Reports on a project which developed a measure of levels of difficulty of reference questions handled by the California Interlibrary Reference Referral Network, and identified indicative measures that would reliably stand for the concept of difficulty. Correlations of predictive difficulty and actual difficulty are discussed. (nine references)…

Reports on an evaluation of the higher levels of California's statewide reference referral network that involved an unobtrusive method utilizing existing records of actual reference transactions evaluated by panel of judges. Reference evaluation methods, findings of other studies, and other uses of the method are discussed. (Nineteen references…