Trait Pessimism Predicts Vulnerability to Stress-Induced Anhedonia in Rats

Evidence That Emotion Mediates Social Attention in Rhesus Macaques

(2012) Emily J. Bethell et al.   PLoS One

Laughing Rats Are Optimistic

(2012) Rafal Rygula et al.   PLoS One

Agitated Honeybees Exhibit Pessimistic Cognitive Biases

(2011) Melissa Bateson et al.   CURRENT BIOLOGY

Measuring judgement bias and emotional reactivity in sheep following long-term exposure to unpredictable and aversive events

(2011) Rebecca E. Doyle et al.   PHYSIOLOGY & BEHAVIOR

Stereotyping starlings are more ‘pessimistic’

(2010) Ben O. Brilot et al.   ANIMAL COGNITION

Understanding vulnerability for depression from a cognitive neuroscience perspective: A reappraisal of attentional factors and a new conceptual framework

(2010) Rudi De Raedt et al.   COGNITIVE AFFECTIVE & BEHAVIORAL NEUROSCIENCE

Dogs showing separation-related behaviour exhibit a ‘pessimistic’ cognitive bias

(2010) Michael Mendl et al.   CURRENT BIOLOGY

Early Life Stress Enhances Behavioral Vulnerability to Stress through the Activation of REST4-Mediated Gene Transcription in the Medial Prefrontal Cortex of Rodents

(2010) S. Uchida et al.   JOURNAL OF NEUROSCIENCE

Long-lasting cognitive deficit induced by stress is alleviated by acute administration of antidepressants

(2010) Agnieszka Nikiforuk et al.   PSYCHONEUROENDOCRINOLOGY

Ambiguous-Cue Interpretation is Biased Under Stress- and Depression-Like States in Rats

(2009) Thomas Enkel et al.   NEUROPSYCHOPHARMACOLOGY

The Evolution of the Cognitive Model of Depression and Its Neurobiological Correlates

(2008) Aaron T. Beck   AMERICAN JOURNAL OF PSYCHIATRY