Square dance square dance, very rarely are two modern Western dances ever alike. Like traditional square dancing, recovering from occasional mistakes is often part of the fun. Dancers are encouraged to dance only those programs at which they are reasonably proficient, the default level of achievement being the Mainstream program. All programs are set by Callerlab, the callers' international association, which also governs the training of callers. Irish and Scottish dances are normally done to traditional tunes. English dances may be done to traditional tunes, though, especially at ceilidhs, there is experimentation with many different musical styles. The two types of American
Search activity concept Search activity concept Search activity concept (SAC) is a psychophysiological concept that integrates subject’s behavior, resistance to stress and deteriorating factors, pathogenetic mechanisms of different mental and psychosomatic disorders, REM sleep functions, brain monoamines activity and brain laterality. The term SAC was coined during the 1970s by V.S. Rotenberg together with V.V. Arshavsky on the basis of the physiological investigations on humans and animals according to the role of different forms of behaviour in body resistance to stress and diseases. SAC distinguishes the following types of behaviour: All forms of behaviour that contain SA belong to coping and increase the