Kamin (1969) “Predicability, surprise, attention and conditioning” [bottom p 15 of handout, see Gleitman, 1999, page 143-4, or Gleitman, 2004, p. 146; Lieberman, 2000, pp.121-124]

An experiment on “blocking”

Conditioned stimuli could be:

L = a light
N = a noise

or both together (L+N)

Group 1st stage (no of sessions) 2nd stage of training TEST Result: Effect of L alone
A L+N (8) N(16) L 50%
B N (16) L+N (8) L 10%
C   L+N (8) L 90%
D   N (24) L 8%


Back to - Phenomena showing that stimulus-pairing (contiguity) is not the only factor in Pavlovian conditioning. [bottom of page 17]