When you express with certainty a particular attitude, that attitude hardens.

The opposite is true as well: Expressing uncertainty softens the attitude.

You can be influenced by stimuli that affect how you perceive short-term thoughts and actions. Here’s a really smart example from Changing Minds:

A stage magician says ‘try’ and ‘cycle’ in separate sentences in priming a person to think later of the word ‘tricycle’.

Persuasive messages tend to decrease in persuasiveness over time, except for messages from low-credibility sources.

Messages that start out with low persuasion gain persuasion as our minds slowly disassociate the source from the material (i.e., a presumably sleazy car ...

This approach, based on multiple years of research by Yale University, found a number of factors in persuasive speech, including being a credible, attractive speaker; when it’s important to first or go last; and the ideal demographics to target.

A common social norm, reciprocity involves our obligation to return favors done by others.

Certain words carry more power than others. This theory breaks persuasive words into three categories:

• God terms: those words that carry blessings or demand obedience/sacrifice. e.g, progress, value
• Devil terms: those terms that are despised an...

This theory involves a persuasive person deliberately breaking one of the four conversational maxims. These are the four:

• Quantity: Information is complete and full.
• Quality: Information is truthful and accurate.

We are influenced strongly by others based on how we perceive our relationship with the influencer.

For example, social proof on web copy is persuasive if the testimonials and recommendations are from authoritative sources, big brands, or peers.