Knowledge Tree
consumer behavior
Also known as: customer behavior, consumer behaviors
from single model dimensionNo definition has been generated yet — showing the first model analysis as a summary.
Consumer behavior is fundamentally defined as the study of activities associated with individuals' or organizations' decisions to purchase, use, and dispose of products or services consumer behavior definition, encompassing how people buy and use goods and services buying and using goods. It is shaped by psychological processes like learning, perception, and motivation psychological processes factor, social influences from groups, status, and family social influences defined, and individual differences such as age, gender, occupation, education, and culture individual differences listed. Macroeconomic factors like weak sentiment prompting caution cautious behavior from sentiment, high inflation inflation erodes value, GDP trends GDP influences behavior, and unemployment rates unemployment insights also drive shifts, as noted by Heads of Strategy using such data macro data anticipation. Marketing and advertising leverage psychology to influence it psychology in marketing, with tactics like emotional appeals 30% more effective than facts per Bamberg & Möser (2007) emotional appeals effectiveness, color mastery color influences behavior, and scarcity cues highlighted by Dan Ariely (2008) psychological tactics. Research methods include market firms analyzing data market research firms, questionnaires questionnaire use, PLS-SEM per Rana et al. (2023) and Baber et al. (2024) PLS-SEM application, neuromarketing combining neuroscience and psychology neuromarketing definition, and qualitative interviews in Consumer Culture Theory qualitative insights. Studies like Chen et al. on energy consumption Chen et al. energy patterns, Nolan and O’Malley (2015) on unanticipated effects in Demand Response unanticipated behavior, Shapiro & Burchell (2021) on financial stress financial stress study, and Nielsen (2018) showing 66% desire sustainable products Nielsen sustainability illustrate applications. Behavioral economists critique rational models for ignoring context rational models fail, emphasizing emotions emotion driver. Consumer behavior research debates its status as marketing sub-discipline or independent field focused on well-being CBR debate.
Model Perspectives (3)
openrouter/x-ai/grok-4.1-fast definitive 95% confidence
Consumer behavior is fundamentally defined as the study of activities associated with individuals' or organizations' decisions to purchase, use, and dispose of products or services consumer behavior definition, encompassing how people buy and use goods and services buying and using goods. It is shaped by psychological processes like learning, perception, and motivation psychological processes factor, social influences from groups, status, and family social influences defined, and individual differences such as age, gender, occupation, education, and culture individual differences listed. Macroeconomic factors like weak sentiment prompting caution cautious behavior from sentiment, high inflation inflation erodes value, GDP trends GDP influences behavior, and unemployment rates unemployment insights also drive shifts, as noted by Heads of Strategy using such data macro data anticipation. Marketing and advertising leverage psychology to influence it psychology in marketing, with tactics like emotional appeals 30% more effective than facts per Bamberg & Möser (2007) emotional appeals effectiveness, color mastery color influences behavior, and scarcity cues highlighted by Dan Ariely (2008) psychological tactics. Research methods include market firms analyzing data market research firms, questionnaires questionnaire use, PLS-SEM per Rana et al. (2023) and Baber et al. (2024) PLS-SEM application, neuromarketing combining neuroscience and psychology neuromarketing definition, and qualitative interviews in Consumer Culture Theory qualitative insights. Studies like Chen et al. on energy consumption Chen et al. energy patterns, Nolan and O’Malley (2015) on unanticipated effects in Demand Response unanticipated behavior, Shapiro & Burchell (2021) on financial stress financial stress study, and Nielsen (2018) showing 66% desire sustainable products Nielsen sustainability illustrate applications. Behavioral economists critique rational models for ignoring context rational models fail, emphasizing emotions emotion driver. Consumer behavior research debates its status as marketing sub-discipline or independent field focused on well-being CBR debate.
openrouter/x-ai/grok-4.1-fast definitive 88% confidence
Consumer behavior encompasses the psychological, emotional, and behavioral factors influencing individuals' decisions to allocate resources like time and money toward consumption, analyzing what, why, when, and how often they purchase, as defined in psychological studies psych allocation study. It differs from customer behavior, which focuses on observable actions with specific brands behavior distinction. The process unfolds across five stages: need recognition, information search, evaluation of alternatives, choice, and post-purchase decision stages. Traditional metrics like cognitive effort and search behavior often capture intent rather than actual behavior, according to Liu et al. (2023), while replication challenges hinder full understanding, per Zhang et al. (2021). Neuromarketing addresses this by analyzing neural and behavioral responses across stages using tools like EEG, fMRI, and eye-tracking neuro techniques, with studies such as Alvino et al. (2020) EEG and Casado-Aranda et al. (2020) fMRI examining pre-, during-, and post-purchase phases. A systematic review by the authors claims to be the first assessing actual behavior via neurometric and non-neurometric tools across stages first systematic review. Influences include marketing's emotional conditioning marketing conditioning, social media shifts social media platforms, and psychological manipulation in advertising ad manipulation, though some neuromarketing oversimplifies by ignoring cultural factors neuromarketing oversimplification. Post-purchase insights reveal marketing effectiveness, per Lee et al. (2017).
openrouter/x-ai/grok-4.1-fast 88% confidence
Consumer behavior is extensively studied in marketing contexts, as detailed in the book 'Consumer Behaviour: Applications in Marketing' by East, Singh, Wright, and Vanhuele Consumer Behaviour book by East et al.. Traditional theories portray consumers as rational agents making intended decisions on branded products rational consumer theories by Mullen & Johnson, yet newer models emphasize unconscious mental processes unconscious processes model by Martin & Morich and self-control failures leading to impulsive purchasing impulse buying by Baumeister. Social media profoundly shapes it, with user-generated content as a key motivator UGC motivates consumer behavior, influencers driving impulse buys in tourism per Irene Garcia-Medina influencers on impulse buying, and studies in Kathmandu Valley by Puja Bista and Ramesh Rawat social media impact in Nepal. Digital marketing amplifies conditional stimuli digital marketing stimuli influence, prompting marketers to adapt channels marketers shift to digital, while emerging platforms require longitudinal tracking of sentiment and buying longitudinal social media studies. Ethical aspects arise in big data personalization big data ethics by Liu et al. and conditioning techniques, where executives stress transparency executives on ethical conditioning. Alternative paradigms include gift-giving as agapic love by Russell W. Belk and Gregory S. Coon gift-giving paradigm by Belk & Coon and hermeneutical approaches by John O'Shaughnessy hermeneutical consumer approach.
Facts (101)
Sources
Neuro-insights: a systematic review of neuromarketing perspectives ... frontiersin.org 20 facts
referenceSchiffman, Wisenblit, and Kumar (2011) authored the textbook 'Consumer Behavior', published by Pearson Education India.
referenceWang, Alsharif, Abd Aziz, Khraiwish, and Salleh (2024) performed a PRISMA-based analysis of EEG studies concerning consumer behavior.
referenceZamith et al. (2025) utilized GSR and eye tracking (ET) to study consumer behavior across pre-purchase, purchase, and post-purchase stages, with a focus on affective responses.
claimThe authors claim this review is the first to examine actual consumer behavior across decision-making stages using both neurometric and non-neurometric tools, rather than relying on proxy or intentional behavior.
claimThe inability to fully replicate decision-making processes during actual purchases hinders the understanding of consumer behavior, according to Zhang et al. (2021).
referenceChristophe Morin (2011) published 'Neuromarketing: the new science of consumer behavior' in the journal Society, which frames neuromarketing as a new scientific approach to understanding consumer behavior.
claimLee et al. (2017) and Zhang and Lee (2022) assert that the post-purchase stage of consumer behavior provides valuable insights into the effectiveness of marketing strategies and consumer satisfaction.
referenceCasado-Aranda et al. (2020) applied the Theory of consumer ethnocentrism using fMRI and questionnaires to analyze consumer behavior across pre-purchase, purchase, and post-purchase stages.
procedureThe study reviews how actual consumer behavior is assessed and measured across the five stages of consumer decision-making: (1) need recognition, (2) information search, (3) evaluation of alternatives, (4) choice, and (5) post-purchase.
claimNeuroscientific techniques such as EEG, fMRI, and eye-tracking can evaluate consumer behavior across decision-making stages, including need recognition, evaluation, and post-purchase, by measuring real-time neural responses.
referenceL. Alvino, R. van der Lubbe, R. A. Joosten, and E. Constantinides (2020) analyzed consumer behavior and brain activity during wine tasting experiences to determine consumer preferences.
referenceOliveira, Guerreiro, and Rita (2022) published 'Neuroscience research in consumer behavior: a review and future research agenda' in the International Journal of Consumer Studies, which reviews the state of neuroscience in consumer behavior research.
referenceCosta-Feito, González-Fernández, Rodríguez-Santos, and Cervantes-Blanco (2023) performed a science mapping approach to analyze the use of electroencephalography (EEG) in consumer behavior and marketing research.
referenceWinkielman, Berridge, Wilbarger (2005) found that unconscious affective reactions to masked happy versus angry faces influence consumption behavior and judgments of value.
referenceAlvino et al. (2020) utilized EEG and questionnaires to study consumer behavior across pre-purchase, purchase, and post-purchase stages.
referenceGómez-Carmona et al. (2021) utilized fMRI to study consumer behavior across pre-purchase, purchase, and post-purchase stages, with a focus on affective responses.
claimNeurometric tools and techniques offer an alternative to proxy variables by measuring actual consumer behavior at different buying stages.
claimResearchers have integrated theories from consumer behavior, psychology, economics, and sociology with consumer neuroscience to develop and test decision-making models.
claimMany neuromarketing studies oversimplify consumer behavior by focusing primarily on neural or emotional responses while neglecting complex factors such as cultural, social, and cognitive influences.
claimThe systematic review is the first to examine actual consumer behavior across decision-making stages using both neuro-metric and non-neuro-metric tools.
Redefining Consumer Desires: A Qualitative Study on Marketing's ... ibimapublishing.com Feb 11, 2025 10 facts
claimMullen & Johnson (2013) cite theories of consumer behavior asserting that consumers are rational agents making intended decisions about the branded products and services they purchase and use.
claimMarketing impacts consumer behavior by extending beyond immediate needs to include emotional and cognitive conditioning, as viewed through a conditional psychology lens.
claimMarketing Executive Group B prioritizes fulfilling existing consumer needs over creating new desires as a method to impact consumer behavior.
perspectiveExecutives acknowledge the effectiveness of conditioning techniques but emphasize the ethical responsibility of using these methods transparently, noting the fine line between conditioning and manipulating consumer behavior.
claimMarketing efforts influence consumer behavior through both rational and emotional appeals.
claimMarketing impacts consumer behavior by extending beyond immediate needs to include emotional and cognitive conditioning, as viewed through a conditional psychology lens.
referenceMartin, N., & Morich, K. (2011) published 'Unconscious mental processes in consumer choice: Toward a new model of consumer behavior' in the Journal of Brand Management, which proposes a model of consumer behavior based on unconscious mental processes.
claimMarketers have increased their use of digital marketing channels in response to the shift in consumer behavior toward digital and social media.
claimMullen & Johnson (2013) note that theories of consumer behavior often assert that consumers are rational agents making intended decisions about purchased products and services.
claimDigital marketing has increased the influence of conditional stimuli on consumer behavior, as noted by Lamberton & Stephen (2016) and Vinerean et al. (2013).
Marketing and Consumer Psychology - iResearchNet business-psychology.iresearchnet.com 7 facts
claimRetailers and brands utilize specific psychological tactics to influence consumer behavior, such as using warm lighting to increase in-store comfort or scarcity cues like 'only 3 left' to encourage online clicks, as noted by Dan Ariely (2008).
claimConsumer psychology utilizes color mastery, specifically using urgent red, loyal blue, and green ethics, to influence consumer behavior and turn visuals into sales tools.
accountA charity successfully raised $1 million by utilizing tear-jerking visuals, demonstrating the effectiveness of emotional triggers in consumer behavior.
measurementEmotional appeals, such as guilt over waste or pride in green living, are 30% more effective at influencing consumer behavior than facts alone, according to Bamberg & Möser (2007).
measurementAccording to a 2018 Nielsen study, 66% of consumers express a desire for sustainable products, reflecting broader ethical shifts in consumer behavior.
claimThe primacy effect, which posits that first impressions dominate memory and perception, is a recognized psychological phenomenon in consumer behavior (Ebbinghaus, 1913; Murdock, 1962).
referenceGeert Hofstede's cultural dimensions theory, which includes individualism, power distance, and uncertainty avoidance, frames how cultural influences affect consumer behavior (Hofstede, 2001).
7 Psychological Strategies to Influence Consumer Spending driveresearch.com Nov 19, 2020 6 facts
claimCompanies hire market research firms to collect and analyze consumer behavior data to understand customer identity, purchasing motivations, and decision-making processes.
claimSocial influences on consumer behavior are defined by an individual's social group, status, and familial ties.
claimIndividual differences in consumer behavior consist of personal factors including age, gender, occupation, educational level, and cultural background.
claimConsumer behavior is influenced by three main factors: psychological processes (learning, perception, and motivation), social influences (social group, status, and familial ties), and individual differences (age, gender, occupation, educational level, and cultural background).
claimThe psychological processes factor of consumer behavior focuses on a consumer's ability to process and retain information on a product or service, consisting of three components: learning, perception, and motivation.
claimConsumer behavior is the study of all activities linked to an individual or an organization's decision to make a purchase, use a product or service, and dispose of a product or service.
Understanding the Psychology of Impulse Buying in E-Commerce jmsr-online.com Aug 9, 2025 5 facts
perspectiveEncouraging educated, aware, and morally aligned consumer behavior is a recommended goal for the digital economy.
claimPeer influence on consumer behavior can manifest directly through social media recommendations or indirectly through aggregated user behavior.
referenceThe book 'Consumer Behaviour: Applications in Marketing' by East, Singh, Wright, and Vanhuele covers various aspects of consumer behavior in marketing contexts, published in 2016.
referenceBaumeister published 'Yielding to Temptation: Self‐Control Failure, Impulsive Purchasing, and Consumer Behavior' in the Journal of Consumer Research in March 2002.
referenceThe book 'Consumer Behaviour: Applications in Marketing' by Marc Vanhuele provides an overview of consumer behavior applications within marketing, published in 2021.
A comprehensive overview on demand side energy management ... link.springer.com Mar 13, 2023 5 facts
claimWhen implementing demand-side management (DSM), key factors to consider include appliance load profiles, renewable energy integration, load categorization, constraints, dynamic pricing, consumer categorization, optimization techniques, consumer behaviors, electricity data issues, knowledge availability, framework solidity, and smart grid technology with intelligent applications, according to Khan and Jayaweera (2019).
claimNolan and O’Malley (2015) emphasize that it is essential to recognize and manage the potential effects of unanticipated consumer behavior on Demand Response (DR) features throughout the evaluation process.
claimThe implementation of Demand Side Management (DSM) requires planning and managing decision parameters and operating constraints, which depend on factors such as appliance load profiles, renewable energy integration, load categorization, dynamic pricing, consumer categorization, optimization techniques, consumer behaviors, electricity data issues, and the use of grid-intelligent appliances.
claimImplementing demand-side management (DSM) requires consideration of factors including appliance load profiles, renewable energy integration, load categorization, constraints, dynamic pricing, consumer categorization, optimization techniques, consumer behaviors, electricity data issues, knowledge availability, framework solidity, and smart grid technology applications.
claimThe implementation of demand-side management (DSM) requires planning and managing decision parameters and operating constraints, which depend on factors such as appliance load profiles, renewable energy integration, load categorization, dynamic pricing, consumer categorization, optimization techniques, consumer behaviors, electricity data issues, knowledge availability, framework reliability, smart/grid-intelligent appliances, and control strategies.
Consumer Psychology: Insights and Practical Applications online.edhec.edu Aug 19, 2025 4 facts
claimAn advanced Master’s Degree in Marketing with a focus on consumer behavior prepares professionals to analyze psychological drivers and apply insights to real-world marketing challenges.
claimConsumer psychology professionals conduct psychological research on consumer motivations and behaviors.
claimConsumer Psychology Consultants help businesses understand consumer behavior and the decision-making process to develop effective marketing strategies using research and data analysis.
claimThe digital age has significantly impacted consumer behaviour, creating new trends and challenges for marketers.
Examine how psychological techniques are used to influence ... linkedin.com Aug 10, 2023 3 facts
claimAdvertising functions as a tool to communicate messages, promote products, and influence consumer behavior in the modern market.
claimMarketers build advertising strategies based on consumer behavior, which involves understanding how individuals think, feel, and make choices.
claimBrand personality is a concept in consumer behavior where brands are personified and associated with specific traits.
Managerial marketing and behavioral marketing: when myths about ... link.springer.com Feb 28, 2023 3 facts
claimThe extension of the Stimulus-Response (SR) model to include the Organism component has contributed to explaining consumer behavior and optimizing the use of marketing instruments in managerial marketing.
claimConsumer behavior research (CBR) has historically debated whether consumer behavior is a sub-discipline of marketing or an independent research direction dedicated to consumer well-being rather than serving industry needs.
claimMyths in the marketing discipline emerge due to the complexity and non-observability of certain phenomena, such as psychographic constructs used to explain consumer behavior.
The Psychology of Advertising - - Taproot Therapy Collective gettherapybirmingham.com Oct 14, 2024 3 facts
claimThe Taproot Therapy Collective asserts that modern advertising and public relations utilize psychological principles to influence consumer behavior, which the author characterizes as a form of psychological manipulation.
claimAdvertising uses archetypes to influence consumer behavior and shape desires.
claimModern advertising utilizes psychological manipulation to influence consumer behavior, requiring individuals to exert concerted effort to resist consumerism and maintain an authentic identity.
Consumer Behavior | Psychology Today psychologytoday.com 3 facts
claimResearch into consumer behavior encompasses psychological issues including communication, identity, social status, decision-making, and mental and physical health.
claimConsumer behavior is defined as the study of how people buy and use goods and services.
claimSome organizations influence consumer behavior by manipulating fears, unhealthy habits, or negative tendencies.
Critical account of ideology in consumer culture - Academia.edu academia.edu 3 facts
referenceMelea Press and Eric J. Arnould authored the article 'How Does Organizational Identification Form? A Consumer Behavior Perspective', published in the Journal of Consumer Research in 2011, volume 38, issue 4, pages 650-666.
claimJohn O'Shaughnessy proposed an hermeneutical approach to understanding consumer behavior in his 1985 paper 'A Return to Reason in Consumer Behavior: An Hermeneutical Approach'.
claimQualitative interviews conducted in the research provided insights into women's perceptions of feminism and sexuality, illustrating how ideological interpretations influence consumer behavior and identity within Consumer Culture Theory.
Macro Indicators for Investment Research Memo | FMP site.financialmodelingprep.com Aug 6, 2025 3 facts
claimGDP trends reflect economic expansion or contraction, which influences corporate earnings, consumer behavior, credit cycles, and investor sentiment.
claimHeads of Strategy utilize macroeconomic data to anticipate shifts in consumer behavior, cost structures, or global demand that could impact long-term corporate positioning.
claimThe unemployment rate serves as a measure of labor market strength and provides insight into consumer behavior, wage dynamics, and economic resilience.
Scrolling Into Choice: The Psychology and Practice of Social Media ... acr-journal.com Oct 24, 2025 3 facts
referenceKikelomo Fadilat Anjorin, Mustafa Ayobami Raji, and Hameedat Bukola Olodo published a comprehensive review in 2024 titled 'The influence of social media marketing on consumer behavior in the retail industry' in the International Journal of Management & Entrepreneurship Research.
referencePuja Bista and Ramesh Rawat (2024) studied the impact of social media on consumer behavior specifically within the Kathmandu Valley, as published in the Nepalese Journal of Management.
referenceMd. Shelim Miah (2024) examined the role of emerging technologies and ethical considerations in navigating consumer behavior in the digital age, published in the Asian Journal of Economics Business and Accounting.
Behavioral economics: what it is and three ways marketers can use it quirks.com 3 facts
claimRational economic theory, which is founded on the principle of maximizing expected utility, fails to predict consumer behavior in certain scenarios because it does not account for the realistic context of decision-making, including environmental and psychological factors.
claimEmotion is a primary driver of behavioral economics phenomena, such as the consumer behavior observed when Hershey's Kisses are offered for free.
perspectiveBehavioral economists argue that rational economic models fail to predict consumer behavior because they do not account for the realistic context of decision-making, specifically environmental and psychological factors.
The psychological mechanisms through which digital content ... frontiersin.org Nov 12, 2025 3 facts
referenceKothari, Choudhary, Jain, Singh, Prasad, and Vani (2025) analyze the impact of social media advertising on consumer behavior, focusing on the roles of credibility, perceived authenticity, and sustainability.
claimRaju, Veluri, and Venugopal (2024) examined changes in consumer behavior resulting from urbanization, specifically the transition from rural to urban environments.
claimRaju et al. (2024) examined how urbanization drives changes in consumer behavior as populations transition from rural to urban environments.
Factors Affecting Impulse Buying Behavior of Consumers - Frontiers frontiersin.org 2 facts
claimThe uncertainty caused by the COVID-19 pandemic and the resulting economic crisis shifted consumer behavior toward more planned and informed consumption.
claimThe research article 'Factors Affecting Impulse Buying Behavior of Consumers' identifies consumer behavior, purchase intention, impulse purchase, emotional influences, and marketing strategies as its primary keywords.
Psychological triggers in online shopping: The influence of scarcity ... academia.edu 2 facts
referenceB. Liu, L. Zhang, and W. Zhan (2022) analyzed the ethical use of big data in digital marketing, specifically focusing on the relationship between personalization and consumer behavior.
referenceD. Muenster, J. Thomas, and P. Williams (2022) researched the psychological impact of flash sales, focusing on how urgency influences consumer behavior.
The Emotional Wallet: A Behavioral Analysis of Consumer Financial ... acr-journal.com Nov 10, 2025 1 fact
referenceShapiro, G. K., & Burchell, B. J. (2021) authored 'Financial stress and consumer behavior: Evidence from large-scale surveys' in the Journal of Behavioral Finance, 22(2), 123–138.
7 Easy Marketing Psychology Tactics that Work (+26 Examples) wordstream.com Apr 19, 2024 1 fact
claimMarketers can influence consumer behavior by conveying that a higher level of performance or a better version of the consumer is attainable, which encourages consumers to act in ways that align with those beliefs.
Read This Story to Learn How Behavioral Economics Can Improve ... ama.org Dec 1, 2018 1 fact
claimThe most important aspect of how nudging and behavioral economics are used in marketing and advertising is the shift in research tactics to focus on consumer behavior rather than intent, enabled by real-time data.
Advancing energy efficiency: innovative technologies and strategic ... oaepublish.com 1 fact
referenceChen et al. found that household energy consumption patterns are influenced by consumer behavior, socio-economic status, cultural practices, and awareness of energy efficiency.
Thinking vs Feeling: The Psychology of Advertising | USC MAPP ... appliedpsychologydegree.usc.edu Nov 17, 2023 1 fact
claimEstablishing a strong, recognizable brand influences consumer perception, consumer behavior, and purchase intent, according to the Open Journal of Social Sciences.
The Power of Scarcity and Urgency: Behavioral Economics in ... marketingcourse.org Apr 28, 2025 1 fact
claimResearch on behavioral economics principles often employs experimental designs, such as laboratory settings or online experiments, to isolate the impact of specific psychological triggers on consumer behavior.
Understanding the Psychology of Advertising | The Chicago School thechicagoschool.edu 1 fact
claimPsychology is applied in marketing and advertising fields to influence consumer behavior and improve sales, despite the methods of delivery evolving from ancient marketplaces to digital social media platforms.
The Cognitive Manipulation of Advertisement standrewseconomist.com Nov 17, 2025 1 fact
claimConsumer behavior is defined as the process of making purchase decisions based on available resources, including effort, money, and time.
Examining Behavioural Aspects of Financial Decision Making - OUCI ouci.dntb.gov.ua 1 fact
referenceLim K. L., Soutar G. N., and Lee J. A. examined factors affecting investment intentions from a consumer behavior perspective in a 2016 publication.
Impact of Economic Indicators on Investment Decisions - BI-SAM bi-sam.com Sep 9, 2025 1 fact
claimWeak consumer sentiment leads to cautious consumer behavior and defensive positioning.
An annotated analytic review of biosynthetic polymers and circular ... link.springer.com Mar 7, 2026 1 fact
claimMarket determinants for new eco-textiles include environmental regulations, the scale economy achieved, and customer behavior regarding price premiums.
Key Macroeconomic Factors and their Impact on the Economy imarticus.org Oct 13, 2024 1 fact
claimHigh inflation rates erode the value of money, which impacts consumer behavior and corporate strategies.
The psychology behind ads that make people buy | Zappi zappi.io Jan 8, 2026 1 fact
claimEffective advertising influences consumer behavior by utilizing psychological mechanisms such as cultivating prospective-shifting emotions and employing social proof to guide perceptions and actions.