Moreover, Trofimova pointed out that intellectual activity uses analytic differentiation of contextual information whereas a tempo of activity uses more explicit, readily available and well-defined behavioural elements. For this reason, the scale of Intellectual Tempo within Rusalov's model might reflect a tempo of pre-learned cognitive elements but not an analytic activity. Trofimova suggested that only the scales of only Motor and Social-verbal Tempo (but Intellectual Tempo) should stay in the model whereas the speed of generation of less-defined behavioural integration should be called Plasticity. By the same logic, Motor and Social Plasticity represent manipulation of well-defined behavioural elements and these traits describe therefore tempo- and not plasticity-related aspects. For this reason Trofimova suggested to consider only one and not three types of Plasticity and two types of Tempo. Rusalov's model was also missing the scales of Impulsivity, Self-Confidence, sensation seeking, and empathy – but these scales were added in the STQ-77 and the Functional Ensemble of Temperament model. Activity-specific approach in temperament was employed in: