# Environmental factors in depression

> IB Psychology · IB Psychology 2027 First Assessment
> Source: https://www.owlsprep.com/study/ib-psychology-hwb-environmental-factors-in-depression/

The role of one or more environmental factors in understanding/explaining mental health disorders.

## Learning objectives

- The role of one or more environmental factors in understanding/explaining mental health disorders.

## How often is this tested?

Based on OwlsPrep's analysis of official CIE IB_PSYCH P2 past papers (2019–2025): **Environmental factors in depression** appears **9 times** in the last 7 years — **3.1%** of all P2 questions (9 of 288).

Most-tested forms: Essay: Contrast (22 marks) (5), Essay: To what extent (22 marks) (2), Essay: Discuss (22 marks) (2).

## Core concept

Environmental explanations locate the causes of a disorder outside the person's biology — in life events, relationships and social conditions. Classic work links the onset of depression to severe stressful life events (loss, adversity) and especially to the absence of a close, confiding relationship, which normally acts as a protective buffer. More recent work shows depressive symptoms even appear to cluster within social networks. These factors rarely act alone: the same event affects people differently depending on their vulnerability, so environment is best read as the trigger in a diathesis-stress picture.

## Key studies

IB Psychology answers must be supported by named studies. Learn these to cite as evidence:

**Patten (1991)** — Replications of Brown and Harris (1978) confirmed that lacking an intimate relationship substantially raises depression risk — an effect likened in size to smoking's role in atherosclerosis. — *Anchors social/environmental risk (life events and lack of a confiding relationship) as a factor in depression.*

**Rosenquist, Fowler, and Christakis (2011)** — Depressive symptoms were correlated between people up to three degrees of separation in a social network, suggesting person-to-person spread. — *Extends 'environment' to the social network itself as a factor in depression.*

## Evaluation (AO3)

**Strength — modifiable, real-world targets** — It identifies changeable factors (social support, life stress) and predicts individual differences in who becomes depressed after the same event.

**Limitation — correlational and bidirectional** — Evidence is largely correlational — stressful environments and depression may reinforce each other, and network 'contagion' can reflect shared environments or homophily rather than causation.

## Scope

> **note**
>
> This card is environmental factors in a mental health disorder (depression). Biological and cognitive explanations of the same disorder are HWB_1 and HWB_2; stress specifically is HWB_7; sociocultural factors in non-disorder health problems are HWB_6.

## Common pitfalls

- **Wrong:** Treating a stressful environment as a direct, sufficient cause of depression (or, conversely, ignoring environment in favour of pure biology).
  - Why it fails: A frequently penalised misconception in IB Psychology exams.
  - Correct: Environmental evidence is largely correlational and interacts with vulnerability — the syllabus wants factors integrated (a biopsychosocial view), not an environment-only or biology-only story.

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