Saadi Lahlou

London School of Economics and Political Science | LSE · Department of Psychological and Behavioural Science

The Covid-19 pandemic could be a source of great anxiety, especially for those at higher risk, such as women experiencing obesity. The aim of this study was to measure how some personal characteristics such as BMI (from underweight to class 3 obesity), bariatric surgery (yes or no), comorbidities, or age (as antecedent variables), and mediating fac...

Changing consumer behaviour has potential benefits for health, the economy and the environment. Change is possible, and behavioural change has been the purpose of much research; nevertheless we can still observe limited success, as in the case of food in public policies or individual diets. One reason is that models driving behavioural change inter...

Humans are social animals living in societies with most of their activities occurring in social settings, characterized by multiple actors, the crossing of individual behavioral paths, interactions between participants themselves and between participants and material (or immaterial) setting components. We theorize that virtual conferences, like phy...

Collaboration at work is a key component for activities in complex socio-technical systems. Reviewing the scientific literature showed that collaborative work activity has been well characterized, showing that perspective-taking is a crucial feature, but no study quantifies what makes the performance of collaborative activity. Analyzing performance...

Debriefing methods are extensively used in vocational adult education after simulations, but guidelines and structured methods for conducting debriefings lag behind in the literature, even more when comes the necessity to implement them in mass. So, the problem is the following: in a context of simulation-based training, how might we conduct debrie...

A correction to this paper has been published: https://doi.org/10.1007/s10111-021-00678-9

Subjective Evidence-Based Ethnography (SEBE) is a family of methods developed in digital ethnography for investigation in social science based on subjective audio–video recordings using first-person perspective. Recordings are used for self-confrontation (collect subjective experience, discussion of findings and final interpretation). Several studi...

This paper clarifies a long-standing ambiguity in the notion of social repre-sentations; it provides a clear operational definition of the relation between social representa-tion and individual representation. This definition, grounded in the theory of sets, supports most current empirical investigation methods of social representations. In short,...

Notifications are one of the core functionalities of smartphones. Previous research suggests they can be a major disruption to the professional and private lives of users. This paper presents evidence from a mixed-methods study using first-person wearable video cameras, comprising 200 h of audio-visual first-person, and self-confrontation interview...

The aim was to test a method developed in nuclear industry applied to a simple activity, the radial artery puncture, and to assess its capacity to improve performance. The method involved digital ethnography based on the Square of PErceived ACtion model applied in real operating situation and first-person perspective video for post-analysis of the...

Eco-driving has been linked to considerable reductions in negative externalities and costs for transportation companies, employees and communities (including fuel consumption, safety and emission benefits). Nevertheless, some of the biggest challenges to its implementation are related to promoting behavioural change among drivers. This paper presen...

The objective of the present study was to confirm the link between spontaneous smiling and active sleep in newborns, and to identify the role of the cortex in the generation of spontaneous smiles. A total of 12 healthy newborns born at term and three infants with major congenital abnormalities (two with hydranencephaly and one with a left hemispher...

Qualitative video research as well as digital ethnography techniques based on video recordings are steadily increasing. The affordability of high-quality technical equipment, e.g. wearable micro-cameras, and the superior quality of video data compared to other forms of recording have given a ‘visual turn’ to social research methods that is here to...

Background Many children consume too little water and too many sugar-sweetened beverages (SSBs), with potential negative consequences for health. Sustainably increasing water intake is therefore relevant, however challenging. Objective Explore drivers of and barriers to water intake during a one-year field study aiming to increase plain water cons...

Субъективная доказательная этнография (SEBE) была определена S. Lahlou [9]: семейство методов, разработанных в цифровой этнографии для исследований в области социальных наук, основанных на субъективных аудио-видеозаписях с использованием миниатюрных видеокамер (обычно носимых на уровне глаз субъекта: subcam). Этот метод позволяет активировать памят...

To examine whether four pre-selected front-of-pack nutrition labels improve food purchases in real-life grocery shopping settings, we put 1.9 million labels on 1,266 food products in four categories in 60 supermarkets and analyzed the nutritional quality of 1,668,301 purchases using the FSA nutrient profiling score. Effect sizes were 17 times small...

To examine whether four pre-selected front-of-pack nutrition labels improve food purchases in real-life grocery shopping settings, we put 1.9 million labels on 1266 food products in four categories in 60 supermarkets and analyzed the nutritional quality of 1,668,301 purchases using the FSA nutrient profiling score. Effect sizes were 17 times smalle...

In this chapter we discuss theoretical and practical considerations when using visual methods for research. We outline the nature and origin of visuals, describe the research process around visuals, and the purpose and possible output formats of visual methods. Visuals can be produced for a research project, or a project can be built around existin...

Behavioral change interventions based on social norms have proven to be a popular and cost-effective way in which both researchers and practitioners attempt to transform behavior in order to increase environmental and social sustainability in real-world contexts. In this paper, we present a systematic review of over 90 empirical studies that have a...

Behavioral change interventions based on social norms have proven to be a popular and cost-effective way in which both researchers and practitioners attempt to transform behavior in order to increase environmental and social sustainability in real-world contexts. In this paper, we present a systematic review of over 90 empirical studies that have a...

Two studies explore the impact of body size on daily life activities of women with obesity. In the first study, ethnographic techniques (first-person perspective video recordings) and subsequent interviews based on the video recordings were used. Results showed atypical behavior of women with obesity and ex-obese women related to memories of embarr...

Urdapilleta I, Lahlou S, Demarchi S and Catheline J-M (2019) Women With Obesity Are Not as Curvy as They Think: Consequences on Their Everyday Life Behavior. Front. Psychol. 10:1854. doi: 10.3389/fpsyg.2019.01854 Two studies explore the impact of body size on daily life activities of women with obesity. In the first study, ethnographic techniques...

Abstract During childhood, the amount of food consumed, associated with adiposity and overweight risk, depends mainly on the amount of food that is served, especially by parents. This study focuses on the food amount served by parents (“Portion”), with two objectives: 1/to confirm (or not) its link with the food amount eaten (“Intake”) by their chi...

A perspectiva evolucionista das Representações Sociais considera o papel da psicologia na construção dos objetos sociais e a transmissão das representações pela cultura. Nesse contexto, a evolução das representações e objetos se dá por meio de um mecanismo de dupla seleção, na perpetuação dos mais adaptados à realidade social. Apresentamos a Teoria...

Pérez, J., Kalampalikis, N., Lahlou, S., Jodelet, D., Apostolidis, T. (2019). In memoriam: Serge Moscovici (1925-2014). In N. Kalampalikis et al. (Eds.), Serge Moscovici. Un regard sur les mondes communs (pp. 251-263). Paris, Éditions de la MSH.

Subjective Evidence-Based Ethnography (SEBE) is a family of methods developed for investigation in social science based on subjective audio-video recordings with a miniature video-camera usually worn at eye-level (eye-tracking techniques are included). Facing a lack of tools for SEBE risk assessment when applied to high risk professional environmen...

Every day, people are exposed to images of appetizing foods that can lead to high-calorie intake and contribute to overweight and obesity. Research has documented that manipulating the visual perspective from which eating is viewed helps resist temptation by altering the appraisal of unhealthy foods. However, the neural basis of this effect has not...

Installation Theory: The Societal Construction and Regulation of Behaviour provides researchers and practitioners with a simple and powerful framework to analyse and change behaviour. Informed by a wide range of empirical evidence, it includes an accessible synthesis of former theories (ecological psychology, activity theory, situated action, distr...

Simulation is traditionally used to reduce errors and their negative consequences. But according to modern safety theories, this focus overlooks the learning potential of the positive performance, which is much more common than errors. Therefore, a supplementary approach to simulation is needed to unfold its full potential. In our commentary, we de...

The SPEAC protocol using first-person perspective ethnography and subsequent replay interviews was applied to analyze work activities at a French nuclear power plant during real operating situations of Operations shift teams (15 situations and 30 participants, about 1950 min. video recordings and 2400 min. audio recordings). Results were compared w...

Objective: We investigated the effect of three interventions to increase the plain water consumption of children with unhealthy drinking habits, with an innovative approach combining the three layers of Installation Theory: embodied competences, affordances and social regulation. Methods: 334 preschool children and their carers were allocated to...

Societies nudge activity by constructing " installations " in which subjects operate. Installations suggest, scaffold and constrain what society members can/should do in a specific situation, at three levels: affordances in the environment, embodied interpretation systems in humans, social influence –direct or through institutions. Subjects are dri...

Organizational culture is averse to innovation. Some organizations are dedicated to creativity as a business (e.g. advertising, cinema or design): they nevertheless apply the classic production rules of labour division, specialism, incremental innovation and evaluation by demand. Creativity applied to organizations themselves, or to in-house proces...

This research article aims to add to current knowledge on reflection, body-worn video, and police education. It examines the potential effects of an intervention which employed subcams (a type of body-worn video) and replay interviews of video footage to enhance experiential learning during an operative training course for Norwegian police students...

This paper presents the methodological framework that we developed for collecting, studying and passing on tacit and explicit know-how embodied in professional gestures of expert workers. This framework is based upon the combination of an adaptation of a range of psychological theories and techniques: Activity Theory, the ‘perceived quality’ approa...

Introduction: Les personnes atteintes d’obésité ont une perception erronée de leur corpulence et ressentent une insatisfaction corporelle plus importante que les personnes normo pondérées. Ceci a de lourdes conséquences sur leur vie quotidienne. Comment les personnes ex-obèses opérées de chirurgie de l’obésité vivent-elles avec un nouveau corps ? Q...

Organizational culture is averse to innovation. Some organizations are dedicated to creativity as a business (e.g. advertising, cinema or design): they nevertheless apply the classic production rules of labour division, specialism, incremental innovation and evaluation by demand. Creativity applied to organizations themselves, or to in-house proces...

Children and adults in developed countries on average consume too little water, which can lead to negative health consequences. In a one-year longitudinal field experiment in Poland, we compared the impact of three home-based interventions on helping children and their parents/carers to develop sustainable increased plain water consumption habits....

EBSP, Volume 27, No. 1, May 2015 – special issue in honour of Serge Moscovici - Editors: Jean-Claude Croizet, Manuela Barreto & Sibylle Classen This collection of tributes to Serge Moscovici is meant to complement other initiatives EASP is currently developing, by bringing together personal reflections on how Moscovici influenced the life and thou...

« Il y a des moments privilégiés où, jetant un regard rétrospectif sur sa vie, un homme découvre à quel point ce qui apparaît aux autres comme une carrière a été pour lui une longue suite d’improvisations et d’étonnements ». Ce sont les premières paroles prononcées par Serge Moscovici à Berne en 2003, lors de la réception du prestigieux prix Balzan...

Two methods of data collection (mailing and telephone interviews) were applied to the same open-ended question : “What is an ideal breakfast ?” on equivalent samples (N=1000). Lexicometric analysis and descending classification demonstrate important lexical, syntactic and semantic differences in the corpuses. Telephone answers are shorter, lexicall...

Pérez, J.A., Kalampalikis, N., Lahlou, S., Jodelet, D., & Apostolidis, T. (2015). In memoriam Serge Moscovici (1925-2014). European Bulletin of Social Psychology, 27(1), 3-14.

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The ‘Societal psychology’ approach, introduced by Himmelweit & Gaskell (1990) at the London School of Economics and Political Science, and developed by a number of scholars (Bar-Tal, 2000; Misra, 2006; Moscovici, 1972; Staerkle, 2011; Valentim, 2011), is the focus of this paper and the hallmark of our own research as a collective. All disciplines o...

How do societies reproduce? Berger and Luckmann (1966) popularized the idea of a continuous reconstruction of society; they showed the importance of education of individual members in this reproductive reconstruction. Societies are enacted and reproduced by human behaviour, through practice. Societies are not static; new objects are constructed, ne...

Subjective Evidence Based Ethnography (SEBE) is a method designed to access subjective experience. It uses First Person Perspective (FPP) digital recordings as a basis for analytic Replay Interviews (RIW) with the participants. This triggers their memory and enables a detailed step by step understanding of activity: goals, subgoals, determinants of...

In this paper we demonstrate that societal psychology makes a unique contribution to the study of change through its focus on the 'contextual politics' of change, examining the different interests at stake within any social context. Societal psychology explores the contexts which promote or inhibit social and societal change and can be seen as a br...

We use automated textual analysis to compare Ronald Reagan's rhetoric with that of presidents Woodrow Wilson through Barack Obama, using their State of the Union speeches. We are able to assign statistical significance to the thematic content, and to depict spatially the shifting dimensionality in themes used by presidents. We find strong evidence...

Le travail se numérise. S'appuyant sur l'évolution permanente des technologies de l'information et de la communication (TIC), les organisations contemporaines, privées ou publiques, marchandes ou non marchandes, doivent réorganiser leurs processus de fonctionnement. Cet ouvrage rassemble ainsi les méthodes et les théories, illustrées par des appli...

This article addresses a methodological gap in the study of creativity: the difficulty of capturing the microgenesis of creative action in ways that would reflect both its psychological and behavioral dynamics. It explores the use of subjective camera (subcam) by research participants as part of an adapted Subjective Evidence-Based Ethnography (SEB...

This paper addresses the methodological gap that impedes the collection of empirical data on subjective experience. It describes a new family of methods for social science research (Subjective Evidence-Based Ethnography: SEBE). The methods are based on: first-person audio-visual recording with a miniature video-camera worn at eye-level (‘subcam’);...

A representation is usually described as an organized set of cognitive elements. But what are these elements? We discuss here the nature the “elements” of representations, starting from a seminal paper by Codol. Section 1 summarizes Codol’s formalism to describe the content and structure of representations: representations are made of “cognemes”. S...

The Handbook of Human-Machine Interaction features 20 original chapters and a conclusion focusing on human-machine interaction (HMI) from analysis, design and evaluation perspectives. It offers a comprehensive range of principles, methods, techniques and tools to provide the reader with a clear knowledge of the current academic and industry practic...

Ce chapitre examine l’originalité de l’apport de la notion de représentation sociale : le double croisement entre individuel et social, d’une part, et matériel et idéel, d’autre part. Il met ensuite en lumière le principe actif de la construction sociale a l’œuvre dans la représentation sociale : une intelligence collective distribuée et décentrali...

Energy consumption is obviously a key issue for sustainability, primarily because it depletes non-renewable fossil fuels, produces carbon dioxide (CO2) and other pollution. As climate change is becoming a key political issue, and as oil prices rise, society has become acutely aware of this issue. Also, as a limited resource, energy can become a maj...

On étudie ici la manière dont les Representations sociales en mettent to practice en naturelle situation. Pour on cell représentation consider it composante comme une de l'activité. Cell deux pose questions. 1) quelle (s) représentation (s) le sujet va-t-il de son tirer Réservoir psychique en action pour situation (that sachant hébergeons Chacun no...

Expert knowledge in the professional world is difficult to capture because of its largely tacit nature (difficult to verbalize). We detail here a set of methods and techniques (dual digital video capture with subjective and external perspective; situated goal-oriented verbalization protocol; self-confrontation and reconstruction interviews) that he...

Expert knowledge in the professional world is difficult to capture because of its largely tacit nature (difficult to verbalize). We detail here a set of methods and techniques (dual digital video capture with subjective and external perspective; situated goal-oriented verbalization protocol; self-confrontation and reconstruction interviews) that he...

Transmission of human experience is essential for many purposes. It has two aspects: content and social relations. Digital technologies can solve some of the classic issues around the capture and transmission of human experience. Using these new technical affordances as a basis, this article presents a framework to capture and describe human activi...

Sleeping newborns display facial mimics which give the impression of negative or positive affects. Smiling and frowning are the simplest and easily recognized ones.Objective This study is an attempt to understand the neurophysiological meaning of these mimics and to define their connection with the functional role of REM sleep during ontogenesis.Pa...

This paper focuses on the relationship between experts and novices, grounded in research within Electricité De France (EDF), a large electricity industry company. We present a method for capturing the know-how embodied in professional gestures. The final goal is to support annotation, archival, enhancement, update, and transmission of know-how. Our...

The EU-funded project ‘Sustainable Consumption Research Exchanges’ (SCORE!) consists of around 200 experts in the field of sustainable innovation and sustainable consumption. The SCORE! philosophy is that innovation in SCP policy can be achieved only if experts that understand business development, (sustainable) solution design, consumer behaviour...