Chapter 1. Introduction Research questions In sum, the main research questions for this dissertation are as follows: Part I: Why are basic skills important? 1. Do early basic skills predict adult life satisfaction, and how does this association evolve across the adult life span? (Chapter 2) 2. In which life domains do early basic skills predict individuals’ satisfaction in adulthood? (Chapter 2) Part II: How do basic skills develop? 3. To what extent does early skill proficiency relate to later skill proficiency? (Chapter 3) 4. Do significant disparities in achievement exist among students during the early years and at the end of primary education? (Chapter 3) 5. Do varying basic skills relate to each other during primary education? (Chapter 4) Part III: Do environmental factors affect student performance? 6. How does temperature affect students’ basic skill test scores? (Chapter 5) 10
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