Abstract：
:Three mentally retarded humans first acquired a simple discrimination: Simultaneously displayed visual stimuli A1 and A2 functioned as S+ and S-, respectively. The subjects also acquired a conditional discrimination, learning to select visual stimuli B1 and B2 conditionally upon A1 and A2, respectively. Then, B1 and B2 were displayed without A1 or A2. Subjects selected B1, an emergent discrimination that showed that B1 and B2 had become functionally equivalent to A1 and A2, respectively. Two subjects next learned to select C1 and C2 conditionally upon B1 and B2, respectively. They also learned to select B1 and B2 conditionally upon D1 and D2, respectively. Subsequent simple discrimination probe trials displayed (a) C1 and C2 and (b) D1 and D2. On the former, the subjects nearly always selected C1. On the latter, they initially selected D1 and D2 about equally often. Thus, the emergence of simple discrimination appears to depend on a specific experimental history.
journal_name
Behav Processesjournal_title
Behavioural processesauthors
de Rose JC,McIlvane WJ,Dube WV,Stoddard LTdoi
10.1016/0376-6357(88)90033-2subject
Has Abstractpub_date
1988-08-01 00:00:00pages
167-75issue
2eissn
0376-6357issn
1872-8308pii
0376-6357(88)90033-2journal_volume
17pub_type
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