Keynote lectures

Akiyoshi KITAOKA, web page
Ritsumeikan University, Japan

Two types of spatial color mixtures and color illusions

There are two types of spatial color mixtures in vision as well as in displays. The additive color mixture follows the highest luminance rule whereas the subtractive one conforms to the lowest luminance rule. A close relationship to a variety of color illusions including the Munker illusion is pointed out. The histogram equalization hypothesis (Shapiro, Hedjar, Dixon and Kitaoka 2018) on the color illusion depending on the additive color change is also discussed.

Examples are shown in the webpage.

Kai Ruggeri, Columbia University, USA

Financial choice and population well-being: Replicating behavioral insights for public policy in Serbia

The rapid growth in influence of psychological insights in public policy continues globally. Much of this work involves linking validated interventions from experimental behavioral sciences to macro-level issues identified from large-scale data sources. For example, we evaluated well-being in 21 countries in Europe before and after the economic crisis using the European Social Survey, linking with areas of concern such as health behaviors, education, employment, and financial choice. As Serbia did not participate in collecting those data, we attempted to replicate findings in 2019. We also replicated three behavioral interventions linked to financial decision-making based on nudging (encouraging optimal choices without mandating them) and boosting (eliciting improved choices through training). We show why empirical study of complex behavioral patterns, particularly related to financial choice under uncertainty, has critical implications for policy and the well-being of populations, specifically Serbia.

Kai Ruggeri is an Assistant Professor in the Department of Health Policy and Management at Columbia University. His research is on how utilizing behavioral insights across populations can inform policies to improve well-being. He received his PhD in psychology from Queen’s University, Belfast. He was previously the director of the Policy Research Group in the Department of Psychology at the University of Cambridge, where he remains a Senior Fellow in the Judge Business School and a Fellow of Corpus Christi College.