An expert system for abilities-oriented job analysis

Two methods were used to estimate the amount of 11 abilities required to perform the job of mental retardation technician. One of the methods was a subset of the ability rating scales developed by Fleishman (e.g., Fleishman & Quaintance, 1984). The second method was an expert system computer program based on the content of the ability rating scales. The results were examined for the extent to which the two methods produced similar findings. Respondents also rated the methods for personal preference, ease of understanding, and the extent to which one method was perceived to give a better picture of their job. Finally, the amount of time needed to complete each method was recorded. Convergent validity coefficients for the 11 abilities ratings from the two methods ranged from .08 to .57. Discriminate validity coefficients averaged .41 for the ability rating scales and .16 for the expert system. The preference rating indicated that most incumbents preferred the expert system method. The mean time to complete each method differed only slightly.