Dr. unruh believes that heredity is primarily responsible for personality traits. dr. brand believes that environmental influences are primarily responsible for personality traits. one might say that dr. unruh and dr. brand are on different sides of the debate.

Maturation versus learning.

Explanation:

Maturation may be defined as a type of developmental process that constitutes for the species specific behavior. Learning perspective mainly based on activity and experience of an individual.

Dr. Unruh believe that hereditary factors are responsible for the traits. He believed on maturation process as maturation believes that traits are generally determined by hereditary factors.  According to Dr. Brand, environment influence the traits of an individual. H e believes on learning perspective as learning explains that hereditary has little role on traits and mostly influence by the environment. Both the doctors are on the maturation versus learning traits.

Thus, the answer is maturation versus learning.