Using an Ambiguous Cue Paradigm to Assess Cognitive Bias in Gorillas (Gorilla gorilla gorilla) during a Forage Manipulation

In nonhumans, ‘optimism’ is often defined as responding to an ambiguous item in the same manner as to items previously associated with reward (or lack of punishment), and “pessimism” is defined as responding to an ambiguous item in the same manner as to items previously associated with a lack of reward (or with punishment). We […]