Science Policy• 2 min readOctober 8, 2026

New Study Shows Most Americans Use Shortcuts on Complex Political Choices

A new study reveals that Americans frequently use mental shortcuts instead of deep reasoning when making complex choices about politics and policy. Just under thirty percent of participants carefully evaluated every factor in the study.

In short: A new study reveals that Americans frequently use mental shortcuts instead of deep reasoning when making complex choices about politics and policy. Just under thirty percent of participants carefully evaluated every factor in the study.

When voters head to the polls or weigh in on major policies, we often imagine them carefully reviewing every single detail before making up their minds. But a new study suggests that human brains usually take a much simpler path.

What happened, in plain words

Social scientists at UC Berkeley examined how nearly thirty-eight hundred people made decisions about political candidates, climate policies, and immigration. Instead of looking at every piece of information, researchers found that participants used mental shortcuts in sixty-eight percent of cases. Most commonly, people based their choices on a single factor that mattered most to them, while fourteen percent tallied up pluses and minuses.

Key points

  • Most people skip deep reasoning: In sixty-eight percent of the choices examined by researchers, participants relied on mental shortcuts rather than assessing all six available factors.
  • Single-factor decisions are common: Nearly fifty-four percent of the cases showed a pattern where a single factor dominated the final choice.
  • A minority do full evaluations: Just under thirty percent of the decisions involved a comprehensive review of all six factors without taking shortcuts.
  • Strategies change depending on the topic: Most participants did not stick to just one strategy; they shifted their level of effort depending on the specific domain.

Terms explained

  • Cognitive model — A computer-based tool that helps researchers study how people make decisions by analyzing patterns in their choices. Example: Studying a video game player's repeated button presses to figure out their strategy.
  • Conjoint experiment — A research method where people are asked to choose between options that are built using a mix of randomly assigned features. Example: Choosing between different imaginary vacation packages that each list a random price, destination, and weather forecast.

Why it matters

Understanding how people actually make decisions helps interpreters of public opinion look past complicated surveys. It shows that leaders and political campaigns might focus heavily on the single issue that voters care about most.

What we still don't know

The study used limited profiles with only two attributes per category, left out political parties for Senate candidates, and cannot peek directly inside a person's mind.


Based on reporting from UC Berkeley. This is an independent explainer, written in our own words with AI assistance; UC Berkeley has not reviewed or endorsed it. Read the original for the full details.