Robert Cialdini - Influence: The Psychology of Persuasion

This book is dedicated to Chris, who glows in his father's eye

I can admit it freely now. All my life I've been a patsy. For as long as I can recall, I've been an easy mark for the pitches of peddlers, fundraisers, and operators of one sort or another. True, only some of these people have had dishonorable motives. The othersrepresentatives of certain charitable agencies, for instancehave had the best of intentions. No matter. With personally disquieting frequency, I have always found myself in possession of unwanted magazine subscriptions or tickets to the sanitation workers' ball. Probably this long-standing status as sucker accounts for my interest in the study of compliance: Just what are the factors that cause one person to say yes to another person? And which techniques most effectively use these factors to bring about such compliance? I wondered why it is that a request stated in a certain way will be rejected, while a request that asks for the same favor in a slightly different fashion will be successful.

So in my role as an experimental social psychologist, I began to do research into the psychology of compliance. At first the research took the form of experiments performed, for the most part, in my laboratory and on college students. I wanted to find out which psychological principles influence the tendency to comply with a request. Right now, psychologists know quite a bit about these principleswhat they are and how they work. I have characterized such principles as weapons of influence and will report on some of the most important in the upcoming chapters.

After a time, though, I began to realize that the experimental work, while necessary, wasn't enough. It didn't allow me to judge the importance of the principles in the world beyond the psychology building and the campus where I was examining them. It became clear that if I was to understand fully the psychology of compliance, I would need to broaden my scope of investigation. I would need to look to the compliance professionalsthe people who had been using the principles on me all my life. They know what works and what doesn't; the law of survival of the fittest assures it. Their business is to make us comply, and their livelihoods depend on it. Those who don't know how to get people to say yes soon fall away; those who do, stay and flourish.

Of course, the compliance professionals aren't the only ones who know about and use these principles to help them get their way. We all employ them and fall victim to them, to some degree, in our daily interactions with neighbors, friends, lovers, and offspring. But the compliance practitioners have much more than the vague and amateurish understanding of what works than the rest of us have. As I thought about it, I knew that they represented the richest vein of information about compliance available to me. For nearly three years, then, I combined my experimental studies with a decidedly more entertaining program of systematic immersion into the world of compliance professionalssales operators, fund-raisers, recruiters, advertisers, and others.

The purpose was to observe, from the inside, the techniques and strategies most commonly and effectively used by a broad range of compliance practitioners. That program of observation sometimes took the form of interviews with the practitioners themselves and sometimes with the natural enemies (for example, police buncosquad officers, consumer agencies) of certain of the practitioners. At other times it involved an intensive examination of the written materials by which compliance techniques are passed down from one generation to anothersales manuals and the like.

Most frequently, though, it has taken the form of participant observation. Participant observation is a research approach in which the researcher becomes a spy of sorts. With disguised identity and intent, the investigator infiltrates the setting of interest and becomes a full-fledged participant in the group to be studied. So when I wanted to learn about the compliance tactics of encyclopedia (or vacuum-cleaner, or portrait-photography, or dance-lesson) sales organizations, I would answer a newspaper ad for sales trainees and have them teach me their methods. Using similar but not identical approaches, I was able to penetrate advertising, public-relations, and fund-raising agencies to examine their techniques. Much of the evidence presented in this book, then, comes from my experience posing as a compliance professional, or aspiring professional, in a large variety of organizations dedicated to getting us to say yes.

One aspect of what I learned in this three-year period of participant observation was most instructive. Although there are thousands of different tactics that compliance practitioners employ to produce yes, the majority fall within six basic categories. Each of these categories is governed by a fundamental psychological principle that directs human behavior and, in so doing, gives the tactics their power. The book is organized around these six principles, one to a chapter. The principlesconsistency, reciprocation, social proof, authority, liking, and scarcityare each discussed in terms of their function in the society and in terms of how their enormous force can be commissioned by a compliance professional who deftly incorporates them into requests for purchases, donations, concessions, votes, assent, etc. It is worthy of note that I have not included among the six principles the simple rule of material self-interestthat people want to get the most and pay the least for their choices. This omission does not stem from any perception on my part that the desire to maximize benefits and minimize costs is unimportant in driving our decisions. Nor does it come from any evidence I have that compliance professionals ignore the power of this rule. Quite the opposite: In my investigations, I frequently saw practitioners use (sometimes honestly, sometimes not) the compelling "I can give you a good deal" approach. I choose not to treat the material selfinterest rule separately in this book because I see it as a motivational given, as a goes-without-saying factor that deserves acknowledgment but not extensive description.

Finally, each principle is examined as to its ability to produce a distinct kind of automatic, mindless compliance from people, that is, a willingness to say yes without thinking first. The evidence suggests that the ever-accelerating pace and informational crush of modern life will make this particular form of unthinking compliance more and more prevalent in the future. It will be increasingly important for the society, therefore, to understand the how and why of automatic influence.

It has been some time since the first edition of Influence was published.

In the interim, some things have happened that I feel deserve a place in this new edition. First, we now know more about the influence process than before. The study of persuasion, compliance, and change has advanced, and the pages that follow have been adapted to reflect that progress. In addition to an overall update of the material, I have included a new feature that was stimulated by the responses of prior readers.

That new feature highlights the experiences of individuals who have read Influence, recognized how one of the principles worked on (or for) them in a particular instance, and wrote to me describing the event. Their descriptions, which appear in the Reader's Reports at the end of each chapter, illustrate how easily and frequently we can fall victim to the pull of the influence process in our everyday lives.

I wish to thank the following individuals whoeither directly or through their course instructorscontributed the Reader's Reports used in this edition: Pat Bobbs, Mark Hastings, James Michaels, Paul R. Nail, Alan J. Resnik, Daryl Retzlaff, Dan Swift, and Karla Vasks. In addition, I would like to invite new readers to submit similar reports for possible publication in a future edition. They may be sent to me at the Department of Psychology, Arizona State University, Tempe, AZ 85287-1104.