In the 1970s, a 13-year-old girl was found locked up in a room, strapped to a potty chair. since she had grown up in a world without human speech, researchers studied "genie's" ability to acquire words, grammar, and pronunciation. this type of research is called a case study representative sample single-blind study naturalistic observation

Early 18th century british industries were generally small scale and relatively unsophisticated. most textile production, for example, was centred on small workshops or in the homes of spinners, weavers and dyers: a literal ‘cottage industry’ that involved thousands of individual manufacturers. such small-scale production was also a feature of most other industries, with different regions specialising in different products: metal production in the midlands, for example, and coal mining in the north-east.two illustrations of 18t