Glossary L

Letter level is defined as the level of written perception in which a visual stimulus is represented as a letter of the alphabet.

Letter of recommendation refers to a letter expressing an opinion regarding an applicant’s ability, previous performance, work habits, character, or potential for success.

Letter-sound correspondences is the principle that each letter represents a unit of sound (a phoneme).

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Leucocytes refers to white blood cells that find and destroy antigens

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Leukemia is a cancer originating in blood or blood-producing cells. Leukemias are cancers that are found in the blood and bone marrow.

Leukocyte is white blood cell; a component of the immune system Leukocytes, moreover, are white blood cells (WBCs). The key cells to the immune system.

Lev Semionovich Vygotsky (1896-1934) Vygotsky was born in Russia in the same year as Piaget. Vygotsky was not trained in science but received a law degree from the Moscow University.

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Deutsch: Ebene / Español: Nivel / Português: Nível / Français: Niveau / Italiano: Livello /

Level refers to the degree of behavior change with different interventions (for example, high or low).

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