Often humans are asked to label data with classifications or other information in order to guide the training of supervised learning. algorithms. This may be by domain experts as part of knowledge elicition, or by crowdsourcing of data, for example through reCAPTCHA, or people naming their day-to-day activities.
Also known as: expert labelling
Used in glossary entries: crowdsourcing, reCAPTCHA, supervised learning

reCAPTCHA – human creating training data for machine learning

Expert labelling used alongised unsupervised learning

Hybrid expert system incorporating machine learning guided by human expertise.