Graphics for three-term contingencies.

Pisacreta (1982) drew a triangle instead of the usual straight arrow.

The triangle shows the three-term contingency: antecedent, behavior, consequence.

The goal was to stop readers from mixing up operant learning with old S-R psychology.

The paper is a call to action, not an experiment.

It says a triangle picture keeps the ABC parts in one clear unit.

That shape reminds students that the consequence feeds back to the antecedent.

Lyons (1995) took the same visual idea and stretched it into full contingency diagrams.

These bigger diagrams let you map many links, not just one ABC set.

Moss et al. (2009) also talk about contingencies, but they care about spotting them in messy data, not about how to draw them.

So the 1982 triangle is still the simplest way to start before you move to the bigger maps.

Next time you teach or supervise, sketch a quick triangle on the whiteboard.

Students see the loop at a glance and stop thinking stimulus causes response, end of story.

One small shape saves you ten minutes of talk and a pile of confusion.