6 years: Frontal-lobe, parietal-lobe, and occipital-lobe fissurations are mostly complete {brain development, 6 years}. Brain is 90% of adult weight. Parietal-lobe and occipital-lobe surface areas are complete. Layer 2 is functional. Neural connections maximize at age 6, and pruning is later.
6 years: Children learn genital shapes. Children learn ethnic-group identifications {cognition development, 6 years}. Children learn prejudice, mostly from parents. Grade-school children know that minds have beliefs, hopes, and desires. Boys can do mazes better. Girls use verbal strategies for solving such problems more than boys. Young children do not understand false beliefs and unreal photographs, because they cannot represent fantasies yet. More boys than girls have reading difficulties. Boys have more restlessness at school and are more difficult to teach.
6 years: Boys can match colored blocks {Koh's blocks} {Koh blocks} to patterns, and do spatial ability tests, better than girls.
6 years: Children have 2500-word vocabularies and can read {language development, 6 years}.
6 years: Children average 1.15 meters and 21 kilograms {physical development, 6 years}. Abdomen is flat. Brain is 90% of adult brain. First tooth is lost. Children can throw balls well, count up to 9, go through mazes, and react to orientation changes, because they have learned up-down and right-left.
6 to 7 years: Ability to sustain attention increases greatly, in all cultures {cognition development, 6 to 7 years}. Children learn sex as people category.
Children explore and stimulate their bodies and genitals {sex development, 6 years}. Such exploration and stimulation is necessary for normal psychological sexual development. Before puberty, both boys and girls typically masturbate and achieve orgasm.
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Description of Outline of Knowledge Database
Date Modified: 2022.0225