# Influence, New and Expanded: The Psychology of Persuasion

> Robert Cialdini's classic behavioral science book detailing the seven universal principles of persuasion.

This expanded edition of Robert Cialdini's foundational book explores why people say yes and how behavioral science drives compliance. It breaks down universal psychological triggers—adding the newer principle of Unity to the original six—to explain ethical persuasion and defense against manipulative sales tactics. It is widely considered essential reading for understanding buyer behavior, marketing, and negotiation.

Website: https://harpercollins.com/products/influence-new-and-expanded-robert-b-cialdini

## What it is for

- Design ethical conversion tactics for landing pages and marketing funnels
- Strengthen sales pitch messaging using social proof and reciprocity
- Recognize and defend against manipulative compliance and high-pressure sales techniques
- Improve professional negotiation and workplace communication

## Features

- Detailed analysis of the seven core principles: Reciprocation, Commitment and Consistency, Social Proof, Liking, Authority, Scarcity, and Unity
- Evidence-based insights drawn from 35 years of peer-reviewed behavioral research and field studies
- Updated real-world case studies and online digital applications
- Actionable defenses against unethical persuasion tactics

## Pricing

Paid. $35.00 hardcover list price (also available in e-book and audiobook)

## Details

- Type: Article or course
- Category: [Marketing & Sales](https://xiry.app/topics/marketing-sales.md)
- Open source: no
- Platforms: other
- For: Marketers, sales professionals, entrepreneurs, negotiators, and anyone interested in human decision-making.
- Alternative to: Pre-Suasion by Robert Cialdini, Never Split the Difference by Chris Voss, Thinking, Fast and Slow by Daniel Kahneman
- Tags: persuasion, psychology, behavioral science, sales, marketing, books

## Why it was saved

- [@champtgram, 19 May 2024](https://www.instagram.com/reel/C7IZN6yMabi/): Teaches fundamental psychological principles to help understand consumer behavior, build trust, and persuade prospects to buy.

## Related

- [Influence: The Psychology of Persuasion](https://xiry.app/resources/influence-the-psychology-of-persuasion): Seminal psychology book examining why people say yes and compliance triggers. (Article or course, Paid)
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- [Scientific Advertising](https://xiry.app/resources/scientific-advertising): Classic 1923 foundational book on direct response marketing and copywriting (Article or course, Free)
- [The 12 Most Persuasive Words & Power Phrases](https://xiry.app/resources/the-12-most-persuasive-words-and-power-phrases): A reference guide to high-impact words and phrases for persuasion. (Tip, Free)

Updated 3 October 2026. Page: https://xiry.app/resources/influence-new-and-expanded-the-psychology-of-persuasion

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