Dr Marie Juanchich

Senior Lecturer
Department of Psychology
Dr Marie Juanchich



I am interested in empowering people to make better decisions. My main research goal is to develop better uncertainty communication methods to help people make better-informed decisions. For example, I evaluate whether different weather forecast formats reduce weather misinterpretations and how different framing of climate change uncertainty affects decision-making quality and trust.


  • PhD in Psychology

  • Master's in Psychology University of Toulouse II - Le Mirail,


University of Essex

  • Director of impact, Psychology, University of Essex (1/2/2016 - present)

Research and professional activities

Conferences and presentations

Low energy or 20% calories? How quantifier format moderates the framing effect.

Invited presentation, Decisions, Attitudes, Risk & Thinking (DART) Seminar series, London, United Kingdom, 2018

Eye-tracking evidence for differences in the processing of verbal or numerical quantified phrases.

European Group of Process Tracing Conference, Aarhus, Denmark, 2018

Quantifiers matter in attribute framing: Effects of magnitude and directionality.

ESCON Transfer of Knowledge Conference, Cologne, Germany, 2018

Consumer misinterpretations of verbal nutrition quantities.

British Psychological Society Division of Health Psychology Annual Conference, Newcastle, United Kingdom, 2018

Activity labels do not prime exercise more than calorie labels.

Experimental Psychology Society Meeting, London, United Kingdom, 2017

Intuitive words and analytical numbers: Decisions with GDAs

Summer Institute for Bounded Rationality, Berlin, Germany, 2017

Want to prime exercise? Calorie labels work better than activity ones!

Cognitive Science Society Annual Conference, London, United Kingdom, 2017

Verbal and numerical labels and the heuristics of food quantity decision.

26th Subjective Probability, Utility, and Decision Making Conference, Haifa, Israel, 2017

Framing our food: Does it matter if we use words or numbers?

University of Essex Ada Lovelace Day event, Colchester, United Kingdom, 2017

Do you like it better presented as activity or calories? It depends on the food.

Society for Judgment & Decision Making Annual Conference, Boston, 2016

Teaching and supervision

Current teaching responsibilities

  • Research Methods in Psychology (PS114)

  • Special Topics in Social Psychology (PS933)

  • Judgement and Decision-making (PS512)

  • Enhancing employability and career planning (PS417)

  • Advanced employability skills and career progression (PS492)


Journal articles (33)

LIU, D., Juanchich, M., Sirota, M. and Orbell, S., The intuitive use of contextual information in decisions made with verbal and numerical quantities. Quarterly Journal of Experimental Psychology

Juanchich, M., Sirota, M. and Bonnefon, J-F., (2019). The polite wiggle-room effect in charity donation decisions. Journal of Behavioral Decision Making. 32 (2), 179-193

Sirota, M. and Juanchich, M., (2019). Ratio format shapes health decisions: The practical significance of the "1-in-X" effect. Medical Decision Making. 39 (1), 32-40

Juanchich, M. and Sirota, M., (2019). Not as gloomy as we thought Reassessing how the public understands probability of precipitation forecasts. Journal of Cognitive Psychology. 31 (1), 116-129

Walasek, L., Juanchich, M. and Sirota, M., (2019). Adaptive cooperation in the face of social exclusion. Journal of Experimental Social Psychology. 82, 35-46

Sirota, M., Juanchich, M., Petrova, D., Garcia-Retamero, R., Walasek, L. and Bhatia, S., (2018). Health professionals prefer to communicate risk-related numerical information using "1-in-X" ratios. Medical Decision Making. 38 (3), 366-376

Juanchich, M., Walasek, L. and Sirota, M., (2018). Decision-makers are resilient in the face of social exclusion. British Journal of Psychology. 109 (3), 604-630

Sirota, M. and Juanchich, M., (2018). Effect of response format on cognitive reflection: Validating a two- and four-option multiple choice question version of the Cognitive Reflection Test. Behavior Research Methods. 50 (6), 2511-2522

Sirota, M., Juanchich, M. and Bonnefon, J-F., (2018). 1-in-X" bias: "1-in-X" format causes overestimation of health-related risks. Journal of Experimental Psychology: Applied. 24 (4), 431-439

Liu, D. and Juanchich, MMG., (2018). Conceptual understanding and quantity inferences: A new framework for examining consumer understanding of food energy.. Public Health Nutrition. 21 (17), 3168-3177

Navarrete, G., Correia, R., Sirota, M., Juanchich, M. and Huepe, D., (2017). Doctor, what does my positive test mean? From Bayesian textbook tasks to personalized risk communication. Frontiers in Psychology. 6, 1327-

Juanchich, MMG., Gourdon-Kanhukamwe, A. and Sirota, M., (2017). “I am uncertain” vs “It is uncertain”. How linguistic markers of the uncertainty source affect uncertainty communication. Judgment and Decision Making. 12 (5), 445-465

Juanchich, MMG. and Sirota, M., (2017). How Much Will the Sea Level Rise? Outcome Selection and Subjective Probability in Climate Change Predictions. Journal of Experimental Psychology: Applied. 23 (4), 386-402

Juanchich, M. and Sirota, M., (2016). How to improve people's interpretation of probabilities of precipitation. Journal of Risk Research. 19 (3), 388-404

Juanchich, M., Dewberry, C., Sirota, M. and Narendran, S., (2016). Cognitive Reflection Predicts Real-Life Decision Outcomes, but Not Over and Above Personality and Decision-Making Styles. Journal of Behavioral Decision Making. 29 (1), 52-59

Sirota, M. and Juanchich, M., (2015). A direct and comprehensive test of two postulates of politeness theory applied to uncertainty communication. Judgment and Decision Making. 10 (3), 232-240

Vall�e-Tourangeau, G., Sirota, M., Juanchich, M. and Vall�e-Tourangeau, F., (2015). Beyond getting the numbers right: what does it mean to be a "successful" Bayesian reasoner?. Frontiers in Psychology. 6 (712), 712-

Sirota, M., Kostovičová, L. and Juanchich, M., (2014). The effect of iconicity of visual displays on statistical reasoning: evidence in favor of the null hypothesis. Psychonomic Bulletin & Review. 21 (4), 961-968

Sirota, M., Juanchich, M., Kostopoulou, O. and Hanak, R., (2014). Decisive Evidence on a Smaller-Than-You-Think Phenomenon. Medical Decision Making. 34 (4), 419-429

Sirota, M., Juanchich, M. and Hagmayer, Y., (2014). Ecological rationality or nested sets? Individual differences in cognitive processing predict Bayesian reasoning. Psychonomic Bulletin & Review. 21 (1), 198-204

Teigen, KH., Juanchich, M. and Filkuková, P., (2014). Verbal Probabilities: An Alternative Approach. Quarterly Journal of Experimental Psychology. 67 (1), 124-146


Dewberry, C., Juanchich, M. and Narendran, S., (2013). Decision-making competence in everyday life: The roles of general cognitive styles, decision-making styles and personality. Personality and Individual Differences. 55 (7), 783-788

Juanchich, M. and Sirota, M., (2013). Do people really say it is “likely” when they believe it is only “possible”? Effect of politeness on risk communication. Quarterly Journal of Experimental Psychology. 66 (7), 1268-1275

Juanchich, M., Halvor Teigen, K. and Gourdon, A., (2013). Top scores are possible, bottom scores are certain (and middle scores are not worth mentioning): A pragmatic view of verbal probabilities. Judgment and Decision Making. 8 (3), 345-364

Juanchich, M., Sirota, M., Karelitz, TM. and Villejoubert, G., (2013). Can membership-functions capture the directionality of verbal probabilities?. Thinking & Reasoning. 19 (2), 231-247

Teigen, KH., Juanchich, M. and Riege, AH., (2013). Improbable outcomes: Infrequent or extraordinary?. Cognition. 127 (1), 119-139

Dewberry, C., Juanchich, M. and Narendran, S., (2013). The latent structure of decision styles. Personality and Individual Differences. 54 (5), 566-571

Sirota, M. and Juanchich, M., (2012). Risk Communication on Shaky Ground. Science. 338 (6112), 1286-1287

Sirota, M. and Juanchich, M., (2012). To what extent do politeness expectations shape risk perception? Even numerical probabilities are under their spell!. Acta Psychologica. 141 (3), 391-399

Juanchich, M., Sirota, M. and Butler, CL., (2012). The perceived functions of linguistic risk quantifiers and their effect on risk, negativity perception and decision making. Organizational Behavior and Human Decision Processes. 118 (1), 72-81

Sirota, M. and Juanchich, M., (2011). Role of numeracy and cognitive reflection in bayesian reasoning with natural frequencies. Studia Psychologica. 53 (2), 151-161

Juanchich, M., Teigen, KH. and Villejoubert, G., (2010). Is guilt ‘likely’ or ‘not certain’?. Acta Psychologica. 135 (3), 267-277

Conferences (1)

LIU, D. and Juanchich, M., Want to prime exercise? Calorie labels work better than activity ones!

Grants and funding


Framing with words and numbers: Investigating the effect of verbal or numerical quantifiers on the framing effect

Experimental Psychology Society

Rationally irrational: When people don�t correct errors in their reasoning

Leverhulme Trust


How Professional Supervision Can Best Influence the Quality of Social Work Decisions


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4.718, Colchester Campus