Characteristics of Depression

Characteristics of Depression

Depression — or more precisely, major depressive disorder (MDD) — is one of the most prevalent mental health conditions worldwide. It is characterised by persistent low mood and a loss of interest or pleasure in activities, accompanied by a range of cognitive, behavioural, and somatic (bodily) symptoms. The AQA specification requires understanding of depressive characteristics across three domains: behavioural, emotional, and cognitive.

Diagnostic Criteria

According to DSM-5, a diagnosis of major depressive disorder requires at least five of a specified set of symptoms to be present for at least two weeks, with at least one of the five being either depressed mood or loss of interest/pleasure (anhedonia). The symptoms must represent a change from previous functioning and cause significant distress or impairment in daily life.

Behavioural Characteristics

Depression produces marked changes in behaviour. Activity levels are typically reduced — the person may withdraw from social activities, hobbies, and work, ceasing activities that were previously enjoyable (anhedonia). Psychomotor retardation is common: observable slowing of movements, speech, and responses that others can notice. Conversely, some individuals show psychomotor agitation — restless, purposeless movement such as pacing or wringing hands.

Changes in sleep are very common: most depressed individuals experience insomnia (particularly early morning waking), though some experience hypersomnia (sleeping excessively). Changes in appetite and weight are also characteristic — typically reduced appetite and weight loss, though some individuals overeat. In severe cases, the person may neglect personal hygiene and self-care, and — most critically — depression is associated with suicidal behaviour in a proportion of sufferers.

Emotional Characteristics

The emotional hallmark of depression is persistent low mood — a pervasive, enduring sense of sadness, emptiness, or hopelessness that is qualitatively different from ordinary sadness and does not lift in response to positive events. This is often accompanied by loss of pleasure (anhedonia) — the inability to feel enjoyment from activities that were previously pleasurable. Many individuals also experience heightened anxiety alongside depression, and extreme guilt or worthlessness — often disproportionate to any actual failing. In some cases, the person may feel emotionally flat or numb rather than acutely sad — an absence of emotional response rather than negative affect.

Cognitive Characteristics

Depression is associated with characteristic patterns of negative thinking. Beck's cognitive triad (explored in detail in the treatment benchmark) describes a negative view of the self (worthless, inadequate), the world (hostile, unfair, presenting only obstacles), and the future (hopeless, with no prospect of improvement). Depressed individuals typically show poor concentration and indecisiveness — difficulty maintaining attention or making decisions. Negative thinking is pervasive: the person selectively attends to negative information, interprets ambiguous events negatively, and recalls negative memories more readily than positive ones. In severe cases, there may be recurrent thoughts of death or suicide, and in psychotic depression, delusions or hallucinations with a depressive theme may be present.