# Verbal behaviour change in long-stay psychiatric patients : As a function of ratio schedules of token reinforcement

> 1976 doctoral thesis by William Alexander Murray Black at University of Canterbury

**Wikidata**: [Q112837394](https://www.wikidata.org/wiki/Q112837394)  
**Source**: https://4ort.xyz/entity/verbal-behaviour-change-in-long-stay-psychiatric-patients-as-a-function-of-ratio-schedules-of-token-reinforcement


## References

1. [Source](http://hdl.handle.net/10092/6772)