Meaning and Verbal Behavior in Skinner's Work from 1934 to 1957.

Amalia et al. traced how Skinner changed his mind about meaning between 1934 and 1957.

They read every paper, note, and letter Skinner wrote in those years.

The authors show that in 1945 Skinner stopped asking "What does this word mean?" and started asking "What makes a person say this word now?"

Skinner flipped the problem upside-down. Instead of meaning living inside words, meaning lives in the three-term contingency: the setting, the response, and what follows it.

Words do not carry meaning like a suitcase. The environment carries the meaning, and the word is just the behavior that pops out.

Moss (2009) gives you the raw notes from Skinner’s 1947 course right after the flip happened. Those notes let you watch the new idea being taught for the first time.

Abbott (2013) repeats the same move for today’s jargon. Stop fighting over the "real" definition of "mand" and look at what contingencies make you say "mand" in the clinic.

Vargas (2013) adds the next layer: form matters only because the verbal community taught us to react to it. The 1945 shift is the base; form-versus-function is the roof.

Freeman et al. (2015) turns the 1945 insight into a lesson plan. PEAK lessons teach kids with autism the same way: control the environment, not the dictionary.

When a client keeps saying "I’m anxious," stop digging for the hidden feeling. Ask what happened right before the word and what happens after. Change the triggers or the consequences and the word may drop out. Skinner’s 1945 lens keeps you focused on what you can actually measure and change.