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To understand general issues in availability management, we carried out a naturalistic study of how interruptions are handled in face-to-face situations. We found that availability management requires negotiation, that it is also highly dependent on awareness about the availability of others, and that it demands cognitive effort to shift attention to the interruption. On the basis of these observations, we developed a technology, named. The Negotiator, that embodies three main design requirements: (a) support for negotiation, (b) contextual information about when a recipient is available for a call, (c) lightweightness to reduce attention overhead. We carried out an experimental study of interruption management using this technology. The interface satisfied the original design requirements, that is, people, were able to use it effectively to negotiate times to talk, while successfully carrying out an intellectually demanding activity. Contrary to our expectations, however, people preferred to take responsibility for returning calls rather than delegating them, and they preferred to schedule calls as soon as possible rather than deferring them. We suggest that there are social reasons why people do this. They feel a social obligation to return calls as soon as possible so as not to inconvenience others and also to be responsible for making these calls themselves. They also take calls sooner to avoid having to remember future conversational commitments. We discuss the theoretical and technical implications of these findings.<\/jats:p>","DOI":"10.1145\/1121112.1121114","type":"journal-article","created":{"date-parts":[[2006,5,8]],"date-time":"2006-05-08T16:09:20Z","timestamp":1147104560000},"page":"356-387","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":50,"title":["Managing availability"],"prefix":"10.1145","volume":"12","author":[{"given":"Mikael","family":"Wiberg","sequence":"first","affiliation":[{"name":"Ume\u00e5 University, Ume\u00e5, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Steve","family":"Whittaker","sequence":"additional","affiliation":[{"name":"Sheffield University, Sheffield, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2005,12]]},"reference":[{"key":"e_1_2_1_1_1","volume-title":"Procedings of ACM Conference on Computer Supported Cooperative Work","author":"Bellotti V."},{"key":"e_1_2_1_2_1","volume-title":"ACM Conference on Human Factors in Computing Systems (CHI'03)","author":"Bellotti V."},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/151233.151235"},{"key":"e_1_2_1_4_1","doi-asserted-by":"crossref","first-page":"623","DOI":"10.1016\/S0953-5438(00)00027-8","article-title":"Why don't telephones have off switches? 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