RFT App

Relational frame

The opposition frame

Relating stimuli as opposites along a shared dimension.

What it looks like

Opposition carries more information than distinction because it names the dimension. Hot and cold are not merely different; they sit at opposite ends of temperature.

This makes combinatorial entailment interesting. If A is the opposite of B and B is the opposite of C, then A and C are in coordination, because two reversals return you to where you started.

Worked example

A learner is taught that "hot" is the opposite of "cold", and that "cold" is the opposite of "warm-ish" in a training frame.

The derived relation between the first and third terms is one of sameness rather than opposition. Learners who have coordination and opposition both in repertoire produce this reliably, and probing it is a good test of whether the frame is genuinely established.

How to build a lesson for this frame

  1. Anchor the dimension

    Make the dimension explicit before training pairs. Opposition without a named dimension collapses into distinction.

  2. Train paired opposites

    Teach two or three opposite pairs to mastery within the same dimension, with error correction.

  3. Probe the double reversal

    Test whether two opposition steps yield coordination. This is the diagnostic probe for opposition specifically.

Common pitfalls

Mixing dimensions inside one lesson is the usual failure: pairing hot and cold with big and small in the same trial block gives the learner no stable dimension to frame along. The second pitfall is skipping the double-reversal probe, which is the only trial that distinguishes opposition from distinction.

Build a opposition lesson

Draft the trial structure in RFT App, then edit it into the program you actually want.

See how it works

Other relational frames

Coordination

Relating stimuli as the same or equivalent. The basis of naming.

Distinction

Relating stimuli as different, without specifying how.

Comparison

Relating stimuli along a graded dimension: more, less, bigger.

Hierarchical

Relating stimuli as member and category, part and whole.

Common questions

What is an opposition frame?
A relational frame that relates stimuli as opposites along a shared dimension, such as hot and cold or fast and slow.
What happens when you combine two opposition relations?
They yield coordination. If A is the opposite of B and B is the opposite of C, then A and C are the same, because two reversals cancel.