In 1995, Neva M. Viise compared the spelling development of 195 child and 124 adult literacy learners by examining their spelling errors. Children and adults showed similar mastery in recognizing consonants and short vowel inclusions; however, the adults experienced much more difficulty marking syllables in words and were more likely to omit…

Data were collected between 1965 and 1971 concerning the physical status and school achievement of a nationally representative sample of Swedish pupils comprised of 360 girls and 380 boys. Pupils were followed from grade 3 through grade 9 of compulsory school. For boys, similar data were collected in connection with military enrollment. Main…