Sludge Toolkit


About: “Sludge audits are a way to identify, quantify and remove sludge (unnecessary frictions) from government services. Using the NSW Government sludge audit method, you can

  • understand where sludge is making your government service difficult to access
  • quantify the impact of sludge on the community
  • know where and how you can improve your service using behavioural science
  • measure the impact of your service improvements…(More)”.

Third Millennium Thinking: Creating Sense in a World of Nonsense


Book by Saul Perlmutter, John Campbell and Robert MacCoun: “In our deluge of information, it’s getting harder and harder to distinguish the revelatory from the contradictory. How do we make health decisions in the face of conflicting medical advice? Does the research cited in that article even show what the authors claim? How can we navigate the next Thanksgiving discussion with our in-laws, who follow completely different experts on the topic of climate change?

In Third Millennium Thinking, a physicist, a psychologist, and a philosopher introduce readers to the tools and frameworks that scientists have developed to keep from fooling themselves, to understand the world, and to make decisions. We can all borrow these trust-building techniques to tackle problems both big and small.

Readers will learn: 

  • How to achieve a ground-level understanding of the facts of the modern world
  • How to chart a course through a profusion of possibilities  
  • How to work together to take on the challenges we face today
  • And much more

Using provocative thought exercises, jargon-free language, and vivid illustrations drawn from history, daily life, and scientists’ insider stories, Third Millennium Thinking offers a novel approach for readers to make sense of the nonsense…(More)”

The Power of Noticing What Was Always There


Book by Tali Sharot and Cass R. Sunstein: “Have you ever noticed that what is thrilling on Monday tends to become boring on Friday? Even exciting relationships, stimulating jobs, and breathtaking works of art lose their sparkle after a while. People stop noticing what is most wonderful in their own lives. They also stop noticing what is terrible. They get used to dirty air. They stay in abusive relationships. People grow to accept authoritarianism and take foolish risks. They become unconcerned by their own misconduct, blind to inequality, and are more liable to believe misinformation than ever before.

But what if we could find a way to see everything anew? What if you could regain sensitivity, not only to the great things in your life, but also to the terrible things you stopped noticing and so don’t try to change?

Now, neuroscience professor Tali Sharot and Harvard law professor (and presidential advisor) Cass R. Sunstein investigate why we stop noticing both the great and not-so-great things around us and how to “dishabituate” at the office, in the bedroom, at the store, on social media, and in the voting booth. This groundbreaking work, based on decades of research in the psychological and biological sciences, illuminates how we can reignite the sparks of joy, innovate, and recognize where improvements urgently need to be made. The key to this disruption—to seeing, feeling, and noticing again—is change. By temporarily changing your environment, changing the rules, changing the people you interact with—or even just stepping back and imagining change—you regain sensitivity, allowing you to more clearly identify the bad and more deeply appreciate the good…(More)”.

Manipulation by design


Article by Jan Trzaskowski: “Human behaviour is affected by architecture, including how online user interfaces are designed. The purpose of this article is to provide insights into the regulation of behaviour modification by the design of choice architecture in light of the European Union data protection law (GDPR) and marketing law (UCPD). It has become popular to use the term ‘dark pattern’ (also ‘deceptive practices’) to describe such practices in online environments. The term provides a framework for identifying and discussing ‘problematic’ design practices, but the definitions and descriptions are not sufficient in themselves to draw the fine line between legitimate (lawful) persuasion and unlawful manipulation, which requires an inquiry into agency, self-determination, regulation and legal interpretation. The main contribution of this article is to place manipulative design, including ‘dark patterns’, within the framework of persuasion (marketing), technology (persuasive technology) and law (privacy and marketing)…(More)”.

Knightian Uncertainty


Paper by Cass R. Sunstein: “In 1921, John Maynard Keynes and Frank Knight independently insisted on the importance of making a distinction between uncertainty and risk. Keynes referred to matters about which “there is no scientific basis on which to form any calculable probability whatever.” Knight claimed that “Uncertainty must be taken in a sense radically distinct from the familiar notion of Risk, from which it has never been properly separated.” Knightian uncertainty exists when people cannot assign probabilities to imaginable outcomes. People might know that a course of action might produce bad outcomes A, B, C, D, and E, without knowing much or anything about the probability of each. Contrary to a standard view in economics, Knightian uncertainty is real. Dogs face Knightian uncertainty; horses and elephants face it; human beings face it; in particular, human beings who make policy, or develop regulations, sometimes face it. Knightian uncertainty poses challenging and unresolved issues for decision theory and regulatory practice. It bears on many problems, potentially including those raised by artificial intelligence. It is tempting to seek to eliminate the worst-case scenario (and thus to adopt the maximin rule), but serious problems arise if eliminating the worst-case scenario would (1) impose high risks and costs, (2) eliminate large benefits or potential “miracles,” or (3) create uncertain risks…(More)”.

A synthesis of evidence for policy from behavioral science during COVID-19


Paper by Kai Ruggeri et al: “Scientific evidence regularly guides policy decisions, with behavioural science increasingly part of this process. In April 2020, an influential paper proposed 19 policy recommendations (‘claims’) detailing how evidence from behavioural science could contribute to efforts to reduce impacts and end the COVID-19 pandemic. Here we assess 747 pandemic-related research articles that empirically investigated those claims. We report the scale of evidence and whether evidence supports them to indicate applicability for policymaking. Two independent teams, involving 72 reviewers, found evidence for 18 of 19 claims, with both teams finding evidence supporting 16 (89%) of those 18 claims. The strongest evidence supported claims that anticipated culture, polarization and misinformation would be associated with policy effectiveness. Claims suggesting trusted leaders and positive social norms increased adherence to behavioural interventions also had strong empirical support, as did appealing to social consensus or bipartisan agreement. Targeted language in messaging yielded mixed effects and there were no effects for highlighting individual benefits or protecting others. No available evidence existed to assess any distinct differences in effects between using the terms ‘physical distancing’ and ‘social distancing’. Analysis of 463 papers containing data showed generally large samples; 418 involved human participants with a mean of 16,848 (median of 1,699). That statistical power underscored improved suitability of behavioural science research for informing policy decisions. Furthermore, by implementing a standardized approach to evidence selection and synthesis, we amplify broader implications for advancing scientific evidence in policy formulation and prioritization…(More)”

Narrative Corruptions


Review by Mike St. Thomas: “…The world outside academia has grown preoccupied with narrative recently. Despite the rise of Big Data (or perhaps because of it), we are more keenly aware of how we use stories to explain what happens in the world, wield political power, and understand ourselves. And we are discovering that these stories can be used for good or ill. From the resurgence of nationalism on the right to the rise of identity politics on the left, the stories we tell about ourselves matter a great deal. As marketing guru Annette Simmons puts it, “Whoever tells the best story wins.” The result has been, in part, the current polarization in American life. An obvious example is the persistence of the false narrative of a stolen election, but at a deeper level, more than ever we now seem inclined—conditioned, even—to judge everything with an up or down vote.

Brooks is less than thrilled about these developments. “It was as if a fledgling I had nourished had become a predator devouring reality in the name of story,” he writes at the outset of Seduced by Story, in a clear attempt to distance himself from what he sees as the abuses of narrative in the years since Reading for the Plot was published. Though his lament contains a strain of academic pearl-clutching, Brooks’s concern is warranted. A narrative is, by nature, a hermeneutic circle—the elements of a plot gaining significance through their relation to each other—and its ever-closing loop threatening to blind its audience to the real.

Though in his new book Brooks does not back down from the claims of his old, he argues that while stories may be unavoidable, they need to be examined and critiqued constantly. A banal thesis, perhaps, but still true. After a preliminary chapter that addresses corporate storytelling and the removal of Confederate monuments, he revisits terrain covered in Reading for the Plot by examining how narratives work, using examples from Victorian-era novelists such as Honoré de Balzac, Henry James, Marcel Proust, and Sir Arthur Conan Doyle.

Within Seduced by Story are the seeds of a more trenchant claim about the ultimate purpose of storytelling—and about how our narratives have become corrupted. Brooks recalls a musical advertising slogan from his youth: “If you’ve got the time / We’ve got the beer. Miller Beer.” Jingles like this were pithy, memorable, and quite effective at communicating a quality of the product, or, more likely, at appealing to a specific emotion of the listener…(More)”.

Think, before you nudge: those who pledge to eco-friendly diets respond more effectively to a nudge


Article (and paper) by Sanchayan Banerjee: “We appreciate the incredible array of global cuisines available to us. Despite the increasing prices, we enjoy a wide variety of food options, including an abundance of meats that our grandparents could only dream of, given their limited access. However, this diverse culinary landscape comes with a price – the current food choices significantly contribute to carbon emissions and conflict with our climate objectives. Therefore, transitioning towards more eco-friendly diets is crucial.

Instead of imposing strict measures or raising costs, researchers have employed subtle “nudges”, those that gently steer individuals toward socially beneficial choices, to reduce meat consumption. These nudges aim to modify how food choices are presented to consumers without imposing choices on them. Nevertheless, expanding the use of these nudges has proven to be a complex task in general, as it sometimes raises ethical concerns about whether people are fully aware of the messages encouraging them to change their behaviour. In the context of diets which are personal, researchers have argued nudging can be ethically dubious. What business do we have in telling people what to eat?

To address these challenges, a novel approach in behavioral science, known as “nudge+”, can empower individuals to reflect on their choices and encourage meaningful shifts towards more environmentally friendly behaviours. A nudge+ is a combination of a nudge with an encouragement to think…(More)”.

Seven routes to experimentation in policymaking: a guide to applied behavioural science methods


OECD Resource: “…offers guidelines and a visual roadmap to help policymakers choose the most fit-for-purpose evidence collection method for their specific policy challenge.

Source: Elaboration of the authors: Varazzani, C., Emmerling. T., Brusoni, S., Fontanesi, L., and Tuomaila, H., (2023), “Seven routes to experimentation: A guide to applied behavioural science methods,” OECD Working Papers on Public Governance, OECD Publishing, Paris. Note: The authors elaborated the map based on a previous map ideated, researched, and designed by Laura Castro Soto, Judith Wagner, and Torben Emmerling (sevenroutes.com).

The seven applied behavioural science methods:

  • Randomised Controlled Trials (RCTs) are experiments that can demonstrate a causal relationship between an intervention and an outcome, by randomly assigning individuals to an intervention group and a control group.
  • A/B testing tests two or more manipulations (such as variants of a webpage) to assess which performs better in terms of a specific goal or metric.
  • Difference-in-Difference is an experimental method that estimates the causal effect of an intervention by comparing changes in outcomes between an intervention group and a control group before and after the intervention.
  • Before-After studies assess the impact of an intervention or event by comparing outcomes or measurements before and after its occurrence, without a control group.
  • Longitudinal studies collect data from the same individuals or groups over an extended period to assess trends over time.
  • Correlational studies help to investigate the relationship between two or more variables to determine if they vary together (without implying causation).
  • Qualitative studies explore the underlying meanings and nuances of a phenomenon through interviews, focus group sessions, or other exploratory methods based on conversations and observations…(More)”.

Disaster preparedness: Will a “norm nudge” sink or swim?


Article by Jantsje Mol: “In these times of unprecedented climate change, one critical question persists: how do we motivate homeowners to protect their homes and loved ones from the ever-looming threat of flooding? This question led to a captivating behavioral science study, born from a research visit to the Wharton Risk Management and Decision Processes Center in 2019 (currently the Wharton Climate Center). Co-founded and co-directed by the late Howard Kunreuther, the Center has been at the forefront of understanding and mitigating the impact of natural disasters. In this study, we explored the potential of social norms to boost flood preparedness among homeowners. While the results may not align with initial expectations, they shed light on the complexities of human behavior, the significance of meticulous testing, and the enduring legacy of a visionary scholar.

The Power of Social Norms

Before we delve into the results, let’s take a moment to understand what social norms are and why they matter. Social norms dictate what is considered acceptable or expected in a given community. A popular behavioral intervention based on social norms is a norm-nudge: reading information about what others do (say, energy saving behavior of neighbors or tax compliance rates of fellow citizens) may adjust one’s own behavior closer. Norm-nudges are cheap, easy to implement and less prone to political resistance than traditional interventions such as taxes, but they might be ineffective or even backfire. Norm-nudges have been applied to health, finance and the environment, but not yet to the context of natural disaster risk-reduction…(More)”.