Introduction

The Persuasive Arguments Theory (PAT) is a psychological framework that provides insight into how group discussions can influence individual attitudes and decisions. This theory posits that the presence of compelling arguments within a group setting can sway members’ opinions, often leading to more extreme positions. Developed in the context of social psychology, the PAT is crucial for understanding phenomena such as group polarization, decision-making, and risk-taking behavior.

Basically, the theory suggests that a group of individuals with moderate positions will tend to shift to more extreme positions within group settings. Extremism is typically not the product of a single frenzied mind, but culmination of several interconnected minds, pushing each other to a more polarized position.

What is a Group?

Giorgio A. Tasca defines a group as:

A group is “composed of three or more people who have come together for a common reason (e.g., sports teams, work groups, classrooms, therapy groups), whose activities resulted in some kind of output (e.g., scoring goals, producing a product, learning, improving functioning), and who engage in some form of ongoing interpersonal interactions. A dyad (e.g., a marital couple) is not a group. Similarly, a collection of individuals who happen to find themselves in the same place at the same time for coincidental reasons is not a group. Group members have a common interest and perhaps a shared identity with the group, they engage in interactions with each other, and they contribute to some kind of output that is relevant and important to the group and its constituent individuals” (Tasca, 2020).

Kurt Lewin, the social scientist that coined the term group dynamics, explained that groups are dynamic and powerful beings which have power to influence individuals and communities (Gençer, 2019).

When referring to groups, we must expand our picture to more than an group of business people sitting around a table, or even a political rally. The modern era group is often online. These groups powerfully influence individual’s attitudes, creating a greater divide with more polarizing positions.

See Group Dynamics for more on this topic

Origins and Development

The origins of the Persuasive Arguments Theory can be traced back to the work of social psychologists who sought to explain why individuals’ attitudes become more extreme after group discussions. In the 1930’s, Robert Ladd Thorndike proposed that the influence of the group created more confidence in the individual members (Thorndike, 1938). Basically, an individual may hold certain attitudes or beliefs but remains moderate. However, in a group setting the individual becomes more confident in the rightness of those attitudes and beliefs.

In the late 1960’s and early 1970’s, Amiram Vinokur and Eugene Burnstein presented the Persuasive Argument Theory. They proposed that group discussion and group decision making motivated systematic revisions, leading to shifts toward risk or caution (Vinokur & Burnstein, 1974). Vinokur and Burnstein developed this theory to elucidate the mechanisms underlying this shift.

Rational Choice Theory

While none of the articles or books on Persuasive Argument refer to rational choice theory by name, they assume many of the RCT concepts. RCT posits that individuals “make decisions by weighing the costs and benefits of different options, ultimately selecting the choice that maximizes their utility or satisfaction” (Murphy, 2024).

Persuasive Argument Theory presuppose we form opinions based on rational thought. Bernstein explained that when an individual “evaluates or reevaluates alternative decision choices, he or she elicits arguments (reasons or considerations) that describe the attributes of each alternative and provide a basis for choosing one alternative over another” (Meyers, 1989).

Reid Hastie and Robyn M. Dawes warn, however, that even rational thought doesn’t guarantee the best solutions. They wrote that perfectly rational thought processes “do not guarantee true conclusions.” A realistic and correct conclusions must also have “realistic, valid inputs” (Hastie & Dawes, 2009). As we will examine later in this article, the information flowing from group discussion is far from balanced and realistic, creating a dynamic shift from logical, utilitarian examinations to limiting and polarizing opinions.

Group Polarization

Group polarization is a key concept within the PAT. It refers to the tendency for group discussions to amplify the initial leanings of its members, resulting in more extreme collective decisions. Group polarization occurs when members of a group share similar viewpoints, leading to discussions that reinforce their initial beliefs and push them further toward extremes.

There are several mechanisms through which group polarization can occur:

• Social Comparison: Individuals often want to be perceived favorably by their peers. In group settings, people may adjust their opinions to align with what they believe is the dominant viewpoint, sometimes taking it further to stand out positively among the group.
• Persuasive Arguments: During discussions, members present arguments supporting their shared position. The exposure to these arguments can lead individuals to become more convinced of their stance due to the reinforcement from others’ views, thus amplifying overall agreement within the group.
• Increased Confidence: Being part of a like-minded cohort can boost individuals’ confidence in their beliefs and decisions, making them less likely to consider alternative perspectives or moderate positions.

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Group polarization has significant implications for various contexts such as political discussions, jury deliberations, and organizational decision-making processes. It can result in heightened divisions between groups and contribute to radicalization on social issues when consensus leads participants away from moderate or balanced viewpoints towards more extreme ones.

Key Principles of the Persuasive Arguments Theory

The PAT is based on several core principles that explain how persuasive arguments within a group setting can influence individual attitudes and decisions.

Availability of Arguments

One of the fundamental tenets of the PAT is that the availability of persuasive arguments plays a crucial role in shaping group members’ opinions. Vinokur and Burnstein explain that for any choice dilemma there exists “a culturally given pool of persuasive arguments in support of each alternative course of action.” If the preponderance of persuasive arguments in this pool favors a particular alternative, the average initial choice reflects the direction of this preponderance. Moreover, if shifts in choice are produced by persuasive argumentation, it follows that they must in general be toward that alternative that initially elicits more and/or better arguments (Vinokur & Burnstein, 1974).

For example, an individual may belong to a group that holds a particular position on abortion. The individual may enter group discussion on the issue with their own opinion based on particular arguments in favor and against abortion. For clarity of the example, without delving into the weeds of a controversial topic, let’s consider the individuals arguments for abortion as argument ‘A’ and ‘B.’ The individual has also considered arguments against abortion. Let’s refer to these as arguments ‘C’ and ‘D.’

Now if the group is predominantly against abortion, members will likely produce more arguments against than for the issue. Let’s say that group discussion adds to the pool, arguments ‘E, F, and G’ against abortion. The individual group member now has a much larger pool of arguments against abortion than for, creating more confidence in their original position.

During group discussions, individuals are exposed to a variety of arguments that they may not have considered previously. The more compelling and numerous these arguments are, the greater their potential to sway group members’ attitudes.

Argument Strength

The strength of the arguments presented during a discussion also significantly impacts group members’ decisions. Strong arguments, which are well-articulated, logical, and supported by evidence, are more likely to persuade individuals to adopt a particular stance. The above example is over simplified, presupposing that all arguments are equal in weight. Different arguments have different weight both inherently and perceptively.

The power of an argument refers to its overall persuasiveness on the group (Meyers, 1989).

A single emotional argument may cast larger influence than several weaker arguments. Modern day influencers, political leaders, and marketing managers pull a wealth of information from databases to measure the wight and influence of particular topics. The power of an argument, consequently, has less to do with the truth, and more to do with the emotional and intellectual sway they create.

Informational Influence

Informational influence is another critical component of the PAT. It refers to the process by which group members are influenced by the arguments and evidence presented by others. When individuals perceive that the arguments presented by their peers are credible and rational, they are more likely to be persuaded and to adjust their own attitudes accordingly.

Information is not free flowing pieces of rationality. They are always connected to some emotion. Information that heightens emotions has more value than information that fails to arouse attention. Accordingly, arguments that arouse fear, suspicion, joy, and hope carry more weight than arguments relying on boring facts.

In a recent political debate, one of the candidates blatantly encouraged votyers to throw out evidence based practices and to go with their gut. Unsurprisingly, the candidate’s platform was built around arousing fear and hatred. The platform worked.

Pre-Existing Group Bias

Much of the literature on Persuasive Argument Theory either ignores the nature of the group or only briefly remarks on the preexisting bias inherent to most groups. Individuals join groups because of some commonality. Work groups share professions; Church groups share beliefs, in person groups share geography, and online groups typically share passions.

Political Rallies

If an individual already leaning toward the republican candidate, attends a Trump rally they will only hear persuasive arguments supporting the conservative position. The attending of the rally will only strengthen and polarize. Because of the heightened passion and emotions, alternate arguments are suppressed creating a false consensus effect. The rally, not the inherent strength of the argument, creates the level of persuasiveness of each argument.

Geography

In a recent visit to the breathtaking monument at Mt. Rushmore, I experienced the quiet influence of geography on personal opinion. South Dakota is predominantly populated by small cities. Smaller communities typically have a conservative political stance. While eating at restaurants in these largely conservative towns, the political discussions were almost exclusively republican biased. Without actually belonging to a group, the geography unintentionally exposed me to multiple passionate arguments for one political position without any counter arguments. Geography creates groups that polarize.

Online Groups and Social Media

Perhaps one of the most powerful polarizing groups are the online groups. These groups attract those already polarized. The constant interaction creates greater and greater shifts, leading to dangerous extremism. The group dynamics filter opposing ideas while glorifying extremisms. Consequently, the group tends to adopt the most radical arguments. The heightened emotion associated with extremism triggers explosive viral expansion. Algorithms designed to attract attention sends these messages to an ever-expanding circle.

Extreme titles motivate clicks, and when we click, we open a portal of like-minded messages. Without intention, we are inundated with lopsided arguments, creating a polarized and radicalized opinion.

Applications of the Persuasive Arguments Theory

The PAT has numerous applications across various domains, from organizational decision-making to political campaigning. Understanding how persuasive arguments influence group dynamics can help in designing more effective communication strategies and fostering better decision-making processes.

Organizational Decision-Making

In organizational settings, the PAT can be used to enhance decision-making processes by ensuring that diverse and compelling arguments are presented during discussions. Organizations should have a goal of optimizing operations. Accordingly, they benefit most from implementing plans that have true utility.

Organizations should encouraging open debate, allowing for the consideration of multiple perspectives. In this manner organizations can arrive at more balanced and well-informed decisions.

See Organizational Psychology for more on this field of psychology

Political Campaigning

The PAT is also relevant in the context of political campaigning. Campaign strategists can leverage the theory to craft persuasive messages that resonate with specific target audiences. Unfortunately, political campaigns underlying goal is not the good of the country but obtaining a political position. They may use Persuasive Argument Theory by identifying arguments that have the greatest influence on the voters. They may do this by presenting arguments that elicit high emotion.

By presenting multiple and persuasive arguments, political campaigns can influence public opinion and mobilize support for their candidates.

Jury Deliberations

Jury deliberations in the legal system provide another context where the PAT is applicable. The theory can help explain how jurors’ opinions may shift during discussions, leading to a consensus verdict. Ensuring that jurors are exposed to a range of persuasive arguments can contribute to fairer and more informed decision-making.

Criticisms and Limitations

While the PAT offers valuable insights into group decision-making, it is not without its criticisms and limitations. Some researchers argue that the theory may oversimplify the complexities of group dynamics and does not account for other factors, such as social influence and emotional biases, that can also impact decisions.

Social Influence

Social influence, including conformity and peer pressure, can play a significant role in group decision-making. These factors significantly contribute to the persuasive power of arguments, leading individuals to align with the majority opinion even if they are not fully convinced by the arguments presented.

See Asch Conformity Study for more on this topic

Emotional Biases

Emotional biases, such as fear, anger, or enthusiasm, can also affect group members’ attitudes and decisions. The PAT primarily focuses on logical and rational arguments, and may not fully capture the impact of emotional appeals on group dynamics. Our beliefs notably impact how we weigh and process information.

The role of feeling affects on decision making is more than a side note to the topic of opinion and beliefs. Information is often winnowed through feeling affects. Antonio Damasio, a distinguished Portuguese neuroscientist known for his groundbreaking work in understanding the human brain and emotions, suggests that memories are often tagged with a somatic markers. He explains that this marker plays a significant role in future decision making.

Basically, many of our beliefs are tagged with emotion. The topic triggers the emotion and biases incoming information. Damasio explains that there is still room for using “a cost/benefit analysis and proper deductive competence, but only after the automated step drastically reduces the number of options” (Damasio, 2005).

Emotions play a significant role in the persuasiveness of individual arguments.

See Somatic Markers for more on this topic

References:

Damasio, Antonio (2005). Descartes’ Error: Emotion, Reason, and the Human Brain. Penguin Books; Reprint edition. ISBN-10: ‎014303622X
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Gençer, Hüseyin (2019). Group Dynamics and Behaviour. Universal Journal of Education Research. DOI: 10.13189/ujer.2019.070128
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Hastie, Reid; Dawes, Robyn M. (2010). ‎Rational Choice in an Uncertain World: The Psychology of Judgment and Decision Making. SAGE Publications, Inc; Second edition. ISBN-10: 1412959039; APA Record: 2010-02957-000
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Meyers, R. (1989). Persuasive Arguments Theory A Test of Assumptions. Human Communication Research, 15(3). DOI: 10.1111/j.1468-2958.1989.tb00189.x
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Murphy, T. Franklin (2024). Rational Choice Theory. Psychology Fanatic. Published: 12-2-2024; Accessed: 12-14-2024. Website: https://psychologyfanatic.com/rational-choice-theory/
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Tasca, Giorgio A. (2020). What is group dynamics? Group Dynamics: Theory, Research, and Practice, 24(1), 1–5. DOI: 10.1037/gdn0000115
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Thorndike, Robert Ladd (1938). The effect of discussion upon the correctness of group decisions, when the factor of majority influence is allowed for. The Journal of Social Psychology, 9, 343–362. DOI: 10.1080/00224545.1938.9920036
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Vinokur, Amiram; Burnstein, Eugene (1974). Effects of partially shared persuasive arguments on group-induced shifts: A group-problem-solving approach. Journal of Personality and Social Psychology, 29(3), 305-315. DOI: 10.1037/h0036010
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