Group
111Group theory — is a mathematical discipline, the part of abstract algebra that studies the algebraic structures known as groups. The development of group theory sprang from three main sources: number theory, theory of algebraic equations, and geometry. The… …
112Group psychotherapy — is a form of psychotherapy in which one or more therapists treat a small group of clients together as a group. The term can legitimately refer to any form of psychotherapy when delivered in a group format, including Cognitive behavioural therapy… …
113Group dynamics — is the study of groups, and also a general term for group processes. Relevant to the fields of psychology, sociology, and communication studies, a group is two or more individuals who are connected to each other by social relationships. [Forsyth …
114Group of death — is an informal sobriquet used in football and other team sports to describe a situation that often occurs during the group stage of a tournament (such as the first round of the World Cup), where:* all the teams present in one group are considered …
115Group buying — Group buying, also known as collective buying, offers products and services at significantly reduced prices on the condition that a minimum number of buyers would make the purchase. Origins of group buying can be traced to China[citation needed]… …
116Group polarization — is the tendency of people to make decisions that are more extreme when they are in a group as opposed to a decision made alone or independently. Overview Study of this effect has shown that after participating in a discussion group, members tend… …
117Group marriage — Group marriage, also known as multi lateral marriage, is a form of polyamory in which more than two persons form a family unit, with all the members of the group marriage being considered to be married to all the other members of the group… …
118Group Analysis — is a method of group psychotherapy originated by S. H. Foulkes in the 1940s’. Group work was perhaps born of the need to deal economically and efficiently with a large body of returning soldiers with shared problems, but it soon developed into a… …
119Group affective tone — represents the consistent or homogeneous affective reactions within a group5,6. Group affective tone is an aggregate of the moods of the individual members of the group and refers to mood at the group level of analysis. If the moods of the… …
120Group delay and phase delay — Group delay is a measure of the time delay of the amplitude envelopes of the various sinusoidal components of a signal through a device under test, and is a function of frequency for each component. Phase delay is a similar measure of the time… …
