As a model of anxiety disorder vulnerability. male Wistar-Kyoto (WKY) rats acquire lever-press avoidance behavior more readily than outbred Sprague Dawley rats. and their acquisition is enhanced by the presence of a discrete signal presented during the inter-trial intervals (ITIs). suggesting it is perceived as a safety signal. https://safeersappliancers.shop/product-category/integrated-fridge-freezers/