Abstract

The idea that similar selective processes operate in gene-based evolution, immunology, and operant psychology provides an intuitively appealing metaphor. This idea also isolates questions that operant psychologists should ask and makes some empirical predictions. However, the idea currently lacks the detail needed to precisely separate it from some plausible alternatives. This sort of thinking is the kind that operant psychologists should do if operant theorizing is to survive the competition among ideas.