What is the defining feature of mood disorders?;Disturbances in mood such as depression or mania. What are the two main categories of mood disorders?;Depressive disorders and bipolar disorders. What characterizes a major depressive episode?;At least 2 weeks of depressed mood or loss of interest plus other symptoms. What are the two core symptoms of depression?;Depressed mood and loss of interest or pleasure. What additional symptoms are required for depression diagnosis?;At least 5 total symptoms including sleep, appetite, energy, guilt, concentration, suicidality. What is anhedonia?;Loss of interest or pleasure in activities. What is the difference between unipolar and bipolar disorders?;Unipolar involves only depression, bipolar includes mania/hypomania. What defines a manic episode?;Abnormally elevated or irritable mood with increased activity for at least 1 week. What symptoms characterize mania?;Grandiosity, decreased need for sleep, talkativeness, racing thoughts, distractibility, risky behavior. What is hypomania?;A milder form of mania without severe impairment. What distinguishes mania from hypomania?;Severity and functional impairment. What is bipolar I disorder?;At least one full manic episode. What is bipolar II disorder?;At least one hypomanic episode and one depressive episode. What is the prevalence pattern of depression by gender?;More common in women than men. What is the typical course of depression?;Episodic with risk of recurrence. What is a key risk after one depressive episode?;Increased likelihood of future episodes. What is the stress generation hypothesis?;Depressed individuals contribute to the occurrence of stressful events. What is the cognitive triad in depression?;Negative views about self, world, and future. What are schemas in cognitive theory?;Stable negative beliefs that bias information processing. What are cognitive distortions in depression?;Systematic errors in thinking (e.g., overgeneralization). What is learned helplessness?;Belief that one has no control over outcomes. What was revised in the learned helplessness model?;Inclusion of attributional style. What is a depressive attributional style?;Internal, stable, global explanations for negative events. What is rumination?;Repetitive focus on negative feelings and causes. Why is rumination maladaptive?;It maintains and worsens depression. What is behavioral activation theory?;Depression results from reduced positive reinforcement. How does behavioral activation treat depression?;By increasing engagement in rewarding activities. What is the role of serotonin in depression?;Implicated in mood regulation, though not a sole cause. What is the monoamine hypothesis?;Depression is caused by low levels of neurotransmitters. What is a limitation of the monoamine hypothesis?;It does not fully explain depression. What is neuroplasticity’s role in depression?;Reduced plasticity may contribute to symptoms. What is the HPA axis in depression?;Stress system often dysregulated in depression. What is a diathesis-stress explanation of depression?;Vulnerability interacts with stress to produce disorder. What is a common psychological treatment for depression?;Cognitive behavioral therapy (CBT). What is the goal of cognitive therapy in depression?;To modify negative thoughts and beliefs. What is a common biological treatment for depression?;Antidepressant medication (e.g., SSRIs). What is treatment-resistant depression?;Depression that does not respond to standard treatments. What is ECT used for?;Severe or treatment-resistant depression. What is a key risk factor for depression relapse?;Residual symptoms after recovery. What is a protective factor against depression?;Social support.