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What Is Truth Decay?

• Truth Decay is defined as a set of four related trends: increasing disagreement about facts and analytical interpretations of facts and data; a blurring of the line between opinion and fact; an increase in the relative volume, and resulting influence, of opinion and personal experience over fact; and declining trust in formerly respected sources of factual information.

Is Truth Decay New?

• This report explores three historical eras — the 1890s, 1920s, and 1960s — for evidence of the four Truth Decay trends and compares those eras with the past two decades (2000s–2010s). Two of the four trends occurred in earlier periods: the blurring of the line between opinion and fact and an increase in the relative volume, and resulting influence, of opinion over fact. Declining trust in institutions, while evident in previous eras, is more severe today. No evidence of an increase in disagreement about facts and analytical interpretations of facts and data was seen in the earlier periods.

What Causes Truth Decay?

• Four drivers, or causes, of Truth Decay are described: cognitive bias, changes in the information system (including the rise of social media and the 24-hour news cycle), competing demands on the educational system that limit its ability to keep pace with changes in the information system, and political, sociodemographic, and economic polarization. Various agents also amplify Truth Decay's trends.

What Are the Consequences?

• The consequences of Truth Decay manifest in many ways. The most damaging effects might be the erosion of civil discourse, political paralysis, alienation and disengagement of individuals from political and civic institutions, and uncertainty about U.S. policy.

Over the past two decades, national political and civil discourse in the United States has been characterized by "Truth Decay," defined as a set of four interrelated trends: an increasing disagreement about facts and analytical interpretations of facts and data; a blurring of the line between opinion and fact; an increase in the relative volume, and resulting influence, of opinion and personal experience over fact; and lowered trust in formerly respected sources of factual information. These trends have many causes, but this report focuses on four: characteristics of human cognitive processing, such as cognitive bias; changes in the information system, including social media and the 24-hour news cycle; competing demands on the education system that diminish time spent on media literacy and critical thinking; and polarization, both political and demographic. The most damaging consequences of Truth Decay include the erosion of civil discourse, political paralysis, alienation and disengagement of individuals from political and civic institutions, and uncertainty over national policy.

This report explores the causes and consequences of Truth Decay and how they are interrelated, and examines past eras of U.S. history to identify evidence of Truth Decay's four trends and observe similarities with and differences from the current period. It also outlines a research agenda, a strategy for investigating the causes of Truth Decay and determining what can be done to address its causes and consequences.

• Chapter One

  Introduction

• Chapter Two

  Truth Decay's Four Trends

• Chapter Three

  Historical Context: Is Truth Decay New?

• Chapter Four

  Drivers: What Is Causing Truth Decay?

• Chapter Five

  The Consequences of Truth Decay

• Chapter Six

  The Road to Solutions: A Research Agenda

• Appendix

  Additional Information About Our Methodology