Overacting (also referred to as hamming or mugging) refers to acting that is exaggerated. These polynomials give the eigenvalues of the distance relation matrices of the Hamming scheme. Hamming thereby created a family of mathematical error-correcting codes, which are called Hamming codes. Concerning the latter, she wrote that the cast was filled with "actors hamming it up". Other examples of classical block codes include Golay, BCH, Multidimensional parity, and Hamming codes. The first error-correcting code was the Hamming(7,4) code, developed by Richard W. Hamming in 1950. To decode the [8,4] Hamming code, first check the parity bit. These were positioned to maximize the Hamming distance between their bit patterns. In between the extremes are moderate windows, such as Hamming and Hann. The Hamming distance is the total number of misplaced tiles. This approach works for the Hamming distance over d-dimensional vectors formula 49. He invented the concepts known as Hamming codes, Hamming windows, Hamming numbers, and Hamming distance. In 1950, Hamming introduced the [7,4] Hamming code. The associated defective "metric" is known as Hamming distance.