Psychological studies of change examine how individuals respond to transitions, disruptions, losses and new circumstances, including their emotional, cognitive, behavioural, social and spiritual effects, and the processes through which people adapt, develop resilience and find meaning.
Early psychoanalytic perspectives, particularly those of Sigmund Freud (1923), emphasised unconscious conflict and the influence of internal psychological processes on behaviour, while Kurt Lewin (1947) conceptualised change as a dynamic process involving the interaction between individuals and their environments, proposing the influential three-stage model of unfreezing established patterns, moving towards new behaviours and refreezing them into relatively stable arrangements.
Jean Piaget (1952) explained cognitive development through assimilation and accommodation, whereby people incorporate new experiences into existing mental frameworks or modify those frameworks when they no longer adequately explain reality. Leon Festinger (1957) argued that cognitive dissonance (the discomfort arising from conflicting beliefs, attitudes or actions) can motivate individuals to change their attitudes or behaviour to restore psychological consistency. Research into stress and coping further clarified the effects of change: Richard Lazarus and Susan Folkman (1984) proposed that stress depends partly on how individuals appraise a situation and their perceived resources for managing it, distinguishing problem-focused coping, which seeks to alter the situation, from emotion-focused coping, which seeks to regulate emotional responses. Elisabeth Kübler-Ross (1969) described denial, anger, bargaining, depression and acceptance in accounts of responses to dying and bereavement; although influential in popular understandings of change and loss, these stages should not be treated as a universal, fixed or sequential process.
William Bridges (1980) distinguished external change from internal psychological transition, describing endings, a neutral zone and new beginnings, while James Prochaska and Carlo DiClemente (1983) developed the transtheoretical model of intentional behaviour change, identifying processes commonly described as precontemplation, contemplation, preparation, action and maintenance, with the recognition that progress may involve relapse or recycling through stages.
Albert Bandura (1977) demonstrated the importance of self-efficacy (belief in one's capacity to perform actions) in motivating persistence and adaptation, while Carol Dweck (2006) popularised the distinction between fixed and growth mindsets, suggesting that beliefs about whether abilities can develop influence responses to challenge, feedback and failure. George Bonanno (2004) challenged assumptions that major adversity necessarily produces prolonged psychological disturbance, documenting resilience as a common trajectory following potentially traumatic events, although outcomes vary according to individual and contextual factors. Richard Tedeschi and Lawrence Calhoun (1996) introduced the concept of post-traumatic growth to describe perceived positive psychological changes that some people report through struggling with adversity, without implying that trauma is necessary for growth or that suffering invariably produces benefit.
Taken together, these perspectives suggest that change can provoke anxiety, grief, uncertainty, resistance and temporary disruption of identity or functioning, but that its effects depend on appraisal, coping strategies, social support, personal agency, prior experience and the meaning attributed to events; effective adaptation may involve acknowledging loss, tolerating uncertainty, revising assumptions, establishing realistic goals, developing new habits and drawing on supportive relationships.
A Christian perspective complements these psychological accounts by understanding change within the larger context of creation, human freedom, suffering, repentance, hope and transformation: Paul's exhortation to be “transformed by the renewing of your mind” (Romans 12:2) resonates with psychological accounts of revising beliefs and patterns of behaviour, while the call to put away the old self and “clothe yourselves with the new self” (Ephesians 4:22–24) provides a theological image of moral and spiritual renewal. Scripture also acknowledges the emotional reality of transition: Ecclesiastes 3:1–8 recognises seasons of change, Psalm 34:18 presents God as near to the broken-hearted, and Philippians 4:6–9 commends prayer, discernment and the cultivation of constructive attention amid anxiety.
From an Eastern Orthodox perspective, change is not merely adjustment to external circumstances or self-directed improvement but may also be understood as metanoia (repentance or a profound reorientation of mind and life) and as participation in theosis, the lifelong process of becoming more fully united with God by grace. Athanasius of Alexandria (c. 318/1980) connected human salvation with participation in divine life, while Gregory Palamas (c. 1338–1357/1983) articulated the distinction between God's inaccessible essence and God's communicable energies, providing an important theological framework for understanding participation in divine life without the erasure of the distinction between Creator and creature.
Orthodox spiritual practice emphasises prayer, repentance, the sacramental life, fasting, humility, compassion and guidance within the Church, not as techniques that guarantee psychological well-being but as practices through which people may cultivate discernment, patience, hope and a transformed relationship with suffering. The Orthodox tradition's emphasis on synergy (the cooperation of divine grace and human freedom) can be placed in constructive dialogue with psychological accounts of agency and coping, provided that spiritual struggle is not confused with mental illness or used to blame people for suffering. Thus, psychological research and Orthodox theology offer distinct but potentially complementary accounts: psychology investigates the mechanisms and outcomes of adaptation, whereas Christian theology situates personal transformation within relationship with God, the community and the sure hope of resurrection (2 Corinthians 4:16–18).