Leadership, Power, Politics and Resistance

Introduction

Organizational change is rarely a purely technical exercise. New structures, technologies, policies and processes may be logically sound, yet fail because people interpret them through relationships, interests, identities and experiences of authority. Change therefore depends not only on planning and implementation, but also on leadership, sponsorship, influence, political judgment and the management of resistance.

In organizational development (OD), leadership refers to the process through which people create direction, meaning and coordinated action. Power concerns the capacity to influence decisions, resources and behaviour. Politics involves the use of influence in situations where interests, interpretations or resource claims differ. Resistance is not simply opposition to change; it may be a rational response to perceived loss, poor process, distrust, overload or threats to professional identity. Effective change leaders do not attempt to eliminate all resistance. They diagnose it, distinguish legitimate concerns from self-serving obstruction, and design responses that protect both organizational objectives and employee dignity.

This chapter examines change leadership and sponsorship, power and influence, organizational politics, coalitions, resistance, cynicism and change fatigue. It also develops practical approaches based on participation, negotiation, support, communication and trust-building.

Learning Objectives

By the end of this chapter, learners should be able to:

1. Explain the roles of change leaders, sponsors, agents and recipients.
2. Analyse power, influence and political behaviour during organizational change.
3. Diagnose different sources and forms of resistance, cynicism and change fatigue.
4. Select appropriate strategies involving participation, negotiation, support and trust.
5. Evaluate the ethical and governance implications of influence and resistance management.
6. Apply these concepts to a complex organizational change case.

1. Change Leadership and Sponsorship

1.1 Leadership as sensemaking and mobilization

Change leadership extends beyond issuing instructions. It involves at least four connected activities:

• Sensemaking: helping people understand what is changing, why it is necessary and how it connects with organizational purpose.
• Direction-setting: defining a credible future state and priorities.
• Mobilization: securing commitment, resources and coordinated effort.
• Meaning-making: connecting change with professional values, identity and worthwhile outcomes.

A leader may have formal authority but lack credibility. Conversely, an informal expert may have no senior title but substantially shape acceptance. Change leadership is therefore relational and contextual rather than reducible to hierarchy.

Transactional leadership can be useful when change requires clear targets, roles, incentives and accountability. Transformational leadership can be valuable when the organization must revise assumptions, identity or purpose. However, transformational rhetoric without resources, procedural fairness or follow-through can increase cynicism. Effective change leaders combine vision with operational competence and ethical consistency.

1.2 Sponsors, agents and recipients

A change sponsor is an individual or group with sufficient authority and legitimacy to authorize the change, allocate resources, remove barriers and demonstrate visible support. A sponsor is not merely the person who approves a project at its beginning. Sponsorship must continue through implementation, especially when the change becomes politically difficult.

A change agent coordinates diagnosis, design, communication, training and implementation. Change agents may be internal HR professionals, OD consultants, project managers or external consultants. They influence without always possessing formal authority and therefore depend heavily on relationships and credibility.

Change recipients are people whose work, status, routines, skills or employment conditions are affected. The term is preferable to “targets,” because it recognizes that employees interpret, adapt to and sometimes reshape change rather than simply receive it.

A useful sponsorship arrangement includes:

1.3 The sponsor coalition

Large changes normally require a coalition rather than a heroic individual. A coalition combines formal authority, technical expertise, operational knowledge, network centrality and employee legitimacy. It should include people who can authorize, interpret, implement and scrutinize the change.

Coalition-building involves identifying stakeholders, assessing their interests and influence, and creating a sequence of engagement. Stakeholder analysis should not be treated as a simplistic exercise in labelling people “for” or “against” change. A stakeholder may support the strategic objective but oppose the process, or support the process while fearing personal consequences.

A practical stakeholder assessment considers:

1. What does the stakeholder stand to gain or lose?
2. What information or expertise does the stakeholder possess?
3. What formal and informal influence can the stakeholder exercise?
4. What history shapes the stakeholder’s trust or distrust?
5. What form of involvement is appropriate and ethical?

2. Power, Influence and Organizational Politics

2.1 Power in organizations

Power is the capacity to affect outcomes, behaviour or interpretations, even when others do not initially agree. French and Raven’s classic framework identifies several bases of power:

• Legitimate power: authority derived from a formal position.
• Reward power: control over valued benefits.
• Coercive power: ability to impose penalties or unwanted consequences.
• Expert power: influence based on valued knowledge or competence.
• Referent power: influence arising from respect, identification or personal credibility.

Contemporary organizations also rely on information power, network power and control over meaning. A person who controls access to data, meetings or senior decision-makers may exercise substantial influence without formal authority. Likewise, professionals can use expertise to define what counts as a valid problem or credible solution.

Power is not necessarily unethical. Authority is needed for coordination, accountability and the protection of legitimate interests. The ethical problem arises when power is concealed, coercive, discriminatory or used to benefit a narrow group at the unjust expense of others.

2.2 Influence tactics

Influence is the exercise of power in a particular interaction. Common tactics include rational persuasion, consultation, inspirational appeal, coalition-building, exchange, personal appeals, ingratiation, pressure and legitimating claims. Their effectiveness depends on the situation and the relationship between the parties.

Rational persuasion is appropriate when evidence and transparency are valued. Consultation can create ownership when employees genuinely have the ability to shape decisions. Coalition-building can demonstrate broad support, but it may become manipulative if used to isolate dissenters. Pressure may produce short-term compliance but often damages trust and encourages superficial acceptance.

A key distinction is between compliance, commitment and resistance. Compliance means performing what is required, often without personal endorsement. Commitment involves willingness to invest discretionary effort. Resistance involves objection, delay, avoidance or counter-mobilization. A change may be implemented through compliance but remain fragile if commitment is absent.

2.3 Organizational politics

Organizational politics refers to influence behaviour involving competing interests, scarce resources and contested interpretations. Politics is not necessarily dysfunctional. It can enable neglected issues to gain attention and can protect minority viewpoints. It becomes destructive when it relies on deception, retaliation, exclusion, hidden agendas or the manipulation of procedural rules.

Change intensifies politics because it redistributes resources, status, autonomy and opportunities. A restructuring may create new leadership positions while eliminating others. A digital system may increase transparency for senior management but reduce discretion for frontline employees. A new performance system may alter whose work is visible and whose expertise is valued.

Political analysis should therefore examine both the stated business case and the distributional consequences. Questions include:

• Who defines the problem?
• Who controls the evidence?
• Who participates in design and approval?
• Whose work becomes more or less valuable?
• Who bears risk if the change fails?
• Which groups have voice, and which groups are silent?

3. Coalition-Building and Influence Mapping

Coalitions are most durable when they combine shared purpose with explicit acknowledgement of differences. A coalition should clarify its decision rights, evidence standards, communication responsibilities and methods for handling disagreement. It should avoid becoming a closed inner circle that excludes affected groups.

An influence map can classify stakeholders according to two dimensions: the degree to which they are affected and the influence they can exercise. High-impact, high-influence stakeholders require close engagement. High-impact, low-influence groups require protection, representation and accessible voice. Low-impact, high-influence stakeholders require careful alignment because they can accelerate or obstruct implementation. Low-impact, low-influence stakeholders should still receive appropriate information and channels for feedback.

This analysis should be revisited. Influence changes as the project moves from design to implementation. Employees who initially appear peripheral may become critical when local adaptation is required. A senior sponsor may have high influence at approval but limited credibility among technical specialists.

4. Understanding Resistance to Change

4.1 Resistance as a multidimensional phenomenon

Resistance is behaviour or communication that delays, modifies, challenges or prevents a change. It can be overt, such as formal opposition, or covert, such as withholding information, symbolic compliance or repeated postponement. Resistance can also be constructive when it identifies safety risks, unrealistic assumptions or inequitable consequences.

A simplistic view treats resistance as an employee deficit: people are labelled fearful, irrational or uncommitted. A more useful view asks what the resistance is communicating. It may indicate:

• inadequate information;
• loss of autonomy, status, income or job security;
• low trust in leaders;
• poor implementation design;
• incompatible workload or skills;
• prior experiences of broken promises;
• threats to professional identity;
• concerns about fairness, privacy or safety;
• genuine disagreement about strategic direction.

Resistance may be directed at the content of change, the process used to introduce it, the timing, the leadership, or the personal consequences. These dimensions require different responses.

4.2 A diagnostic framework

Before choosing an intervention, diagnose resistance across five questions:

1. What is the object of resistance? Is the objection to the goal, method, timing, leadership or consequences?
2. Who is resisting? Individuals, occupational groups, managers, unions, professional communities or external stakeholders?
3. What is the form? Voice, exit, delay, silence, work-to-rule, political lobbying, absenteeism or informal adaptation?
4. What is the source? Information, interests, identity, capability, trust, workload or ethics?
5. What response is proportionate? Explanation, redesign, participation, negotiation, training, support, boundary-setting or formal action?

A diagnostic interview should use open questions such as: “What concern would you want addressed before this change proceeds?” and “What evidence would alter your view?” Leaders should listen for interests beneath positions. For example, “We will not use the new system” may express fear of surveillance, inadequate training or a belief that the system is unsafe.

4.3 The change curve and its limitations

People often experience disruption through phases such as surprise, denial, frustration, exploration and adaptation. These phases can be useful as a conversational metaphor, but they should not be treated as a universal psychological law. Individuals may move in different directions, experience several reactions simultaneously or respond constructively from the outset. Managers should avoid using stage models to stereotype employees or excuse poor implementation.

5. Cynicism and Change Fatigue

5.1 Organizational cynicism

Organizational cynicism involves a negative belief that leaders or the organization lack integrity, competence or genuine concern. It can arise when leaders repeatedly announce initiatives that are abandoned, when participation is symbolic, or when stated values conflict with decisions.

Cynicism has three related elements:

• Belief: the organization is unlikely to act consistently with its claims.
• Emotion: frustration, contempt or distrust.
• Behaviour: sarcasm, withdrawal, negative informal communication or non-cooperation.

Cynicism should not be dismissed as negativity. It may be an accumulated record of organizational experience. Restoring trust requires evidence over time: keeping commitments, admitting mistakes, explaining constraints and aligning rewards with stated values.

5.2 Change fatigue

Change fatigue is a condition of depleted energy and reduced willingness to engage after repeated or poorly supported change efforts. It can result from initiative overload, insufficient recovery time, conflicting priorities, unclear benefits and continuous uncertainty. Symptoms include reduced discretionary effort, increased errors, emotional exhaustion, passive compliance and declining confidence that initiatives will last.

Leaders can reduce fatigue by creating a change portfolio rather than launching isolated projects. The portfolio should identify dependencies, stop low-value initiatives, sequence demands, protect learning time and measure implementation capacity. Capacity is not simply employee willingness; it includes staffing, skills, managerial attention, technology and psychological resources.

6. Responses to Resistance and Political Challenge

6.1 Participation and voice

Participation can improve decision quality, reveal operational risks and increase procedural fairness. It is most credible when participants have timely information, sufficient competence, genuine influence and feedback about how their input was used. Consultation that cannot alter any decision should be described honestly as consultation for input, not shared decision-making.

Participation may take several forms:

• information sharing;
• consultation and listening sessions;
• joint problem-solving;
• representative committees;
• pilot testing;
• delegated decision authority;
• collective bargaining or formal negotiation.

Participation is not always appropriate for every decision. Confidentiality, legal requirements, urgency or technical constraints may limit involvement. Even then, leaders should explain the boundary and provide voice on implementation issues.

6.2 Negotiation and exchange

Negotiation is appropriate when groups have legitimate interests that cannot be satisfied identically. Effective negotiation separates positions from interests, identifies objective criteria and explores options that preserve dignity and operational viability. It should not be used to pressure employees into surrendering rights or accepting unsafe conditions.

Negotiation may address staffing, timing, role redesign, training, redeployment, compensation, performance expectations and transition arrangements. Agreements should specify responsibilities, review points and what happens if assumptions prove false.

6.3 Education, training and support

Information alone does not create capability. Employees may understand why a change is needed and still lack skills, time or confidence to implement it. Support can include training, coaching, job aids, peer networks, counselling, workload relief, technical help and temporary performance adjustments.

Training should be role-specific and practice-oriented. It should include opportunities to make mistakes safely and should be evaluated through demonstrated competence rather than attendance alone. Managers also require support because they often absorb employee anxiety while implementing decisions they did not design.

6.4 Trust-building

Trust is a judgement about another party’s competence, benevolence and integrity. It is strengthened when leaders are predictable, transparent about uncertainty, capable of delivery and willing to accept accountability. Trust is not created by motivational language alone.

Practical trust-building behaviours include:

• explaining what is known, unknown and undecided;
• distinguishing facts from aspirations;
• acknowledging losses as well as benefits;
• applying criteria consistently;
• protecting people who raise legitimate concerns;
• reporting progress and setbacks;
• correcting misinformation without humiliating critics;
• honouring commitments or renegotiating them openly.

6.5 When resistance should be challenged

Not every objection deserves accommodation. Leaders may need to set boundaries where behaviour is abusive, discriminatory, deliberately deceptive or incompatible with safety and law. The response should target conduct rather than silence disagreement. A healthy organization can distinguish dissenting ideas from unacceptable behaviour.

7. Ethical and Governance Considerations

Change leadership raises significant ethical questions. Employees may face redundancy, surveillance, loss of professional autonomy or unequal exposure to risk. A legitimate business case does not automatically justify every method.

Important principles include:

• Procedural fairness: affected people receive a meaningful opportunity to understand, question and influence relevant decisions.
• Distributive fairness: benefits, burdens and risks are not allocated arbitrarily.
• Respect for dignity: communication avoids humiliation, deception and coercive manipulation.
• Transparency: leaders disclose material information and conflicts of interest.
• Accountability: decision-makers accept responsibility for consequences.
• Protection of voice: whistle-blowers and good-faith critics are not retaliated against.
• Privacy and data governance: employee data used in change initiatives is collected lawfully, proportionately and securely.

HR professionals must be alert to the misuse of engagement data, sentiment analysis and performance analytics. Artificial intelligence may help identify patterns of workload, turnover risk or communication reach, but it can also reproduce bias, infer sensitive characteristics or create a chilling effect. AI outputs should not be treated as neutral evidence. Human review, explainability, data minimization and avenues for challenge are essential.

8. Illustrative Case: The Atlas Transformation

Background

Atlas Services, a fictional regional organization with 2,400 employees, announced a digital transformation involving a new customer platform, centralized support services and redesigned performance measures. Senior executives presented the programme as essential for improving service quality and reducing duplication. A programme director was appointed, and the chief executive became the formal sponsor.

Problem

Six months after launch, implementation was behind schedule. Customer-service employees reported that the platform was difficult to use and increased call-handling time. Experienced staff believed the new performance measures undervalued problem-solving and rewarded speed. Middle managers privately supported the old system because it preserved their discretion. The chief executive sent repeated messages about “embracing the future,” but rarely attended local meetings. Employees described previous initiatives that had been abandoned after substantial effort. Informal messages began referring to the programme as “another executive fashion.”

Analysis

The problem was not simply resistance to technology. It involved several interacting factors:

1. Content concerns: usability and performance metrics appeared poorly designed.
2. Process concerns: frontline users had not participated meaningfully in design.
3. Power shifts: centralized support threatened local managerial autonomy.
4. Identity concerns: expert service work was being reduced to speed indicators.
5. Trust deficit: previous abandoned initiatives made executive promises less credible.
6. Capacity constraints: training occurred during peak workloads.
7. Weak sponsorship: the formal sponsor was visible in announcements but absent from problem-solving.

Approach and solution

The programme director created a coalition including frontline employees, union representatives, service managers, IT specialists, HR and finance. The coalition mapped stakeholders and separated non-negotiable outcomes from adjustable design features. It conducted structured observations of customer work, tested the platform in three pilot sites and suspended the most problematic performance indicator.

The chief executive publicly acknowledged that the first design had underestimated operational complexity. Local sponsors were given authority to adapt implementation within defined boundaries. Training was redesigned around realistic customer scenarios, and temporary workload relief was provided. A monthly “you said, we changed” report documented employee input, decisions and unresolved issues. Managers received coaching in difficult conversations, while a formal process addressed deliberate sabotage and abusive conduct.

Outcome

After nine months, adoption increased substantially, average handling time returned close to its pre-implementation level and employee perceptions of procedural fairness improved. Not all opposition disappeared, and some jobs were still redesigned. However, resistance shifted from generalized distrust to specific, evidence-based disagreement. The programme team also postponed two lower-priority initiatives to reduce fatigue.

Learning points

The case demonstrates that resistance may contain valuable operational knowledge. Sponsorship requires visible action, not only communication. Participation is most credible when it changes design. Political analysis reveals how metrics and structures redistribute power. Trust improves when leaders admit error and provide evidence of follow-through. Finally, implementation capacity must be managed as carefully as the technical project plan.

9. A Practical Change Leadership Process

A disciplined process can integrate the chapter’s concepts:

1. Clarify the case for change: define the problem, evidence, desired outcomes and ethical constraints.
2. Map stakeholders and power: identify interests, influence, risks, alliances and excluded voices.
3. Build a legitimate coalition: include formal sponsors, local leaders, experts, representatives and affected employees.
4. Diagnose resistance: distinguish content, process, identity, capability, trust and fairness concerns.
5. Design participation: specify what is open for influence, by whom and by when.
6. Prepare support: align training, staffing, technology, coaching and psychological resources.
7. Sequence implementation: manage interdependencies and avoid excessive simultaneous demands.
8. Communicate with candour: report uncertainty, trade-offs, losses, progress and setbacks.
9. Monitor both outcomes and experience: assess performance, adoption, workload, fairness, trust and unintended effects.
10. Learn and adapt: revise the change when evidence warrants it and close the feedback loop.

Useful indicators include adoption quality, training competence, employee voice, turnover, absence, workload, grievance patterns, trust perceptions and achievement of intended operational outcomes. No single metric captures commitment; quantitative indicators should be combined with interviews, observations and representative feedback.

Challenges and Limitations

Change leadership frameworks can oversimplify complex realities. Power maps may freeze relationships that are actually fluid. Surveys may measure stated attitudes without revealing political risk or silent resistance. Participation can consume time and create frustration if decision rights are unclear. Coalition-building may reproduce existing inequalities if only influential voices are invited. Trust-building is slow and cannot be manufactured through a communication campaign.

Leaders must also recognize that some conflicts are structural rather than interpersonal. A respectful manager cannot fully resolve a change that creates unavoidable job losses or contradictory performance demands. In such situations, ethical leadership means making trade-offs explicit, providing fair processes and support, and refusing to promise outcomes that cannot be delivered.

Chapter Summary

Change is a social and political process as well as a technical one. Effective change leadership provides direction, creates meaning, mobilizes resources and maintains accountability. Sponsors authorize and protect change, while local sponsors, agents, managers and recipients contribute different forms of capability and legitimacy.

Power arises from formal authority, rewards, coercion, expertise, relationships, information and networks. Politics is unavoidable where change redistributes resources, status or autonomy; it becomes harmful when influence is deceptive, retaliatory or exclusionary. Coalitions should combine authority with operational knowledge and employee legitimacy.

Resistance may concern the content, process, timing, leadership or personal consequences of change. It can reveal genuine risks and should be diagnosed rather than stereotyped. Cynicism reflects accumulated distrust, while change fatigue reflects depleted capacity after repeated or poorly supported initiatives. Participation, negotiation, training, support and trust-building are appropriate responses when matched to the source of concern.

Ethical change leadership protects dignity, fairness, voice, privacy and accountability. Technology and AI can support diagnosis but require careful governance. Sustainable change depends on visible sponsorship, credible participation, realistic sequencing, honest communication and evidence that leaders learn from experience.

Key Terms

Change agent: A person or group that facilitates the design and implementation of change.

Change fatigue: Depleted energy and reduced willingness to engage after repeated or poorly supported change.

Change recipient: A person or group whose work, identity or conditions are affected by change.

Change sponsor: An authority-holder who authorizes, resources and visibly supports change.

Coalition: A group combining influence and shared purpose to advance or shape change.

Commitment: Willingness to invest effort and support a change beyond minimal compliance.

Compliance: Conforming to a requirement without necessarily endorsing it.

Cynicism: A negative belief that organizational leaders or systems lack integrity, competence or concern.

Expert power: Influence based on valued knowledge or competence.

Influence: The exercise of power in a particular relationship or interaction.

Legitimate power: Authority derived from a formal organizational position.

Organizational politics: Influence behaviour involving competing interests, scarce resources and contested meanings.

Participation: Involvement of affected people in understanding, designing or implementing change.

Power: The capacity to affect decisions, behaviour, resources or interpretations.

Procedural fairness: Perceived fairness of the process used to make and implement decisions.

Resistance: Behaviour or communication that challenges, delays, modifies or prevents change.

Referent power: Influence arising from respect, identification or personal credibility.

Sponsorship: Visible authorization, support and protection of a change initiative.

Stakeholder: A person or group affected by, interested in or able to influence a change.

Trust: A judgement that another party is competent, benevolent and likely to act with integrity.

Review Questions

Short Answer Questions

1. Distinguish the roles of a change sponsor, change agent and change recipient.
2. What are the main bases of power identified by French and Raven?
3. Why should resistance be diagnosed rather than automatically suppressed?
4. Define organizational cynicism and change fatigue.
5. State two conditions under which participation is likely to be credible.

Long Answer Questions

1. Explain how power and politics influence organizational change, using appropriate examples.
2. Discuss the relationship between visible sponsorship, trust and change commitment.
3. Compare participation, negotiation, education and support as responses to resistance.
4. Critically evaluate the usefulness and limitations of stage-based models of change reactions.
5. Explain the ethical responsibilities of HR professionals when change involves surveillance, job redesign or potential redundancies.

Analytical / Application Questions

1. A hospital introduces an electronic record system. Nurses support the stated safety goal but refuse to use the new workflow because it increases documentation time and was designed without frontline input. Diagnose the resistance and recommend a response sequence.
2. A company has launched six major initiatives in two years. Employee surveys show declining trust, increased workload and widespread statements that “nothing lasts.” Analyse the causes of cynicism and change fatigue and design a leadership response.
3. A restructuring coalition consists entirely of senior executives and external consultants, while affected employees and union representatives are excluded. Evaluate the coalition’s power and legitimacy, and propose a more ethical governance arrangement.

Multiple Choice Questions with Answers

Question 1

Which responsibility most clearly belongs to a change sponsor?

A. Authorizing the change and protecting resources

B. Conducting every employee training session

C. Replacing all local managers

D. Avoiding operational feedback

Correct Answer: A. Authorizing the change and protecting resources

Question 2

Influence based on valued knowledge or competence is known as:

A. Coercive power

B. Expert power

C. Reward power

D. Legitimate power

Correct Answer: B. Expert power

Question 3

Which statement best describes organizational politics?

A. It is always unethical behaviour

B. It occurs only among senior executives

C. It involves influence amid competing interests and scarce resources

D. It disappears when a formal structure exists

Correct Answer: C. It involves influence amid competing interests and scarce resources

Question 4

A complaint that a new performance metric undervalues professional judgement is primarily resistance concerning:

A. Identity and content

B. Office location only

C. Communication technology only

D. Employee attendance only

Correct Answer: A. Identity and content

Question 5

Which condition makes participation most credible?

A. Employees are invited after all decisions are final

B. Participants can influence relevant decisions and receive feedback

C. Only supporters are allowed to contribute

D. Participation replaces all formal accountability

Correct Answer: B. Participants can influence relevant decisions and receive feedback

Question 6

Change fatigue is most directly associated with:

A. Excessive recovery time

B. Repeated demands and inadequate implementation capacity

C. High levels of role clarity

D. Stable priorities and manageable workloads

Correct Answer: B. Repeated demands and inadequate implementation capacity

Question 7

Which action is most likely to rebuild trust after a failed initiative?

A. Denying that problems occurred

B. Using motivational slogans without operational changes

C. Acknowledging errors and demonstrating follow-through

D. Punishing all critics

Correct Answer: C. Acknowledging errors and demonstrating follow-through

Question 8

Why can resistance be constructive?

A. It may reveal safety, design or fairness problems

B. It guarantees that change should be abandoned

C. It eliminates the need for leadership

D. It proves employees lack commitment

Correct Answer: A. It may reveal safety, design or fairness problems

Question 9

Which practice is ethically appropriate when using AI in change analytics?

A. Treating algorithmic outputs as unquestionable facts

B. Collecting unlimited personal data

C. Providing human review, transparency and avenues for challenge

D. Using hidden predictions to punish dissent

Correct Answer: C. Providing human review, transparency and avenues for challenge

Question 10

In the Atlas case, what most directly shifted resistance toward productive disagreement?

A. Excluding frontline employees from later decisions

B. Suspending all performance measurement permanently

C. Combining pilots, employee input, honest acknowledgement and design adaptation

D. Increasing slogans about embracing the future

Correct Answer: C. Combining pilots, employee input, honest acknowledgement and design adaptation