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Bratman Routledge Lecture - Shared Intentional Activity (SIA) - Conceptual Foundations","","Lecture slides by Michael E. Bratman develop a philosophical account of shared intentional activity (SIA). The material distinguishes SIAs from mere strategic interaction and explicit promises, emphasizing both instrumental and non-instrumental importance for everyday life. It frames SIAs as central for theories of thinking and acting together, then motivates an account of small-scale SIA under conditions lacking asymmetric authority. Competing ideas from Searle and Gilbert are contrasted with an alternative approach grounded in individual planning agency, yielding a reductive yet multi-faceted model that supports continuities across conceptual, metaphysical, and normative levels.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/michael-e-bratman-routledge-lecture-shared-intentional-activity-sia-conceptual-foundations/638725/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/michael-e-bratman-routledge-lecture-shared-intentional-activity-sia-conceptual-foundations/638725.png","ImageObject",300,407,{"name":92,"@type":93},"Maya Linwood","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-22",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does shared intentional activity (SIA) mean in the lecture?","Question",{"text":112,"@type":113},"SIA is the capacity for shared intentional (and shared cooperative) activity, where people act together with a shared intention.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does SIA differ from mere strategic interaction and explicit promises?",{"text":117,"@type":113},"The lecture contrasts SIA with mere walking alongside each other (strategic interaction) and with explicit promises, which can involve cases like Hume’s rowers without reciprocal promises.",{"name":119,"@type":110,"acceptedAnswer":120},"What is the lecture’s alternative approach to explaining shared agency?",{"text":121,"@type":113},"It begins with a rich theory of individual planning agency and builds a multi-faceted model of shared agency using resources within that individual-planning framework to provide sufficient conditions for shared agency.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},638725,1792697666,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":144},962084928432,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","Michael E. Bratman Routledge Lecture June 2014  \n1  \n3  \nShared intentional activity (SIA)  \n􀂀 We have the capacity for shared intentional (and shared cooperative) activity.  \n􀂀 Examples: we paint the house together, dance together, have a conversation together, perform an experiment together, put on a play together, walk together  \n(Gilbert) .  \n4  \nSignificance of these phenomena  \n􀂀 Such SIAs are important in our lives, both instrumentally and noninstrumentally.  \n􀂀 Of concern in relevant special domains (law, political theory, cognitive psychology, business ethics …)  \n􀂀 A theory of human thought and human action needs to be, in part, a theory of thinking and acting together.  \n5  \nIn contrast to SIA  \n1. Mere strategic interaction (e.g., just walking alongside each other) .  \n2. Explicit promises (Hume’s rowers row together “tho’ they have never given promises to each other.”)  \n6  \nSmall scale SIA  \nInitial aim: articulate ideas useful in understanding small-scale SIA, in the absence of asymmetric authority. Duets and quartets rather than orchestras with conductors.  \n7  \nA fundamentally new capacity (and associated concept)?  \n􀂀 John Searle: new attitude of “we-intention”(vs. ordinary intentions involved in individual agency) in the minds of participating individuals.  \n􀂀 Margaret Gilbert: new inter-relation of “joint commitment” (involves special mutual obligations) between the participants.  \n􀂀 Such approaches are non-reductive and single-faceted.  \n8  \nMy alternative approach  \n􀂀 Begin with a rich theory of individual planning agency.  \n􀂀 Aim for a multi-faceted model of our shared agency, one that is grounded in structures of individual planning agency.  \n9  \nA reductive, multi-faceted model  \n􀂀 Use the theoretical resources available within the theory of individual planning agency to“construct”/provide sufficient conditions for shared agency.  \n􀂀 Thereby support continuities between individual planning agency and shared agency: conceptual, metaphysical, normative.  \n10","cbCainPVvwYjqFtx","https://ap.wps.com/l/cbCainPVvwYjqFtx","pdf",728609,42,"English","# Shared intentional activity (SIA)\n## Examples of SIAs\n# Significance of these phenomena\n## Importance for life and special domains\n# In contrast to SIA\n## Mere strategic interaction\n## Explicit promises\n# Small scale SIA\n## Initial aim and background condition\n# A fundamentally new capacity (and associated concept)?\n## Searle’s we-intention\n## Gilbert’s joint commitment\n# My alternative approach\n## Grounding shared agency in individual planning","[{\"question\":\"What does shared intentional activity (SIA) mean in the lecture?\",\"answer\":\"SIA is the capacity for shared intentional (and shared cooperative) activity, where people act together with a shared intention.\"},{\"question\":\"How does SIA differ from mere strategic interaction and explicit promises?\",\"answer\":\"The lecture contrasts SIA with mere walking alongside each other (strategic interaction) and with explicit promises, which can involve cases like Hume’s rowers without reciprocal promises.\"},{\"question\":\"What is the lecture’s alternative approach to explaining shared agency?\",\"answer\":\"It begins with a rich theory of individual planning agency and builds a multi-faceted model of shared agency using resources within that individual-planning framework to provide sufficient conditions for shared agency.\"}]","Michael E. Bratman Routledge Lecture - Shared Intentional Activity (SIA) - Conceptual Foundations | PDF",106]