Threat perception - the conscious or unconscious estimation that something or someone is dangerous - is a basic mental faculty.  Political science has long acknowledged that perceived danger can motivate politically relevant behavior and attitudes.  But existing theories only partially integrate findings from biology and cognitive science regarding the processing of danger in the mind and brain.  The result is an incomplete, and sometimes misleading, picture of the relationship between threat perception and political behavior.

In this project, I developed and continue to test a theory of the cognitive processes that are engaged when individuals are confronted with potential dangers.  The over-arching question I investigate is: why do individuals prefer some policies over others for dealing with a particular danger that concerns them?  To answer this question, I developed Threat-Heuristic Theory (THT), which links the way in which dangers are mentally processed to the preferences individuals have for mitigating them, including preferences for specific public policies.  THT's mechanisms are species-typical features of the human mind, which enables me to test the theory's explanatory power in both ordinary citizens and political elites.

Originally structured as a three-paper dissertation ("Dealing with Danger: Threat Perception and Policy Preferences") with a number of extensions, I am now in the process of developing several stand-alone papers, as well as a book manuscript.  I will make elements of the project available here as and when I can.  Please contact me if you are interested in material not currently posted.

theory & foundations

In the working paper “Threat-Heuristic Theory: A New Model of Threat Perception and Policy Preferences” (submitted), I develop Threat-Heuristic Theory (THT). I first introduce findings from biology and cognitive science regarding the physiological and psychological systems humans have for detecting and responding to different kinds of potential harms in their environment. These potential harms include: physical violence (from humans, predators, and accidents), loss of material and non-material assets, and literal and imagined contamination. I then build a model of the mental processes linking the perception of something as dangerous to specific preferences for how that danger should be mitigated. Because dangers at the scale of large groups and societies require coordination, these danger-mitigating preferences manifest as support for certain public policies. Policy preferences are the theory’s dependent variable. The independent variable is threat classification - the rapid, unconscious mental process by which dangers are parsed as being threats of physical harm, threats of loss, or threats of contamination.  I argue that some issues, including immigration, climate change and fundamentalism, constitute complex dangers, because they are perceived as posing more than one kind of potential harm.


I illustrate the theory’s utility with the issue of immigration reform preferences in the U.S.  While the current literature focuses on explaining pro- versus anti-immigration preferences, I show that THT can provide an explanation not only for whether immigration should be restricted but also for how it should be restricted. In two studies using nationally diverse samples of U.S. adults, I show that threat classification predicts support for specific forms of immigration restriction over others - favoring wall construction rather than visa limits, for example.  I supplement these studies with an analysis of immigration-related tweets made by Donald Trump, Ted Cruz, and Marco Rubio prior to their respective 2016 presidential campaigns, demonstrating that the same theoretical model can be applied to those who generate new immigration policy.

This paper is currently under review. An older version is available here.

Neural correlates

The cognitive science research on which THT is based suggests there may be neural correlates of threat classification.  During my postdoctoral fellowship in the SaxeLab, I am investigating this possibility using fMRI. My research project aims to answer two primary questions: (1) do explicit and implicit measures of threat classification correspond for sensitive topics/targets? (2) is one a better predictor of policy preferences than the other?  


foreign policY implications

One of the most consequential domains in which subjective threat perception affects policy-making is in the formulation of national security strategy. A major focus of my research is to better explain individual decision-makers’ preferences for how to deal with a particular kind of national security problem: hostile ideologies. The dangers posed by ideologies - and the “wars of ideas” waged to defeat them - are a recurring theme in American foreign policy. This project focuses on two eras of policy-making: (1) the early Cold War (1947-1953), when strategies were developed to contend with communism; and (2) the period following September 11, 2001, when both “international terrorism” and Islamic fundamentalism were focal points of U.S. national security strategy.  I use an original corpus of Cold War documents from six archives, publicly available speech and text data, memoirs, and interviews to investigate quantitatively and qualitatively how policy makers classified ideological threats to American security and whether that classification affected their preferences for specific elements of national security strategy.

Perspective-taking & empathetic accuracy

Many theories of bargaining rely on the assumption that individuals can accurately imagine the concerns of others, even if they do not share those concerns.  THT points to one potential source of inaccuracy in this sort of exercise: the inability to accurately estimate how another person has classified a potential harm.  In several experiments, I test the perspective-taking accuracy of those who are not concerned about two potential harms (immigration and climate change). I also test their empathetic accuracy, the ability to accurately estimate another’s emotional response, on the same issues.  Issue-level variation in perspective-taking accuracy and empathetic accuracy may have implications for the tenor and content of policy debates.

misperception & false beliefs

Research into both visual and imagined perception of dangerous stimuli suggests that estimates of size become distorted for some types of threats, but not others. In work with Briony Swire-Thompson, we consider whether individuals who perceive immigrants as different kinds of threats also differ in their: (1) over-estimation of the illegal immigrant population in the U.S. and (2) in their acceptance of information correcting this over-estimation. 

other topics

Outside the American context, I am examining anti-immigrant threat perception in Europe and beginning a comparative analysis of contaminant imagery (e.g., rats) in visual war-time propaganda.