Purpose: Quick respiratory hyperkinesia can be difficult to detect with the naked eye. A clinical method is described for the detection and quantification of quick respiratory hyperkinesia. Method: Flow at the airway opening is sensed during spontaneous apnea (rest), voluntary breath holding (postural fixation), and voluntary volume displacement…

Traces continuities between current approaches and earlier traditions in developmental psychology. Contends that current work often ignores commonalities with previous work within psychology. Explores the fate of Piaget's clinical method and its continuities and contrasts with current approaches. Maintains that the conflict generated by the…