Carr, Wilkinson, Blackman, & McIlvane, 2000

Printer-friendly version
APA Citation: 

Carr, D., Wilkinson, K. M., Blackman, D., & McIlvane, W. J. (2000). Equivalence classes in individuals with minimal verbal repertoires. Journal of the Experimental Analysis of Behavior, 74, 101-115.

Publication Topic: 
RFT: Empirical
Publication Type: 
Article
Language: 
English
Keyword(s): 
conditional discrimination, stimulus equivalence, verbal behavior, touchscreen press, humans
Abstract: 

Studies from two different laboratories tested for equivalence classes in individuals with severe mental retardation and minimal verbal repertoires. In the first study, 3 individuals learned several matching-to-sample performances: matching picture comparison stimuli to dictated-word sample stimuli (AB), matching those same pictures to printed letter samples (CB), and also matching the pictures to nonrepresentative forms (DB). On subsequent tests, all individuals immediately displayed Emergent Relations AC, AD, BC, BD, CD, and DC, together constituting a positive demonstration of equivalence (as defined by Sidman). The second study obtained a positive equivalence test outcome in 1 of 2 individuals with similarly minimal verbal repertoires. Taken together, these studies call into question previous assertions that equivalence classes are demonstrable only in individuals with welldeveloped language repertoires.

This page contains attachments restricted to ACBS members. Please join or login with your ACBS account.