Answer: Suppress or conceal negative emotional reactions
Explanation: Middle to late childhood is a period that lasts from early childhood, that is, from about six years of age, to adolescence, i.e up to eleven - twelve years. This is the so-called school age, as children at that age begin to acquire some basic education, gain control of their body's motor and physical skills that they could not control in the previous period. In addition to changes in the physical, there are also changes in the psychological sense. Thus, during this period, children also learn the reasoning and the fact that they cannot always and everywhere express all their feelings, especially the negative ones. This means that they become more flexible in expressing their emotions. During this period, children realise and reason that apart from the family where they were able to express all their emotions, there is an outside world beyond the boundaries of the family, and that there are some rules and conventions of behaviour in that outside world.