All topicsSTATE OF AI REPORT. 2018

Learning once, adapting to new tasks

A model trained for one task need not start from scratch on the next. The 2018 report explained how reusing learned features could reduce the data required for new applications. Alongside this progress, experiments in games and attacks on image classifiers showed how uneven machine intelligence remained.

Questions in this section

Why did transfer learning matter in 2018?Did strong image recognition mean robust perception?What did a pretrained model contribute to a new task?Which medical example illustrated transfer learning?Did transfer learning remove the need for task-specific training?What was an adversarial image example?Why was ordinary image accuracy an incomplete measure of progress?How did AlphaZero learn without historical human games?

Transfer learning makes prior work reusable

A pretrained image-recognition network can supply useful visual features for a new task, such as identifying skin lesions. The report used this example to explain why reusing knowledge could make AI practical with smaller specialist datasets. It did not mean a model could adapt to any task without new training or evaluation.

Transfer learning makes prior work reusable - 2018 report, PDF page 8
Transfer learning makes prior work reusable. 2018 report, PDF page 8

Seeing an object is different from understanding it

The report showed that small, deliberately chosen changes to an image could lead a classifier to a wrong answer. Such adversarial examples exposed a gap between high benchmark accuracy and reliable perception. They mattered for applications where an apparently minor input change could alter a consequential decision.

Seeing an object is different from understanding it - 2018 report, PDF page 48
Seeing an object is different from understanding it. 2018 report, PDF page 48

Self-play provided another route to learning

AlphaZero illustrated a different starting point from transfer learning: a system could improve by playing against itself instead of learning from historical human games. The report described a single neural network predicting moves and the chance of winning from a board position. Its success in Go showed what learning from experience could achieve in a game with clear rules and feedback.

Self-play provided another route to learning - 2018 report, PDF page 37
Self-play provided another route to learning. 2018 report, PDF page 37

Evidence you can use

AI progress in the 2018 report

Historical snapshot: June 2018. Dates and populations are specified per row.

AI progress in the 2018 report
MeasureReported valueDefinition and source
Transfer-learning exampleSkin-lesion classificationRepurposing features from the InceptionV3 image-recognition network.2018 report, PDF page 8
Robustness exampleAdversarial image perturbationsIllustrated failure mode of image classifiers; not a population-wide error rate.2018 report, PDF page 48

These are research examples from 2018, not clinical recommendations or a measurement of general intelligence. Transfer performance depends on the relationship between the original and new tasks; adversarial examples illustrate vulnerabilities rather than normal-use error frequency.

Frequently asked questions

Why did transfer learning matter in 2018?

It allowed a model to reuse features learned on one problem when training for another, potentially reducing the amount of new task-specific data needed. The report illustrated this with image-recognition features adapted to skin-lesion classification.

Source: 2018 report, PDF page 8.

Sources and dates

Historical snapshot published June 29, 2018. This web edition was prepared on 2026-10-11 from the online deck and original launch posts. Findings and forecasts retain their original time frame.

  1. 2018 report, PDF page 8Original 2018 report. This edition has no printed slide numbers. References use one-based PDF pages.
  2. 2018 report, PDF page 37Original 2018 report. This edition has no printed slide numbers. References use one-based PDF pages.
  3. 2018 report, PDF page 48Original 2018 report. This edition has no printed slide numbers. References use one-based PDF pages.
  4. State of AI Report 2018: online slides
  5. Stories from Air Street launch essayJuly 29, 2018.

Cite this page

Benaich, Nathan, and Ian Hogarth. “Learning once, adapting to new tasks.” State of AI Report 2018. Historical report snapshot; web edition prepared 2026-10-11.