There are three levels of joint attention&colon; triadic, dyadic, and shared gaze. This explanation would predict a monadic effect, although weaker than the dyadic one. Some authors generalize from the term "dyadic" to related terms "triadic", "tetradic" and "polyadic". They considered both dyadic developmental psychotherapy and holding therapy. Thibaut and Kelley based their theory principally on small groups related with dyadic relationships. However, most changes in hierarchical rank are caused by dyadic interactions. Humans have matured over a long period of time in dyadic and group contexts. By duality, H(T ) is the sum of n+1 translation of dyadic H. See also logistic map, dyadic transformation, and tent map. This notation can be confused with the dyadic product between two vectors. This number is larger than zero but less than all positive dyadic fractions. Sensitivity to dyadic orientation plays a major role in the development of dyadic attention. Although there are various modes of exchange, Homans centered his studies on dyadic exchange. This means BMO(T ) is the intersection of n+1 translation of dyadic BMO. There are five operations for a dyadic to another dyadic.