"what is 17 × 24?"
sample 4 answers
① score each answer
o₁
408 ✓
score
1.0
o₂
391 ✗
score
0.0
o₃
408 ✓
score
1.0
o₄
~400 ≈
score
0.5
average the scores
② group average
(1.0 + 0.0 + 1.0 + 0.5) ÷ 4 =
0.625
advantage = score − average
③ who was above or below average?
1.0 − 0.625
+0.38
reinforce ↑
0.0 − 0.625
−0.63
suppress ↓
1.0 − 0.625
+0.38
reinforce ↑
0.5 − 0.625
−0.13
suppress ↓
update weights: more of o₁, o₃ · less of o₂, o₄
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