
Can an apprentice use generative AI to tackle work that sits beyond the formal training curriculum? A new field experiment with 673 final-year IT apprentices in Germany suggests that the answer can be yes—at least for carefully defined, computer-based tasks. The finding matters because it shifts the discussion from whether AI can make learners faster at familiar exercises to whether it can help early-career workers attempt a wider range of professional tasks.
The result is promising, but it needs careful interpretation. The study measured performance on structured tasks during an experiment, not long-term job competence or workplace productivity. It also compared access to ChatGPT and the internet with a no-internet control condition. This article explains what the researchers found, where the evidence stops, and how apprenticeship providers can design AI-supported practice without confusing a stronger assisted answer with durable skill.
What the 673-apprentice experiment tested
The working paper, Task Expansion with Generative AI: Experimental Evidence on Middle-Skilled, Early-Career Workers, was written by researchers affiliated with the University of Erlangen-Nuremberg, the ifo Institute, the Technical University of Munich, the Federal Institute for Vocational Education and Training (BIBB), and other institutions. It was published as an IZA Discussion Paper in October 2026 and is a working paper, not a peer-reviewed journal article.
The researchers conducted a preregistered field experiment during regular school hours from October 2025 to January 2026. The sample comprised 673 final-year apprentices from twelve vocational schools in six German states. Participants were training in two occupations: application development and system integration. Within each school, apprentices were randomly assigned to a group with access to ChatGPT Pro and the wider internet or to a control group completing the tasks without internet access.
After a baseline task, participants completed three occupation-specific tasks. One was aligned with the formal apprenticeship curriculum; two were designed to approximate tasks associated with entry-level software- or network-engineering work beyond that curriculum. Teachers from the relevant occupations reviewed the tasks and scoring rubrics.
The task examples were concrete. Application-development apprentices worked on algorithmic problem-solving, software architecture and resilience, and machine learning. System-integration apprentices worked on IPv4 subnet planning, a zero-trust security concept, and a hybrid-cloud concept. This design allowed the researchers to compare performance on familiar curricular work with performance on tasks that stretched beyond the qualification pathway.
What changed when apprentices had access to AI?
The paper reports increases of 26 to 44 percentage points in task performance across the three post-baseline tasks. The largest average gain—44 percentage points—occurred on the task within the apprenticeship curriculum. On the two tasks deliberately placed beyond the curriculum, the gains were 26 and 31 percentage points.
The ifo Institute’s public summary gives another way to understand the result: on the university-level tasks, apprentices using ChatGPT earned around 70% of the possible points, compared with around 41% without AI. On the final vocational-exam-level task, the reported scores were around 66% with AI and 22% without it. These are scores in the experimental tasks, not evidence that apprentices suddenly acquired a university degree’s worth of expertise.
| Finding | What it means |
|---|---|
| +44 percentage points on the within-curriculum task | AI also amplified performance on work apprentices were already being taught. |
| +26 and +31 percentage points on the two beyond-curriculum tasks | AI helped apprentices produce stronger answers on tasks outside their formal training scope. |
| More substantive attempts on some difficult tasks | AI sometimes helped learners begin work they might otherwise leave unanswered. |
| No reduction in immediate unaided comprehension | Short multiple-choice checks immediately after tasks did not show a comprehension penalty. |
The study therefore provides evidence of AI-enabled task expansion: with an AI assistant available, apprentices could perform more successfully on some tasks beyond their current training. It does not show that every apprentice can independently perform those tasks after the tool is removed.
Did AI help apprentices understand the work?
Immediately after each task, apprentices answered short comprehension questions without AI assistance. In the full sample, access to AI was associated with increases of 6.7 percentage points on the within-curriculum task, 9.7 points on the first beyond-curriculum task, and 4.4 points on the second beyond-curriculum task. The researchers report no evidence of lower immediate comprehension in the AI group.
This is an important counterpoint to the assumption that every use of AI necessarily weakens understanding. But the measure was short-term and narrow: multiple-choice questions administered immediately after the task. It does not establish what learners remembered several weeks later, whether they could transfer the method to a different problem, or whether they could carry out the work safely in a live production environment.
The researchers also note that a small share of participants used AI during at least one comprehension block despite instructions not to do so. Their robustness checks excluding those participants did not overturn the main pattern. Even so, a delayed, unaided assessment would be needed to make a stronger claim about retained learning.
Why AI literacy mattered more than prior educational background
The treatment effects were generally larger among apprentices who reported stronger AI-use skills. The differences were concentrated in practical abilities—using the tool effectively for a task—rather than simply knowing technical facts about how AI works. The paper did not find a systematic pattern in which apprentices with higher pre-apprenticeship educational qualifications benefited more.
This matters for vocational education and training. In the study’s descriptive data, 84% of apprentices reported using AI at vocational school, while only 16% said they learned how to use it properly there. AI use was already common, but formal instruction in effective use was much less common.
That gap is a curriculum issue, not just a software issue. If learners are expected to use AI in technical work, they need structured opportunities to define a problem, provide relevant context, ask for explanations, test suggestions, recognise uncertainty, and verify the result against professional standards. A prompt-writing lesson alone is not enough.
What the study does not prove
- It does not prove long-term learning. The comprehension checks were immediate. The paper calls for reassessment after days or weeks to test recall, application, and transfer without AI.
- It does not isolate AI from internet access. The treatment group had ChatGPT Pro and broader internet access; the control group had no internet. The authors acknowledge that this comparison may overstate the effect relative to a realistic internet-only workplace condition.
- It does not represent every occupation. The sample covered two IT apprenticeship specialisations in Germany’s dual system. Results may differ in construction, health care, hospitality, administration, manufacturing, or other national training systems.
- It does not establish safe independent performance. A high score on a structured task is not the same as being authorised to deploy code, change a network, or make a safety-critical decision without supervision.
- It is not yet peer-reviewed journal evidence. The paper is available as an IZA Discussion Paper and a Stanford Digital Economy Lab working paper. Its preregistered design is a strength, but independent review and replication remain valuable.
These distinctions are important when comparing this result with other workplace research. Prowad has separately examined a 487-worker trial on generative AI and skill acquisition, which asked whether improved performance with AI translated into greater technical knowledge without it. That is a different outcome from task expansion during an assisted task. Likewise, our analysis of a 2,574-employee adaptive workplace-training trial focused on personalised learning pathways and knowledge outcomes, not the ability to attempt tasks beyond a formal apprenticeship curriculum.
Six design rules for AI-supported apprenticeships
1. Map tasks by distance from the curriculum
Start with the occupational standard and identify three levels: core tasks learners should already be able to perform, adjacent tasks that extend those skills, and stretch tasks that normally sit beyond the current qualification. This makes it possible to use AI for extension without losing sight of the competence the programme is meant to certify.
2. Record unaided baseline performance
Before introducing AI, ask learners to complete a short task without assistance. Keep the rubric focused on observable criteria such as accuracy, reasoning, security, documentation, and the ability to explain decisions. A baseline helps trainers distinguish a learner’s existing capability from the extra output produced with a tool.
3. Teach a repeatable AI workflow
Model a sequence: define the task, provide only the necessary context, ask for a proposed approach, request an explanation of assumptions, test the output, and document what was changed. Apprentices should practise checking code, calculations, network configurations, and technical recommendations against trusted documentation—not simply accepting a fluent answer.
4. Require an explanation, not just a deliverable
After an AI-assisted task, ask the apprentice to explain the solution in their own words, identify one alternative, and name a possible failure mode. In technical fields, a learner might be asked to explain why a subnet plan works, what a zero-trust design protects against, or how a machine-learning result could be misleading. This makes reasoning visible to the trainer.
5. Fade support and test transfer
Use AI first as a scaffold on an unfamiliar task. Then change the scenario, remove some prompts or hints, and ask the learner to complete a comparable task with less support. For outcomes that require independent competence, include a short unaided assessment and repeat it after a delay. Do not assume that immediate comprehension guarantees retention.
6. Keep a human supervisor accountable
Trainers and workplace mentors should decide which tasks are suitable for AI assistance, which outputs require expert review, and which activities must remain unaided for assessment or safety. They should also check data protection, access to approved tools, accessibility, and whether learners have enough time and support to develop effective AI-use skills.
A practical 30-day pilot for a training provider
A provider does not need to redesign an entire qualification to test the idea. A bounded pilot can begin with one occupational unit and a small group of apprentices.
- Days 1–5: Select the task. Choose one core task and one adjacent or stretch task. Ask an occupational expert to confirm that the stretch task is relevant and safe for supervised practice.
- Days 6–10: Set the assessment. Create a baseline task, an AI-assisted task, an immediate explanation check, and a delayed unaided task. Use the same scoring rubric wherever possible.
- Days 11–20: Run guided practice. Teach learners to use AI, verify outputs, record important changes, and flag uncertainty. Trainers should log common errors and the kinds of assistance learners actually need.
- Days 21–25: Test without the scaffold. Give learners a new but comparable problem. Ask them to explain their decisions and identify where AI output could fail.
- Days 26–30: Review the evidence. Compare assisted output, unaided understanding, delayed performance, time, error patterns, and trainer workload. Decide whether to adapt, expand, or stop the pilot.
For providers reviewing their wider programme, the OECD’s 2026 report on developing vocational education and training with AI offers a system-level perspective. Drawing on a survey across 25 countries and case studies in ten countries, it describes AI applications in labour-market analysis, competency mapping, curriculum drafting, and quality checks. The OECD emphasises that human validation, governance, data quality, and collaboration with practitioners remain essential.
For a broader introduction to the field, see Prowad’s guide to AI in vocational education and training. The present article focuses more narrowly on what happens when an apprentice uses AI to attempt a task beyond the formal curriculum.
Conclusion: expand the task, not the claim
The 673-apprentice experiment offers a useful signal: generative AI can help some early-career IT learners produce stronger work on tasks beyond their formal training, while the study’s immediate comprehension checks show no short-run penalty. That is meaningful evidence for designing more ambitious, supervised practice.
But task expansion is not the same as qualification, mastery, or long-term learning. Apprenticeship providers should measure both what learners can accomplish with AI and what they can explain, retain, and transfer without it. The strongest approach is neither to ban AI from vocational learning nor to treat assisted output as proof of competence. It is to use AI to widen practice opportunities while keeping assessment, professional judgement, and accountability firmly human.
Featured image: IT learners in a technical training environment. Photo by RUT MIIT on Unsplash.
Sources
- Brosch, H. et al. (2026). Task Expansion with Generative AI: Experimental Evidence on Middle-Skilled, Early-Career Workers. Stanford Digital Economy Lab working paper; IZA Discussion Paper No. 18999.
- IZA. IZA Discussion Paper No. 18999, October 2026.
- ifo Institute. IT Apprentices in Germany Can Solve University-Level Problems Using AI, 29 October 2026.
- OECD (2026). Developing Vocational Education and Training with Artificial Intelligence, 23 June 2026.









