Table 3.

Learning processes.

Test	Training
	1 Stimulus	2 Stimuli
Familiar	1 Excitation	2 - Excitation determines S+ responding - The balance of Excitation (CS+) and Inhibition (CS−), related by their distance along sensory dimensions, determines S- responding
Novel	3 Excitation related by distance along sensory dimensions from CS+	4 The balance of Excitation (CS+) and Inhibition (CS−) related by novel stimulus distance from the two trained stimuli
2 Stimuli	−	5 Concurrent training leads to rule-based comparisons of simultaneous tested stimuli; rule application may be stronger than particular excitation to CS+

Hypothesized mechanics for learning that may underlie observed performance outcomes. The non-bolded terms in the central boxes are suggested names for the processes underlying observed performance outcomes in Table 2 that may help to explain the outcomes observed.