The 5 New Rules of Human Decision Making

For all the sophistication now built into modern marketing - sharper targeting, faster commerce, better data and more efficient media - the most important question remains deceptively simple: how do people actually decide? WPP Media’s How Humans Decide research, based on 1.1 million purchase journeys, shows that the answer starts long before the moment of purchase. Most choices are shaped by the preferences, influences and moments of receptivity that determine which brands make the shortlist in the first place. Here, five WPP leaders explore what that means for marketers rethinking media, commerce, social influence, timing and data-led growth.

Many decisions are made long before the moment of purchase - Tom DiSapia, global CSO, WPP Open X

“We keep looking for influence in the wrong place. WPP Media and Oxford's Saïd Business School tracked 1.1 million purchase journeys and found that 84% of purchases go to a brand the buyer was already biased towards. The purchase is where a preference formed much earlier becomes visible - built through conversations, recommendations, creators, communities and ordinary moments when people aren't even shopping. Word of mouth reaches a fraction of the people television reaches yet influences a greater share of purchase decisions. Earned, shared and owned touchpoints are three times as powerful as paid at the point of purchase. We over-invest in what is visible because it is easier to count. But we are fundamentally social beings. What we drink, and which brands we are willing to wear on a T-shirt, signals who we are, where we belong and what we value. The most powerful media most brands have is other people.”

Consideration Is the Real Battleground - Samantha Bukowski, global president of commerce, WPP

“Commerce has become obsessed with removing friction at the moment of purchase, and that instinct isn't wrong. The technical friction, a clunky checkout, a confusing shelf, a marketplace listing missing the one detail someone needs, genuinely costs brands sales. But friction removed at the moment of decision only matters if you're already part of the decision. Consumers rarely evaluate every option in front of them. They walk in with a shortlist already formed, built over months of small, mostly subconscious exposures that primed one brand to feel familiar and right when the need finally showed up. That shortlist is where the real battle happens, and it's remarkably hard to break into after the fact.

That's what makes consideration so easy to undervalue. It doesn't convert on a dashboard the way a promotion does, so it gets filed away as mid-funnel. But consideration is what removes the path to purchase friction that matters most: the mental fatigue of choosing at all. The smartest commerce strategies don't stop at capturing demand efficiently. They spend just as much discipline creating the conditions that make demand choose them first.”

Reach Doesn't Equal Influence - Adam Gerhart, global chief client officer, WPP Media

"For decades, marketing has treated reach as a proxy for impact. The assumption was simple: if enough people saw something, action would follow. But exposure and influence (or the ability to actually impact action or thought) are not the same thing. Some touchpoints have an extraordinary ability to shape decisions while others generate huge audiences but almost negligible behavioural impact. The challenge for most modern marketers is solely finding more consumers. It's understanding what actually changes their minds. Future media planning won't be defined by impressions, frequency or scale alone. It will be defined by influence. Because the goal isn't to put a message in front of people. The goal is to make that message matter."

Receptivity Changes Everything - Lauren Wetzel, global president, data and technology solutions, WPP

“Marketing has traditionally treated receptivity as relatively fixed: find the right audience, deliver the right message. But people don’t experience the world that way. Our openness to influence changes constantly depending on our context, mindset and what is happening around us. That means the same person can respond completely differently to the same message at different moments. For marketers, that is a profound shift. It’s no longer enough just knowing who someone is. We also need to understand when they are most receptive and what signals tell us that moment has arrived. In a world overflowing with content, relevance increasingly depends on timing as much as targeting. The brands that can understand behaviour as it changes, and respond at the speed of that behaviour, will have a significant advantage.”

Intelligence Beats Identity – Brian DeCicco, global president, data, tech and analytics, WPP Media

“For much of the digital era, marketing has been organised around identity. The objective was simple: find people, match them to IDs and optimise against what was easiest to see and measure. The problem is that when everyone relies on the same identifiers, the same signals and the same optimisation frameworks, brands become easier to target but harder to differentiate. The How Humans Decide research reminds us that decisions are not shaped by identity alone. They are shaped by predispositions, moments of receptivity and the influences people encounter throughout their lives. Those are fundamentally intelligence problems, not identity problems. AI gives marketers an opportunity to move beyond narrow, matchable datasets and connect a much richer set of signals across behaviour, culture, context, commerce and media. The advantage no longer comes from knowing more about who somebody is. It comes from understanding why they choose, when they are open to influence and where untapped opportunities for growth exist. The brands that win will not be the ones defined by how many people they know, but by how much they know about people. That’s an intelligence advantage beyond ID.”

Taken together, the five lessons point to a simple but important shift for marketers: decision-making is less linear, less rational and less controllable than many planning models assume. Brands still need reach, conversion and efficiency, but those are no longer enough on their own. The next advantage will come from understanding how preference is formed, when people are open to influence and which touchpoints genuinely change behaviour before the moment of purchase arrives.