DEI Training: What It Can Change, What It Cannot, and How to Design It Well
August 2, 2026 · Diversity · 6 min read
DEI training can improve awareness, knowledge and some workplace behaviours, but training is not a substitute for fair systems, accessible work design or accountable management. The strongest evidence supports setting realistic expectations: a well-designed programme can help people recognise barriers and practise inclusive behaviours, while lasting organisational change usually depends on what happens before and after the training as well.
What DEI training is
DEI training is structured learning intended to help employees and managers understand diversity, equity and inclusion and apply that understanding in workplace decisions and behaviour. Depending on the organisation, it may cover inclusive communication, bias in decision processes, accessibility, fair recruitment, respectful conduct, psychological safety, reasonable adjustments, leadership behaviour and how employees should respond when they observe exclusion or discrimination.
CIPD’s 2026 workplace EDI guidance treats inclusion as part of core people processes, leadership behaviour and governance rather than a standalone campaign.
Source: CIPD, Equality, diversity and inclusion in the workplace, February 2026
What the evidence says about diversity training
A 2025 meta-analysis examined 12 studies of diversity training and workplace behaviour. It found a small but statistically significant positive effect on workplace behaviour, with an average effect size of g = 0.29. The authors also found indications that planning how trainees would transfer learning into work may improve transfer.
That finding supports a more cautious conclusion than claims that DEI training automatically produces large improvements in profitability, innovation or retention. The evidence supports modest behavioural effects in the studied settings, with important limits around programme design and measurement.
Training is only one type of D&I intervention
A 2025 systematic meta-review synthesised 37 reviews covering 12 categories of organisational diversity and inclusion interventions and 22 outcomes. It found comparatively higher-quality evidence for diversity training, but those effects were largely concentrated in awareness and learning outcomes. The review also identified positive outcomes associated with interventions such as workplace accommodations and job training in some diversity dimensions.
The practical lesson is that organisations should not ask training to solve problems that sit in recruitment rules, performance systems, workplace accessibility, promotion criteria or management practice.
What effective DEI training should try to change
Useful objectives are specific and observable. Examples include:
- managers applying job-related criteria consistently in selection or performance decisions;
- employees using inclusive meeting and communication practices;
- managers recognising when an employee may need an adjustment and following the organisation’s process;
- employees responding appropriately to disrespectful or discriminatory conduct;
- leaders recognising how informal access to assignments, information or sponsorship can create unequal opportunity;
- teams agreeing norms that make it safer to ask questions and offer different views.
Objectives such as “eliminate bias” or “create an inclusive culture in one workshop” are too broad to evaluate responsibly.
Awareness is not the same as behaviour change
Learning that a bias exists does not prove that workplace decisions will change. Training should therefore include opportunities to practise the behaviour the organisation wants people to use.
For managers, that can include:
- reviewing job criteria and selection evidence;
- working through promotion or performance cases;
- practising inclusive feedback;
- responding to a request for support or adjustment;
- handling an exclusion or conduct concern;
- facilitating a meeting where status or communication style affects participation.
Connect training with organisational systems
ISO 30415:2021 provides organisational guidance on diversity and inclusion covering governance, leadership, workforce responsibilities, recommended actions and measures. It is designed to be scalable across different kinds of organisations and national contexts.
Source: ISO 30415:2021, Human resource management — Diversity and inclusion
A training programme is stronger when the organisation also reviews the systems that employees return to. These can include:
- recruitment and selection;
- onboarding;
- work allocation;
- performance management;
- promotion and development;
- pay and reward;
- workplace accessibility and adjustments;
- employee voice and complaints;
- leadership accountability.
Do not use universal business-performance multipliers
Observational research can find associations between workforce composition and company outcomes, but that is not evidence that a training workshop caused the financial result. DEI training should not be sold with universal promises such as “35% higher performance”, “three times more innovation revenue” or guaranteed turnover savings unless a specific causal study directly supports the claim in a comparable population.
A more defensible business case starts with the organisation’s own problem. Examples include inconsistent selection decisions, weak employee voice, accessibility barriers, avoidable conduct issues or uneven access to development.
Adapt the programme to local context without stereotyping
Organisations in the GCC and Africa operate across different labour laws, languages, workforce structures and cultural contexts. Local adaptation matters, but it should not turn into claims that one nationality, generation, ethnic group or region behaves in a fixed way.
Useful adaptation includes:
- using locally relevant workplace scenarios;
- checking country-specific legal duties;
- addressing the actual workforce composition of the organisation;
- using appropriate language and examples;
- including accessibility and religious-practice considerations where relevant;
- testing whether imported terminology is understood by the audience.
The broad Diversity and Inclusion in the Workplace guide should own the wider organisational D&I topic. This page should remain focused on the role and limitations of training.
Should DEI training be mandatory?
There is no universal answer. Some training may be legally required in a particular jurisdiction or organisation, while other programmes are voluntary development activities. Programme owners should not assume that voluntary attendance automatically produces better outcomes or that mandatory attendance automatically creates backlash.
The 2025 workplace-behaviour meta-analysis found no statistically significant moderation effect for attendance policy in the 12 included studies. That is a useful reason to avoid sweeping claims in either direction.
Measure more than satisfaction
Evaluation can separate several questions:
| Level | Question | Possible evidence |
|---|---|---|
| Participation | Who completed the programme? | Attendance or completion records |
| Learning | Did knowledge or judgement improve? | Scenario assessment, knowledge check |
| Behaviour | Are people using the intended practices? | Observation, work samples, manager review |
| Process | Did the relevant people process improve? | Selection, promotion, accessibility or complaint data |
| Experience | Are employees experiencing inclusion differently? | Survey and qualitative feedback, interpreted carefully |
Demographic analysis requires privacy, legal and sample-size safeguards. A difference in an outcome is a signal to investigate, not automatic proof of discrimination or programme success.
A practical DEI training design sequence
- Define the workplace problem.
- Identify the decisions or behaviours that need to change.
- Check whether training is the right intervention.
- Use realistic workplace scenarios.
- Plan how learning will transfer into work.
- Review the related organisational processes.
- Measure learning and behaviour separately.
- Use the evidence to revise the programme.
DEI training can be useful. The evidence is strongest when expectations are specific, transfer is designed deliberately, and training is part of a wider organisational approach rather than presented as a shortcut to culture or financial performance.
Sources
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