Species and Assessors
Thirteen species were chosen to represent a broad spectrum of taxonomic groups and life histories, including vascular plants, birds, invertebrates, mammals, a reptile and a fish. In several cases only an isolated portion of the species total range was considered in the assessment. These include Sp3: Keeled snail; Sp6: Grass tree; Sp7: Florida scrub-jay and Sp12: Desert tortoise. A total of 18 assessors took part in the experiment. Each assessor estimated the parameters for all of the species for each of the three classification protocols. All assessors were ecologists. Their expertise ranged from those who regularly use the classification protocols to assess species, to assessors who were experts with the individual species, and those who had a working knowledge of the protocols and could apply them to data sets. In all cases, the participants had sufficient knowledge that they could do the tasks credibly if they were employed by a government agency.