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.
Response rates in each session for each participant in the immediate-history condition of Experiment 1. FR/DRL and Test (FR/DRL), respectively, identify the multiple FR DRL training and the multiple FR DRL testing phases in which a multiple FR DRL schedule was in effect. Test (FI/FI) identifies the multiple FI FI testing phase in which a multiple FI FI schedule was in effect. Horizontal bars indicate the durations of successive experimental periods.
