Glossary L

Lesion means damage to a structure. Lesions is derived from Latin laesio, meaning "to hurt" any pathologic or traumatic discontinuity of brain tissue. Depending on their size and location, Lesions result in minor or major behavioral effects.

Lesion method refers to the method of investigating the functions performed by different areas of the brain by correlating impaired function with the location of damage to the brain.

- Leta Stetter Hollingworth (1886-1939) : Leta Stetter Hollingworth rejected the belief, popular at the time, that women achieve less than males do because they are intellectually inferior to males; instead her explanation emphasized differences in social opportunity. Her career focused on improving the education of both subnormal and gifted students.

Lethal dose is defined as a dose of a drug at which a given percentage of individuals die within a specified time

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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