Research library Required reading Why people say yes
Expensive Equals Good. Click, Whirr.
Robert Cialdini spent nearly three years inside sales and advertising training to learn why people say yes. His principles explain a lot of marketing. A few of his stories explain a lot about signals and quotas.
Robert B. Cialdini · Influence: The Psychology of Persuasion · 1984
What it is
A psychologist’s account of why people comply. Alongside his experiments, Cialdini went undercover:
“For nearly three years, then, I combined my experimental studies with a decidedly more entertaining program of systematic immersion into the world of compliance professionals—sales operators, fund-raisers, recruiters, advertisers, and others.” Introduction
What he found sorted into six principles, one per chapter: reciprocation, commitment and consistency, social proof, liking, authority and scarcity. That’s the edition we learned from (1984, revised since). The 2021 edition, Influence, New and Expanded, adds a seventh, unity.
What we took from it
The principles are useful on their own. What stayed with us is the idea underneath them: people take shortcuts. A single feature stands in for the whole decision, and the response fires automatically. Cialdini’s name for it is “click, whirr.”
His first example is a jewelry store in Arizona whose turquoise wouldn’t sell. Before a buying trip, the owner left a note to cut the price in half; her head saleswoman read the “½” as a “2”. The whole lot sold out at twice the original price. The buyers, mostly tourists who knew little about turquoise, were using a rule: expensive equals good.
“Price alone had become a trigger feature for quality” Chapter 1, “Weapons of Influence”
Where it shows up in our work
Price standing in for quality is a signal, and signals are what Power Law Performance is about. Economists worked out when advertising and price can honestly signal quality; Cialdini shows how readily buyers act on them, honest or not. That cuts both ways: the same shortcuts that let a good signal work are the ones a cheap imitation exploits.
He also prints a reader’s report that could be a chapter of ours. A former TV and stereo salesperson had a quota for service contracts, and “a one-year contract counted just as much toward my quota as a three-year contract did.” So the pitch led with the expensive three-year plan, let the customer turn it down, and then closed the cheap one-year plan, for a hit rate of about seventy percent against roughly forty for the rest of the department (Chapter 2). The quota got exactly what it counted.
Next on the shelf Seth Godin, All Marketers Are Liars, and his blog