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The assessment center is not a place as its name seems to suggest, nor is it a single process or method. Rather, an assessment center employs multiple assessment methods and exercises to evaluate a wide range of competencies used to make a variety of employment decisions (e.g., employee selection, career development, promotion). Assessment centers can be used to assess small groups of people at relatively the same time. Many assessment center exercises resemble work sample tests designed to simulate the actual challenges found on the job.
Assessment center exercises can be used to measure many different types of job related competencies, including interpersonal skills, oral and written communication, planning and evaluating, and reasoning and problem solving abilities. A frequently used assessment center exercise is the in-basket test. A typical in-basket test is designed to simulate administrative tasks. During this exercise, applicants are asked to play the role of a person new to the job and are instructed to read and react to a pile of memos, messages, reports, and articles.
Some assessment center exercises can be used to evaluate groups and individual behaviors in group situations. For example, in a leaderless group discussion, a group of applicants is tasked with solving a problem or a series of problems in a limited amount of time. Other assessment center exercises include, but are not limited to, job knowledge tests, personality tests, and structured interviews. Applicant performance is usually observed and evaluated by multiple assessors (i.e., raters). When used for internal promotion purposes, assessment centers are frequently designed to reflect values and practices specific to an organization, but when used to assess external applicants, assessment centers should be designed to focus on the job and level of the job (e.g., manager) rather than practices unique to the organization. While assessment centers can be designed for various types of jobs, they are particularly effective for assessing higher-level managerial and leadership competencies. Assessment centers require extensive experience to develop, considerable logistical planning to set up, and numerous personnel to administer. Highly trained assessors are needed to observe and evaluate applicant performance on the group and individual exercises.
(See Section VI for a summary of each article)
Arthur, W. Jr., Day, E. A., McNelly, T. L., & Edens, P. S. (2003). A meta-analysis of the criterion-related validity of assessment center dimensions. Personnel Psychology, 56, 125-154.
Caldwell, C., Thornton, G. C., & Gruys, M. (2003). Ten classic assessment center errors: Challenges to selection validity. Public Personnel Management, 32(1), 73-88.
Gaugler, B. B., Rosenthal, D. B., Thornton, G. C., & Bentson, C. (1987). Meta-analysis of assessment center validity. Journal of Applied Psychology, 72(3), 493-511.
Testing and Assessment: An Employer's Guide to Good Practices. (2000). Washington, DC: U.S. Department of Labor, Employment and Training Administration. Note: Article can be accessed at http://www.onetcenter.org/guides.html.
Woehr, D., & Winfred, A. (2003). The construct-related validity of assessment center ratings: A review and meta-analysis of the role of methodological factors. Journal of Management, 29(2), 231-258.
Zedeck, S. (1986). A process analysis of the assessment center method. In B. M. Staw & L. L. Cummings (Eds.), Research in organizational behavior, 8, 259-296.
The Society for Industrial and Organizational Psychology (SIOP) website contains information on Assessment Centers.
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