Which of the following describes the sample in Study 1 of Blackwell et al. (2007)?
99 students from a single seventh-grade class at a public secondary school in New York City
373 students from four successive seventh-grade classes at one New York public school
373 students drawn from seventh-grade classes at four different secondary schools in several US states
99 students aged 11 to 16 from secondary schools in both England and New York
104 exam-style questions on OCR GCSE Psychology 2.2 Theories/Explanations, covering 2.2.1 Piaget's four invariant stages, 2.2.2 Assimilation and accommodation, 2.2.3 Object permanence, animism, egocentrism, 2.2.4 Decentration, reversibility, conservation; criticisms, 2.2.5 Cognitive Development research study: Piaget (1952), 2.2.6 Dweck's fixed and growth mindsets, 2.2.7 Willingham's learning styles and meaning; criticisms, and 2.2.8 Learning research study: Blackwell et al. (2007). Each one has a worked solution and a mark scheme showing where the marks go.