ELM - The Elaboration Likelihood Model
The ELM is the mirror every marketing team member out there should hold up so that they can start with one most pertinent question…
The BACKDROP:
The year was 2006 & this was way before my career in IT / software could start. I had the habit of critiquing advertisements & I don’t have the foggiest idea as to when something of a fleeting pass-time hobby back then turned into a full-blown passion over a period of time…
I was on a holiday in the mountains of southern India with a few of my friends & we were at a diner waiting for our order. I saw a Coca Cola print advert hanging on the wall & expressed my deep reservations rather strongly quashing the element of celebrity endorsements for products where it gets driven to a point where one doesn’t even know whether they are buying the product for its actual worth / value addition or because they see their favorite celebrity looking all glam & hep (at times bordering sleazy – remember the Slice advert featuring Katrina Kaif).
And as I said that, one of the friends thrusted a bottle of coke right up to me on my table & challenged me with, “Ok, let’s see how you advertise this product now without involving any celebrity”.
Although the competitive side of me took that up as an immediate challenge & came up with a short copywrite bordering on the lines of “this is your reason to relish scorching tropical / sub-tropical weathers” (a bit of localization in there as well), I have grown beyond that point to perceive & believe that there indeed could be more than one perspective to product endorsements after-all. At the end of the day it is the metrics like Revenues that hold a mirror to any idea discussed in the boardrooms which is why ROI, CBA, the RISK:REWARD ratio would drag everything down to reality forcing one to objectively analyze what would work & where the money ought to go.
Marketing, persuasion, branding, politics, leadership, sales, social media, product adoption - beneath all of them sits one central question:
What do people think?
How do people change their minds?
How do they make decisions?
Why do they BUY?
For decades, businesses assumed persuasion was mostly about presenting better arguments. If your product was superior, people would naturally choose it. But reality has proven that it rarely works that way.
Consumers buy expensive shoes because a celebrity wears them
People tend to trust charismatic founders with weak products
A beautifully packaged product often outsells a technically superior alternative
A confident speaker can persuade audiences even with shallow arguments
This is exactly the side of human behavior the Elaboration Likelihood Model (ELM) underlines & tries to explain.
Developed in the 1980s by psychologists Richard E. Petty and John Cacioppo, ELM became one of the most influential theories in persuasion psychology. It explains how people process persuasive messages and why some messages create lasting attitude change while others create only temporary influence.
At its core, ELM proposes something deceptively simple & yet hard to believe:
“People do not always think deeply before making decisions, they sometimes carefully analyze information but most times they are found relying on shortcuts, impressions, emotions, or other surface-level cues”
Understanding this distinction is one of the most powerful advantages a marketer, product leader, cofounder, communicator or negotiator can possess.
Here’s a break down of the model in depth, how it works in the real world inclusive of a case study that makes the framework easy to apply.
What is ELM?
The Elaboration Likelihood Model (ELM) tries to explain how persuasion happens through 2 different routes namely the Central Route & the Peripheral Route.
The word elaboration here could simply refer to the amount of thinking a person does about a message shared over any marketing asset. The model argues that persuasion depends heavily on how much of a mental effort is needed & how much the audience is willing to invest. If people are highly motivated / deeply interested, they process information carefully. Otherwise they could be distracted, uninterested, overloaded, emotional, act indifferent to or rely on shortcuts instead.
1. Central Route of Persuasion
The central route occurs when people think carefully & critically about information before forming an opinion. The evaluation tends to take the course of:
Facts
Evidence
Logic
Trade-offs
Data
Credibility of arguments
Long-term implications
Some of the questions that are most likely to arise are:
Is this actually true?
Does the product solve my problem?
What are the pros & cons?
Is the evidence convincing?
What risks exist?
Because the audience has more skin in the game & is highly involved here, deeply processing information, persuasion through this route usually results in:
Much stronger beliefs
An attitude change that’s long-lasting
Higher resistance to counterarguments
More stable decision-making
In simple terms, if people think deeply & tend to agree with you, the persuasion tends to stick on for a really long term.
2. Peripheral Route of Persuasion
The peripheral route occurs when people do not invest much cognitive effort into evaluating a message. Instead of deeply analyzing arguments, they rely on quick cues or mental shortcuts, some of which may be:
Charm / Appeal
Wittiness
Popularity
Celebrity endorsements
Packaging
Social proof
Emotional appeal
Repetition
The audience is not carefully analyzing logic / rationale building up into the advertisement, let alone analyzing the product itself. They are merely reacting to signals around the message used in the advert, the tone & its perkiness or some other element that they visually / mentally perceive as soothing.
Let’s now dive into a case study with a pretty common example that’d resonate with most towards understanding these 2 routes of influence:
CASE STUDY: BUYING A HOUSE
1. CENTRAL ROUTE
When buying a house, what do most people consider important? What parameters to they come down hard on with their analysis? Although some of them could be totally subjective to geography, some parameters that most analyze broadly are:
Location
Price
Finance
Appreciation likelihood
Build quality
Amenities
Accessibility
Most tend to spend weeks or even months in some cases researching because the decision carries high consequences. Merely coming up with catchy slogan may not be enough to persuade them.
2. PERIPHERAL ROUTE
Research studies has proven that most people do not get into stuff like Finance, build quality when they set out to purchasing a house. They rather visualize or pay heed to one or all of these parameters:
Coziness
Luxurious / Grandeur
Illusion of Spaciousness
Possession date
Builder profile
Social Proof (Celebrities living there)
Lifestyle aspirations (sunsets, view from the balcony, clubhouse parties)
The Most Important Question Now…
So now that you’ve understood the brilliance of a model like the ELM & given the 2 routes which one would you now stick to as a product / marketing person?
You ought to have landed one important realization here. There’s no visible guarantee as to how a person would perceive a message shown to them over an advert. It is quite possible that the very same person can use either route depending on the parameters they consider / perceive as important. And to each their own obviously. A highly analytical engineer may deeply research laptops but buy shampoo or ice-cream impulsively. A careful investor may still choose restaurants based on aesthetics or locality when the spread on offer could drop pretty lower or even get ignored. Human beings constantly tend to shift between deep reasoning & mental shortcuts, which is why persuasion ought to depend not only on the message itself but also on:
Motivation
Attention
Cognitive ability
Emotional state
Context &
Relevance
The whole point is you don’t really know how & what people use to arrive at the decisions. Which route do they use could be a question that goes unanswered. But at the end of it all, what ought to matter is whether you as a product team are tapping into all those channels.
The more personally important something feels, the more central-route processing happens. But OTOH, if a message seems too technical, confusing, fast or overwhelming they may default to peripheral cues.
When attitudes formed through the central route are much harder to change as people feel they arrived at the conclusion themselves through reasoning the peripheral-route persuasion often fades quickly because a celebrity endorsement may only manage to create a temporary excitement.
A common misunderstanding is assuming peripheral persuasion is “bad” or “weak.” NO. It is not. Modern digital ecosystems are practically built around peripheral cues & one is always under pressure to generate great engaging content as most online decisions tend to happen rapidly. In attention-scarce environments, peripheral persuasion often dominates the central route.
ELM in the AI Age
Given the AI era one is witnessing an exodus of products mushrooming all throughout the world. Situations as of today dramatically amplify peripheral persuasion as users face an information overload. As a result, platforms tend to reward instant emotional hooks, visual appeal, viral cues, short-form engagement & social validation.
But you know what the interesting part is? High-ticket or high-risk decisions still trigger central-route processing. People may discover products through peripheral cues but mostly convert through spells of central reasoning.
For ex.
A founder may first see a SaaS product through a LinkedIn post that catches their eye for some reason.
But then they would dive into multiple spells of evaluation over parameters like pricing, integrations, demos, case studies & ROI before they end up subscribing / taking a trial.
This is why it is imperative for product teams to combine & use both those routes strategically doing away with the “which one is better” or “which one do we choose” debate. In business, product management, leadership, branding, marketing & even over everyday conversations, ELM offers a powerful lens into how humans truly make decisions, leaving us with what is perhaps the most important lesson: