Table 1.
Concepts presented to participants. Concepts 1 and 5–9 are the Shepard, Hovland, and Jenkins family consisting of three features and four positive examples.
Concept
SHJ-I3[4] red
AND red ∧ small
OR red ∨ small
XOR red ⊕ small
SHJ-II3[4] (red ∧ small) ∨ (green ∧ large)
SHJ-III3[4] (green ∧ large ∧ triangle) ∨ (green ∧ large ∧ square) ∨ (green ∧ small ∧ triangle) ∨ (red ∧ large ∧ square)
SHJ-IV3[4] (green ∧ large ∧ triangle) ∨ (green ∧ large ∧ square) ∨ (green ∧ small ∧ triangle) ∨ (red ∧ large ∧ triangle)
SHJ-V3[4] (green ∧ large ∧ triangle) ∨ (green ∧ large ∧ square) ∨ (green ∧ small ∧ triangle) ∨ (red ∧ small ∧ square)
SHJ-VI3[4] (green ∧ large ∧ triangle) ∨ (green ∧ small ∧ square) ∨ (red ∧ large ∧ square) ∨ (red ∧ small ∧ triangle)
10 XOR XOR red ⊕ small ⊕ square
Concept
SHJ-I3[4] red
AND red ∧ small
OR red ∨ small
XOR red ⊕ small
SHJ-II3[4] (red ∧ small) ∨ (green ∧ large)
SHJ-III3[4] (green ∧ large ∧ triangle) ∨ (green ∧ large ∧ square) ∨ (green ∧ small ∧ triangle) ∨ (red ∧ large ∧ square)
SHJ-IV3[4] (green ∧ large ∧ triangle) ∨ (green ∧ large ∧ square) ∨ (green ∧ small ∧ triangle) ∨ (red ∧ large ∧ triangle)
SHJ-V3[4] (green ∧ large ∧ triangle) ∨ (green ∧ large ∧ square) ∨ (green ∧ small ∧ triangle) ∨ (red ∧ small ∧ square)
SHJ-VI3[4] (green ∧ large ∧ triangle) ∨ (green ∧ small ∧ square) ∨ (red ∧ large ∧ square) ∨ (red ∧ small ∧ triangle)
10 XOR XOR red ⊕ small ⊕ square
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