Psychological problems Study Guide

Albert Ellis's ABC model is a psychological explanation of how irrational beliefs can lead to psychological distress, particularly depression. The model suggests that it's not the activating event (A) itself that causes emotional and behavioural consequences (C), but rather an individual's belief (B) about that event. For example, if someone experiences a setback (A) like failing an exam, their belief (B) about this event determines their emotional response. If they hold a rational belief, such as 'I didn't study enough, I'll try harder next time,' the consequence (C) might be disappointment but motivation to improve. However, if they hold an irrational belief, such as 'I'm a complete failure, I'll never succeed at anything,' the consequence (C) is likely to be negative emotions like sadness, hopelessness, and potentially depression. The core of the model lies in identifying and challenging these irrational beliefs to promote more rational thinking and healthier emotional outcomes. The model further posits that these irrational beliefs often take the form of demands ('I must succeed') or global evaluations ('I am worthless'), which are rigid and unrealistic. Therapeutic approaches based on this model, such as Rational Emotive Behavior Therapy (REBT), aim to help individuals dispute (D) these irrational beliefs and develop new, more effective (E) ways of thinking and behaving, leading to an improved emotional state.

Clinical depression, also known as major depressive disorder, is a serious mood disorder that goes beyond normal feelings of sadness. To be diagnosed, an individual must experience a depressed mood or loss of pleasure in activities for at least two weeks, alongside several other symptoms that cause significant distress or impairment in daily functioning. These characteristics can be emotional, such as persistent sadness, anhedonia (loss of pleasure), and feelings of worthlessness; behavioural, like changes in activity levels (either reduced or agitated), sleep disturbances (insomnia or hypersomnia), and changes in appetite/weight; and cognitive, including difficulty concentrating, indecisiveness, and recurrent thoughts of death or suicide. Biological explanations of clinical depression often focus on neurochemical imbalances, particularly involving neurotransmitters like serotonin and noradrenaline. The 'monoamine hypothesis' suggests that a deficiency in these monoamine neurotransmitters in the brain's synaptic gaps leads to depressive symptoms. Serotonin is linked to mood regulation, sleep, and appetite, while noradrenaline is associated with alertness and energy. Other biological factors considered include genetic predispositions, where certain genes may increase vulnerability to depression, and structural abnormalities in brain regions such as the prefrontal cortex and hippocampus, which are involved in mood, cognition, and memory. Hormonal imbalances, particularly those related to stress hormones like cortisol (as seen in the HPA axis dysfunction), can also play a role in the development and maintenance of depressive symptoms. Understanding these biological underpinnings helps inform pharmacological treatments, such as selective serotonin reuptake inhibitors (SSRIs), which aim to restore neurotransmitter balance.