Dr. mateo believes that every child is born a "blank slate." children's early environments shape their personalities, though the children may be continually affected by their environments as they grow. everything comes down to a simple principle in dr. mateo's mind: if our behaviors are followed by satisfying consequences, we will repeat them, and if the consequences are unsatisfying, we won't repeat them. dr. mateo is probably a therapist. a) psychodynamicb) behavioralc) cognitived) humanistic