(Rosenberg, 1982;Dutton and Thomas, 1985). These problems, in turn, require adaptation of the technologies already in use.A close understanding of the process of adaptation is critical for several reasons. First, users' adaptations to technologies-in-use often help to shape funher development and research activities (von Hippel. 1988;Dutton and Thomas, 1985). Second, the operating efficiency ultimately achieved with a new technology depends heavily on users' modifications (Enos, 1958;Hollander, 1965;Dutton and Thomas. 1984). Third, modifications affect not just the technologyin-use, but also its physical and organizational context (Leonard-Banon, 1988 (1983) states that when organizations try to rush the introduction process, they fail to identify and correct problems that later hamper productive use of the technology. Thus, "too-rapid implementation of the innovation ... can lead to disastrous results" (Rogers, 1983:364). Similarly, Hughes (1971:152) maintains that "trying to force the pace" of adaptation is counterproductive, while Hage and Aiken (1970:106) suggest that "the longer the elite allow [the] period of tnal and error to continue, the greater the chances of the new program achieving its intended objectives." Finally, Imai (1986) (Kiesler and Sproull, 1982;Starbuck, 1989). Groups in organizations also develop tendencies toward routine behaviors. Over time, they become increasingly unlikely to recognize and respond to new kinds of problems (Kelley and Thibaut, 1954;Katz, 1982;Hackman, 1990). Even research teams have been shown to be reluctant to alter a given technical approach once it has been selected, and the longer the approach has been used, the greater their rigidity (Allen, 1966).At the individual level, research suggests that people's arousal, attention, and motivation to engage in effortful problem solving is not constant over time. Specifically, active problem solving and information processing appear to drop sharply as soon as tasks become familiar or manageable (Langer and Imber, 1979;Kruglanski and Freund, 1983). With increasing exposure, observers tend to "chunk" activities into larger units that convey less information than fine-grained observauons, although a sudden surprise can sometimes reverse the process (Newtson, 1973; Louis and Sutton, 1991). Familiarity also breeds rounnized response patterns; once activities are well entrenched, even superficial resemblance to a known stimulus is sufficient to tngger a familiar response (Luchins, 1942).One of the few scholars to have considered the implications of these behavioral tendencies for technological adaptation is Weick (1990). Following Winner (1986), Weick (1990:21) suggests that "the point at which technology is introduced [may be) the point at which it is most susceptible to influence." Weick argues that "beginnings are of special imponance ... because they constrain what is learned about the technology and how fast it is learned " (1990:21-22 We deliberately sought vanety in the settings studied, the technologies...