| Abstract: | Purpose:A systematic literature review was conducted to synthesize what is known about informationists, highlight program models, and suggest areas for future research.Methods:Articles retrieved through database searching were reviewed for relevance. Informationist case reports were identified and coded according to an attributes checklist. Data from other retained publications were synthesized under broad themes. The few research studies found were reviewed for level of evidence.Results:Of 113 papers reviewed, the study identified 7 classic and 8 emerging informationist programs. Two major models are apparent, clinical and research, with priorities differing according to program maturity. The literature synthesis also brought together current thinking about informationist qualifications; practice roles; setting characteristics; education and training; organizational, programmatic, and service provider success factors; and challenges and barriers. Program outcomes to date are reported, and future research topics suggested. Specific findings will assist informationist program planners.Conclusions:While the informationist concept remains in the early adopter stage, it appears that domain knowledge, continuous learning, and embedding (working in context) are essential to success. The need for librarians to transition to greater specialization and libraries to emphasize customized service was underscored. A research agenda focused on information management, dissemination, behaviors, and economics is proposed.Highlights- After years of emphasizing the generalist librarian, health sciences librarians must become more specialized, paralleling the health care environment in which they work.
- An embedded informationist is more likely to achieve credibility, acceptance, and sustainability than an impersonal information service provided at a distance.
- Subject expertise is essential for the informationist.
- Model informationist programs with the greatest stability are library funded.
- Because informationist programs are inherently targeted to small groups, multisite studies are necessary to achieve robust evaluation.
Implications- A library starting an informationist program should review existing models, identify local needs, set program objectives, and then select the most appropriate approaches for its users.
- Programmatic emphasis should be placed on both technical and service excellence.
- Organizational commitment is needed for knowledge integration into practice and for the informationists'' lifelong learning.
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