Big Brothers Big Sisters of America

a volunteer association in which individuals act as mentors and positive role models to children typically from single-parent families. The Big Brother and Big Sister programs were created separately, and the two organizations merged in 1977.

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Psychology term of the day

January 31st 2025

refractory

adj.

1. resistant to control, as in a disease or disorder that fails to respond to a typically efficacious therapy.

2. in neurophysiology, describing a neuron or muscle cell that is unable to respond to a stimulus. See refractory period.

3. stubborn, uncooperative, or unmanageable. —refractoriness n.