Order effects in persuasion
Also known as: Primacy-recency in persuasion
Whether the first or last argument wins depends on timing.
What it means
The finding that the order in which competing arguments are presented affects which prevails, splitting into a primacy effect (the first message dominates) and a recency effect (the last does). Primacy tends to win when the two messages are heard back-to-back and the decision comes later, because the first frames interpretation of the second; recency tends to win when a delay separates the messages and the decision follows immediately, because the last is freshest in memory. Audience involvement, fatigue, and the gap between messages all tip the balance. It matters for structuring debates, pitches, courtroom arguments, and ad sequencing.
Examples
In a sales meeting, the vendor who presents last, right before the decision, often enjoys a recency advantage.
In a debate where both sides speak in one sitting and the vote comes a week later, the opening speaker usually wins: their framing quietly tells the room how to hear the rival.
A jury hearing the prosecution on Monday, the defence on Friday, then retiring at once is a recency setup. Hear both in one morning and decide next month, and the opening frame holds.
First described in Carl Hovland and the Yale program (1957); Miller & Campbell (1959).