g According to Spearman, the factor of general intelligence underlying all intelligent performance.
Ganglion cells Cells in the visual system that integrate impulses from many bipolar cells in a single firing rate.
Gate-control theory A theory about pain modulation that proposes that certain cells in the spinal cord act as gates to interrupt and block some pain signals while sending others on to the brain.
Gender A psychological phenomenon that refers to learned sex-related behaviors and attitudes of males and females.
Gender identity One's sense of maleness or femaleness; usually includes awareness and acceptance of one's biological sex.
Gender roles Sets of behaviors and attitudes associated by society with being male or female and expressed publicly by the individual.
General adaption syndrome (GAS) The pattern of nonspecific adaptational physiological mechanisms that occurs in response to continuing threat by almost any serious stressor.
Generalized anxiety disorder An anxiety disorder in which an individual feels anxious and worried most of the time for at least six months when not threatened by any specific danger or object.
Generativity A commitment beyond one's self and one's partner to family, work, society, and future generations; typically, a crucial step in development in one's 30s and 40s.
Genes The biological units of heredity; discrete sections of chromosomes responsible for transmission of traits.
Genetics The study of the inheritance of physical and psychological traits from ancestors.
Genocide The systematic destruction of one group of people, often an ethnic or racial group, by another.
Genotype The genetic structure an organism inherits from its parents.
Gestalt psychology A school of psychology that maintains that psychological phenomena can be understood only when viewed as organized, structured wholes, not when broken down into primitive perceptual elements.
Gestalt therapy Therapy that focuses on ways to unite mind and body to make a person whole.
Glia The cells that hold neurons together and facilitate neural transmission, remove damaged and dead neurons, and prevent poisonous substances in the blood from reaching the brain.
Goal-directed selection A determinant of why people select some parts of sensory input for further processing; it reflects the choices made as a function of one's own goals.
Ground The backdrop or background areas of the visual field, against which figures stand out.
Group dynamics The study of how group processes change individual functioning.
Group polarization The tendency for groups to make decisions that are more extreme than the decisions that would be made by the members acting alone.
Group think The tendency of a decision-making group to filter out undesirable input so that a consensus may be reached, especially if it is in line with the leader's viewpoint.
Guided search In visual perception, a parallel search of the environment for single, basic attributes that guides attention to likely locations of objects with more complex combinations of attributes.