Temperament - Infants, Children and Adults

Infants, Children and Adults

Alexander Thomas, Stella Chess, Herbert G. Birch, Margaret Hertzig and Sam Korn began the classic New York Longitudinal study in the early 1950s regarding infant temperament (Thomas, Chess & Birch, 1968). The study focused on how temperamental qualities influence adjustment throughout life. Chess, Thomas et al. rated young infants on nine temperament characteristics each of which, by itself, or with connection to another, affects how well a child fits in at school, with their friends, and at home. Behaviors for each one of these traits are on a continuum. If a child leans towards the high or low end of the scale, it could be a cause for concern. The specific behaviors are: activity level, regularity of sleeping and eating patterns, initial reaction, adaptability, intensity of emotion, mood, distractibility, persistence and attention span, and sensory sensitivity. Redundancies between the categories have been found and a reduced list is normally used by psychologists today.

Jerome Kagan and his colleagues have concentrated empirical research on a temperamental category termed "reactivity." Four-month-old infants who became "motorically aroused and distressed" to presentations of novel stimuli were termed highly reactive. Those who remained "motorically relaxed and did not cry or fret to the same set of unfamiliar events" were termed low reactive. These high and low reactive infants were tested again at 14 and 21 months "in a variety of unfamiliar laboratory situations." Highly reactive infants were predominantly characterized by a profile of high fear to unfamiliar events, which Kagan termed inhibited. Contrastingly, low reactive children were minimally fearful to novel situations, and were characterized by an uninhibited profile (Kagan). However, when observed again at age 4.5, only a modest proportion of children maintained their expected profile due to mediating factors such as intervening family experiences. Those who remained highly inhibited or uninhibited after age 4.5 were at higher risk for developing anxiety and conduct disorders, respectively.

Kagan also used two additional classifications, one for infants who were inactive but cried frequently (distressed) and one for those who showed vigorous activity but little crying (aroused). Followed to age 14–17 years, these groups of children showed differing outcomes, including some differences in central nervous system activity. Teenagers who had been classed as high reactives when they were babies were more likely to be "subdued in unfamiliar situations, to report a dour mood and anxiety over the future, to be more religious."

Solomon Diamond described temperaments based upon characteristics found in the animal world: fearfulness, aggressiveness, affiliativeness, and impulsiveness. His work has been carried forward by Buss and Plomin, who developed two measures of temperament: The Colorado Child Temperament Inventory, which includes aspects of Thomas and Chess's schema, and the EAS Survey for Children.

H. Hill Goldsmith and Joseph Campos used emotional characteristics to define temperament, originally analyzing five emotional qualities: motor activity, anger, fearfulness, pleasure/joy, and interest/persistence, but later expanding to include other emotions. They developed several measures of temperament: Lab-TAB and TBAQ.

Other temperament systems include those based upon theories of adult temperament (e.g. Gray and Martin's Temperament Assessment Battery for Children), or adult personality (e.g.the Big Five personality traits).