Variation in the Form of Pavlovian Conditioned Approach Behavior among Outbred Male Sprague-Dawley Rats from Different Vendors and Colonies: Sign-Tracking vs. Goal-Tracking

Christopher J. Fitzpatrick, Shyam Gopalakrishnan, Elizabeth S. Cogan, Lindsay M. Yager, Paul J. Meyer, Vedran Lovic, Benjamin T. Saunders, Clarissa C. Parker, Natalia M. Gonzales, Emmanuel Aryee, Shelly B. Flagel, Abraham A. Palmer, Terry E. Robinson, Jonathan D. Morrow