Haber and Levin's second experiment used 15 blocks, 15 books and 15 unknown objects.
Calculate the percentage of objects in the field that were unknown objects. Give your answer to one decimal place.
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Markscheme
8.2 Studies Questions
40 exam-style questions on Edexcel GCSE Psychology 8.2 Studies, covering 8.2.1 Haber and Levin (2001) and 8.2.2 Carmichael, Hogan and Walter (1932). Each one has a worked solution and a mark scheme showing where the marks go.