family-wise alpha level

a set value of the probability of making a Type I error when carrying out a set of hypothesis tests (e.g., when conducting multiple comparisons within a data set). In many studies, family-wise alpha is kept at .05, such that there is only a 5% total chance of rejecting a null hypothesis when it should be retained over a set of tests.

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Psychology term of the day

November 18th 2024

Labor Management Relations Act

a series of amendments to the National Labor Relations Act that were passed in 1947 to adjust the power balance between unions and employers in the United States, the previous system being regarded as too restrictive of management. The act identified and prohibited certain unfair labor practices of both unions and employers, created the Federal Mediation and Conciliation Service to aid in resolution of disputes, and provided a mechanism for dealing with strikes that create a national emergency. Sponsored by U.S. lawyer and politician Robert Alphonso Taft (1889–1953) and U.S. politician Fred Allan Hartley Jr. (1902–1969), it is also known as the Taft–Hartley Act.