The New York Longitudinal Study of Temperament found that

A) almost all children fit into a clear temperamental category.
B) about one child in three has a mixed temperament pattern.
C) children are fairly evenly distributed among the basic temperamental categories.
D) the largest temperamental group is slow-to-warm-up.

New York Longitudinal Study

A research project that began in the 1950s tracking the temperamental characteristics of infants and how these traits relate to personality development.

Temperamental Category

A classification in psychology that describes inherent personality traits and behavior tendencies that are observable in infancy and assumed to be biologically based.

Mixed Temperament

A combination of multiple temperament traits in an individual, showing behavioral characteristics that are not dominated by a single temperament type.