Circuits can refer to measurements of particular circuits as studied by neuroimaging techniques, and/or other measures validated by animal models or functional neuroimaging (e.g., emotion-modulated startle, event-related potentials with established source localization).
Physiology refers to measures that are well-established indices of certain constructs, but that do necessarily not tap circuits directly (e.g., heart rate, cortisol).
Behavior can refer variously to behavioral tasks (e.g., a working memory task) or to systematic behavioral observations (e.g., a toddler behavioral assessment).
Self-Reports refer to interview-based scales, self-report questionnaires, or other instruments that may encompass normal-range and/or abnormal aspects of the dimension of interest.
