The compounds were A1B1, A2B2, B1C1, and B2C2 ("correct compounds") and A2B1, A1B2, B2C1, and B1C2 ("incorrect compounds"; see Table 5).
0 (0/12) Table 5 Stimuli Presented in Each of the Phases in Experiment 2 TRAINING Phase 1 Simple successive discrimination training (differential responses) A1 [right arrow] R1 A2 [right arrow] R2 B1 [right arrow] R1 A2 [right arrow] R2 C1 [right arrow] R1 A2 [right arrow] R2 TEST Phase 4 AB/BC emergent relations test Correct Incorrect A1B1 A1B2 A2B2 A2B1 B1C1 B1C2 B2C2 B2C1 TRAINING Phase 2 Simple successive discrimination training (new differential responses) A1 [right arrow] R3 A2 [right arrow] R4 -- -- -- -- Phase 5 BA/CB emergent relations test Correct Incorrect B1A1 B1A2 B2A2 B2A1 C1B1 C1B2 C2B2 C2B1 TEST Phase 3 Transfer-of-fimction test -- -- Bl [left arrow] R3 ?
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The following conditional discriminations were trained: A1B1, A2B2, A3B3, B1C1, B2C2
, and B3C3.
Table 1 Compound Stimuli Presented in Each Experimental Phase Phase Phase 1: Baseline Training Phase 2: Symmetry Tests OTM MTO OTM MTO Related Not Related Not Related Not Related Not Related Related Related Related A1B1 A1B2 A1C1 A1C2 B1A1 B2A1 C1A1 C1A2 A2B2 A2B1 A2C2 A2C1 B2A2 B1A2 C2A2 C2A1 A1C1 A1C2 B1C1 B1C2 C1A1 C2A1 C1B1 C1B2 A2C2 A2C1 B2C2
B2C1 C2A2 C1A2 C2B2 C2B1 Phase 3: Equivalence Tests Related Related Not Related Not OTM MTO Related Related A1B1 B1C1 B1C2 A1B1 A1B2 A2B2 B2C2
B2C1 A2B2 A2B1 A1C1 C1B1 C1B2 B1A1 B1A2 A2C2 C2B2 C2B1 B2A2 B2A1
Therefore, the compound stimuli A1B1, B1C1, A2B2, B2C2
and the yes response can be integrated in a class, and the compound stimuli A1B2, B1C2, A2B1, B2C1 and the no response can be integrated in another class.
A1B1 as the sample, B2C2
as a comparison based on the trained equivalence relations, and A1B1 as a comparison based on the criterion of physical similarity between stimuli).
This was followed by the 4-s delay condition, in which the BA training and BC training required the successive correct completion of seven randomly intermixed trials of each type (B1A1, B2A2, B3A3, B1C1, B2C2
, and B3C3) before testing.
If the BC-BC and Q-BC performances resulted from matching on the basis of same discriminative functions, the subjects should respond exclusively to B1C1, B2C2
, and B3C3.
The children then showed novel conditional relations B1C1 and B2C2
The minimal conditional discrimination training necessary for the testing of stimulus equivalence may include the following tasks in addition to the A1B1 training described above: A2B2 training, B1C1 (selection of comparison C1, not C2, is dependent on sample stimulus B1) and B2C2
Phase A1was identical to Phase 3 of Experiment 2 except that blocks of the three BC compounds B2C3, B3C3, and B2C2
were substituted for the third block of A stimuli and the compounds B1C3, B2C3, and B2Cl were substituted for the seventh block of A stimuli.