In what ways can environmental factors cause intellectual deficits? Can children recover from such deficits?

Essay from the year 2004 in the subject Psychology - Developmental Psychology, grade: 2.1, Oxford Brookes University, language: English, abstract: Many researchers have tried to identify environmental factors that can cause intellectual deficits. These include malnutrition, deprivation of parental care, abuse, prenatal drug exposure or exposure to stress hormones, parental style and so on. It is i...