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germ layer

any of the three layers of cells in an animal embryo at the gastrula stage, from which the various organs and tissues develop. The outermost layer is the ectoderm, the middle layer is the mesoderm, and the inner layer is the endoderm.

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Psychology term of the day

May 8th 2024

reinforcement of alternative behavior

reinforcement of alternative behavior

a procedure that involves eliminating reward or reinforcement for an undesired behavior and instead rewarding a desired behavior. Also called rewarded alternative method.