was exactly the

type of distinction that was originally used by Hastie and Park (1986) as evidence that individual

differences in processing styles exist. Thus, when Jarvis and Petty (1996) found that high-NE


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participants reported evaluations of everyday objects significantly faster than low-NE

participants, they reasonably concluded that high trait NE is associated with a more on-line

process of attitude formation and low trait NE is associated with a more memory-based process

(as cited in Bizer, 2004).

Further research by Hermans, Houwer, and Eelen (2001) suggest that these apparent

differences in attitudinal formation styles may be related to differences in "automatic" processing

tendencies. In this study, high-NE participants identified words to be affectively congruent with a

positive or negative prime word faster than they identified words to be incongruent with the

prime word. Low-NE participants, however, showed no statistical difference in the time it took to

identify the congruency of the words pairs. This evidence ofaffective priming in response to

semantic stimuli lends strong support to the idea that high-NE individuals may process affective

information in a more "automatic" way than low-NE individuals. According to this line of

thinking, otherwise known as the "hot cognition" hypothesis, all socio-political concepts are

coded into long-term memory with a corresponding positive or negative affective "charge" that is

quickly and automatically activated upon any future presentation of that same stimuli (Morris,

2003). Thus, people who tend to chronically evaluate incoming stimuli should possess

particularly strong evaluative associations. Moreover, in a decision-making scenario in which

multiple pieces of information are presented to a high-NE individual, each new piece of

information is thought to automatically activate an entire network of evaluative associations. If

two or more of these networks happen to contain the same attitudinal valence nodes (e.g. "good"

or "bad"), these overlapping valences are strengthened and primed through converging

activation. It is through this cognitive mechanism by which an evaluative "tally" may be kept

during on-line evaluative processing. Additionally, this redundant strengthening and priming of


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evaluative judgments may offer a plausible explanation as to why Lodge and Taber (2000) found

that affective true/false judgments were made about twice as fast as more "cognitive" true/false

judgments regarding a hypothetical congressman (as cited in Morris, 2003), and why Bizer

(2006) found that attitudes created through on-line processing were stronger and more resilient

than attitudes created through memory-based processing.

More importantly, this model may have considerable explanatory power regarding

Federico's (2007) findings of a possible interactive effect of NE and political sophistication on

ideologically-organized thinking. The more political information high-NE individuals are

exposed to, the stronger and more redundant the evaluative networks of these people would

theoretically become. Eventually, it may be the case that new political information starts to

become cognitively organized in terms ofcommon evaluations rather than simply being

organized in terms of "cold" nomological networks (see Figure 1 for a crude hypothetical

example). Such a model may provide a reasonable explanation as to why high-NE political

experts are more ideologically constrained in their thinking compared to low-NE experts and

political novices.

Simple behavioral evidence, however, has never been considered sufficient grounds on

which to base an entire complex model of information-processing (Stanovich, 2007). In the

domain of cognitive psychology, such models have only been considered valid if they are

supported by converging evidence from multiple domains of measurements such as self-report

data, behavioral-performance measurements, neuropsychological dissociations and, most

notably, psychophysiological measurements of brain function. The latter has been proven to be

particularly useful in helping to identify distinct neural processes and subsystems involved in

information processing. Recently, the tools of cognitive neuroscience have begun to be used as


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converging evidence by political psychologists as well. Although controversial in some circles

due to the misuse or oversimplification of psychophysiological evidence, the

psychophysiological approach has been particularly successful in the past at identifying

automatic cognitive-political processes that have previously only been inferred by behavioral

observations (Weston, 2007).

With this in mind, Morris and colleagues (2003) took the first step in using

psychophysiological methods to provide converging evidence for the "hot cognition" hypothesis

of political information processing. In this study, event-related-potential (ERP) recordings of

brain activity were interpreted as evidence that participants evaluated political stimuli in a

relatively automatic way and that these automatic evaluations affected later processing of

political information. To do this, they measured changes in a negatively-deflected ERP wave that

occurs about 400 milliseconds after the onset of stimulus presentation. In the domain of

cognitive neuroscience, the amplitude of this "N400" wave has been established as a fairly

reliable measure of semantic expectancy. When a word is presented to a participant, semantically

unexpected words typically produce a greater N400 wave amplitude (greater peak negativity)

than semantically primed words (Kutas & Hillyard, 1980, as cited in Morris, 2003). This

difference has been interpreted by many to reflect underlying levels of neural processing activity.

When a word is semantically primed through inference or the activation of a nomological

network, the node that the word occupies in a nomological network is thought to become

activated in such a way that neural pathways from this node from long-term memory to working

memory are put into a state of "readiness" and thus take relatively less bottom-up processing to

access (Morris 2003). It is this type of facilitation that is thought to be reflected in the relative

attenuation of the N400 wave during semantic priming or inference tasks.


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Morris and colleagues (2003) adapted this well-established cognitive neuroscience

paradigm to test whetheraffective incongruity in the domain of political information would also

produce changes in the N400 wave. In this experiment participants were presented with a

political object prime word and then a moment later were presented with an affective target

adjective that was either affectively congruent or affectively incongruent with the prime word

(depending on evaluative pre-testing and careful selection of these pairs for each participant).

When the second word was presented, subjects were told to make a judgment as to whether the

target adjective was positive or negative in valence. As predicted, it was found that affectively

incongruent political object prime / affective target pairs elicited an enhanced N400 negativity

relative to affectively congruent prime/target pairs. This is important because it provides

psychophysiological evidence of a "priming" effect of political stimuli on evaluative adjectives

and thus supports the hot cognition theory that affective evaluations are stored along with

semantic political information.

As already discussed, automatic processing styles have already been linked to the need to

evaluate (NE) trait through behavioral evidence. Because of this I hypothesize that the difference

in N400 peak negativity between affectively congruent and affectively incongruent political

object - affective target pairs, oraffective facilitation scores, will be greater in high-NE

individuals than in low-NE individuals. Also, because the evaluative networks of political

experts with high-NE should be even stronger based on the theoretical model discussed earlier, I

predict to find an interaction between NE and PE such that political experts with high-NE show a

far greater difference in affective facilitation than any other group. If so, this may lend

preliminary support to the idea that automatic evaluative processing styles may be at least one of


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prime/target pairs will then be calculated for each group and used in the final analysis. Also,

because previous behavioral studies have found that there is no statistical difference in affective

facilitation between positive and negative stimuli, these differences will be ignored and both

positive and negative stimuli will be collapsed into the congruent and incongruent groups.

Lastly, a vertical electro-oculogram (EOG) electrode will be used to detect and discard trials with

ocular artifacts.

Stimuli and Procedure

Except for added measures of NE and political expertise, the paradigm used in this

experiment will be virtually identical to that used by Morris (2003). Accordingly, participants

will come in two days before their scheduled experimental session for pre-testing. During this

phase of the experiment participants will complete a computerized "prime-selection" task in

which they indicate their attitudes (positive or negative) toward 36 different political "attitude

objects" as quickly as possible. Based on decision latency measures, the 5 strongest positive and

5 strongest negative attitude objects will then be selected as the prime words for that individual

in the following experimental session. Also during this pre-test session, the NE self-report

questionnaire and the test of political knowledge will be administered to participants.

During the actual experimental session, each participant will sit in a comfortable chair

and all political prime and target words will be presented in 36-point red font against a solid gray

background on a high-definition, high-contrast computer screen situated approximately 90

centimeters from the participants' eyes. All florescent lights will be turned off to reduce 60hz

EEG noise. To ensure that participants attend to the prime, they will told that the prime words

that are presented on the screen are "memory" words that may be used in a memory test later in

the study. As in Morris' (2003) study, these prime words will be presented for 150ms each,


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followed by a delay of 100ms before the target word is presented. The target word will remain on

the screen for 1 second and then be followed immediately by an "R" to indicate that the

participant must make a judgment as to whether the target word was positive or negative in

valence. These target words will be from the same list of 15 "clearly positive" and "clearly

negative" adjectives used by Morris (2003). Each target word will appear a total of two times in a

randomized order for each participant and be preceded by either a positive or negative prime.

Thus, each prime word will appear a total of six times and be paired three times with a negative

target and three times with a positive target.

Results

Once all measurements are taken and the N400 components are averaged within each

group for both congruent and incongruent prime-target pairs, the differences in average

amplitudes between the congruent and incongruent pairs will then be calculated for each group.

Based on Morris' (2003) study, these difference scores should reflect the degree of affective

priming or facilitation that took place in each group and thus provide a dependant measure of

automatic evaluative processing. For statistical analysis, data will be entered into a 2 (NE) X 2

(PE) between-groups analysis of variance with the "affective facilitation" score serving as the

dependant measure.

If my first hypothesis is true, we should find a main effect for both the need to evaluate

and political expertise such that the high-NE and high-expertise groups show greater affective

facilitation than the low-NE and low-expertise groups. If my second hypothesis is true, post-hoc

analysis will reveal that there is an interactive effect between NE and expertise such that only the

high-NE / high-expertise group will show statistically significant affective facilitation scores. No

other difference should be significant (See Figure 2 for hypothetical representation).


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Discussion

If a main effect of NE was found using Morris' N400 attenuation paradigm as a

dependent measure of automatic evaluative priming, this would be consistent with previous

behavioral findings that NE is related to automatic processing, or "hot cognition". A more

important finding would be the possible interactive effect of NE and political expertise on N400

measures of automatic evaluative processing. This evidence would lend support to the model of

overlapping and redundant affective networks in high-NE political experts and, when compared

to Federico's (2007) findings of an interactive effect between NE and political expertise on

measures of ideological constraint, would suggest the possibility that automatic processing

tendencies may be one of the mechanisms behind the apparent ideological organization of

information in high-NE political experts. If so, this may have far-reaching implications on how

we understand political expertise and motivated decision-making.

For this study to be interpreted properly, however, several limitations must first be

addressed. First, the variables in this proposed study are all pre-existing factors. Pseudo-

experiments like this can only give us information about associations between variables. Even

when measures are taken from multiple domains (such as behavioral and psychophysiological),

we can still only speculate about underling causal relationships between these variables. There

are also other limitations. Morris' (2003) study only provided preliminary support for the

hypothesis that N400 attenuation was a valid measure of affective priming. As he cautioned, it

could be that the N400 wave reflects or includes some other processes that we do not yet

understand. Also, the procedure of dichotomizing continuous variables such as political expertise

and NE may not be the best way to analyze an interaction because of the problems it creates with

regard to statistical power. A similar problem may also arise out of the fact that the proposed


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sample is limited to college students who are unlikely to represent the entire domain of political

expertise. A potential solution to both of these problems might be to recruit additional

participants from a group of political party elites and then analyze the data in a more

parametrically-oriented way.

Despite these few weaknesses, the proposed study would take an important step toward

clarifying the role of evaluative motivation and political expertise with regard to political

decision-making, and would likely encourage new studies to explore the "black box" of attitude

cognition in more detail. Future studies would most likely include functional MRI investigations

into neural differences in political information processing styles. Additionally, evidence of

distinctive processing styles may inspire investigation into the merits and weaknesses of each in

relation to real-world political situations. Studies have shown that that although most political

experts are better at remembering political information than political novices, they are only

slightly better than chance when it comes topredictingactual political and social events (Tetlock,

2005). Could this be because the majority of political experts are influenced more heavily by

automatic processing and therefore ignore important contextual information in favor of

programmed ideological schemas? Or is this effect pushed by memory-based thinkers who may

evaluate political stimuli less efficiently than on-line thinkers? Any future study on this topic

would be fascinating and would undoubtedly have a profound effect on the way we think about

political expertise and motivation.


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References

Bizer, G. Y., Krosnick, J.A., Holbrook, A.L., Wheeler, S.C., Rucker, D.D., Petty, R.E. (2004).

The impact of personality on cognitive, behavioral, and affective political processes: The

effects of need to evaluate.Journal of Personality, 75, 995-1028.

Bizer, G. Y., Tormala, Z.L., Rucker, D.D., Petty, R.E. (2006). Memory-based versus on-line

processing: Implications for attitude strength.Journal of Experimental Social

Psychology, 42, 646653.

Converse, P. E. (1964). The Nature of Belief Systems in Mass Publics. In D. Apter (Ed.),

Ideology and Discontent, New York: Free Press.

Converse, P. E. (2000). Assessing the Capacity of Mass Electorates.Annual Review of Political

Science, 3, 331-353

Federico, C. M., Schneider, M.C. (2007) Political expertise and the use of ideology: Moderating

effects of evaluative motivation.Public Opinion Quarterly, 71, 221-252

Hastie, R., Park, B. (1986). The relationship between memory and judgment depends on whether

the judgment task is memory-based or on-line.Psychological Review, 93, 258268.

Hermans, D., Houwer, J., Eelen, P. (2001). A time analysis of the affective priming effect.

Cognition and Emotion, 15, 143165.

Jarvis, W. B. G., Petty, R. E. (1996). The need to evaluate.Journal of Personality and Social

Psychology, 70, 72194.

Jennings, M. K. (1992). Ideological thinking among mass publics and political elites. Public

Opinion Quarterly, 56, 420-440

Krosnick, J. A., (1990). Expertise and political psychology. Social Cognition, 8, 1-8


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Morris, J. P., Squires, N.K., Taber, C. S., Lodge, M. (2003) Activation of Political Attitudes: A

Psychophysiological Examination of the Hot Cognition Hypothesis.Political

Psychology, 24, 727-745.

Stanovich, K. E. (2007).How to think straight about psychology. Boston: Allyn and Bacon.

Tetlock, P. E. (2005).Expert Political Judgment: How Good Is It? How Can We Know? New

Jersey: Princeton University Press

Weston, D. (2007). The political brain: The role of emotion in deciding the fate of the nation .

Cambridge: Public Affairs

Zaller, J. (1992). The Nature and Origins of Mass Opinion. New York: Cambridge University

Press.


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Figure Caption

Figure 1. Hypothetical conceptualizations of "cold" (top) vs. "ideological" (bottom) cognitive

organization of political information.


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Political Party

Republican Democrat

High Taxes

War

Death Penalty

Gun Control

+ -

+

-

+

-

+ -+

-

-+

-

-

Obama

Figure 1

Political Party

War

- +

Democrat

Obama

High Taxes

Republican

Gun Control

Death Penalty

Bush


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Figure Caption

Figure 2. Hypothetical results showing the possible interactive relationship between political

expertise and the need to evaluate (NE) on N400 affective facilitation (N4AF) scores.


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N400

Affective

FacilitationScore

(N4AF)

Political Novices Political Experts

High-NE

Low-NE

Figure 2

Documents

Experts with a cause: proposal to investigate the possible interactive effect of political expertise and the dispositional "need to evaluate" on N400 (ERP) measures of automatic evaluative