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- Title
TYPICALITY EFFECTS IN CONTINGENCY-SHAPED GENERALIZED EQUIVALENCE CLASSES.
- Authors
Galizio, Mark; Stewart, Katherine L.; Pilgrim, Carol
- Abstract
Two experiments were conducted using match-to-sample methodologies in an effort to model lexical classes, which include both arbitrary and perceptual relations between class members. Training in both experiments used a one-to-many mapping procedure with nonsense syllables as samples and eight sets of abstract stimuli as comparisons. These abstract stimuli differed along a number of dimensions, four of which were critical m the experimenter-defined class membership. Stimuli in some comparison sets included only one of the class-defining features, but stimuli in other sets included two, three, or all lout of the critical features. Alter mastery of the baseline training, three types of probe tests were conducted: symmetry, transitivity/equivalence, and novel probe tests ill which the training nonsense syllables served as samples, and comparisons were novel abstract stimuli that included one or more of the class-defining features. Symmetry and transitivity/equivalence probe tests showed that the stimuli used in training became members of equivalence classes. The novel stimuli also became class members oil the basis of inclusion of any of the critical features. Thus these probe tests revealed the formation of open-ended generalized equivalence classes, hi addition, typicality effects were observed such that comparison sets with more critical features were learned with fewer errors, responded to more rapidly, and judged to be better exemplars of the class. Contingency-shaped stimulus classes established through a match-to-sample procedure dins show several important behavioral similarities to natural lexical categories.
- Subjects
PERCEPTUAL control theory; LEXICAL-functional grammar; BRAIN mapping; SYLLABICATION; BRAIN stimulation; PERCEPTUAL-motor processes; BEHAVIORAL assessment
- Publication
Journal of the Experimental Analysis of Behavior, 2004, Vol 82, Issue 3, p253
- ISSN
0022-5002
- Publication type
Article
- DOI
10.1901/jeab.2004.82-253