Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Experimental design of Experiment 4 from Todd (2013).
| Group | Acquisition | Extinction | Test 1 | Test 2 |
|---|---|---|---|---|
|
| ||||
| Ext-B | A:R1+ B:R2+ C: − |
A:R2− B:R1− C: − |
A:R2−; B:R2−? | A:R2−; C:R2−? |
|
|
|
|||
| Ext-C | A:R2− B: − C: R1− |
A:R2−; B:R2−? | A:R2−; C:R2−? | |
A, B, and C refer to contexts. R1, R2: lever press and chain pull responses, counterbalanced. +/− : presence or absence of a reinforcer, respectively. − : context exposure without the lever or chain present.
