In the Research of Jenkins and Harrison,one Group of Pigeons

Multiple Choice

In the research of Jenkins and Harrison,one group of pigeons received presence-absence training--a 1000 Hz tone was an S⁺ and the absence of a tone was an S-.In a generalization test along the dimension of tone frequency,this group produced

A) typical generalization gradients with peaks at 1000 Hz
B) extremely narrow generalization gradients
C) flat generalization gradients
D) no generalization to other tones