A study that tracks the same group of people over time is called a(n) __________ study

This 19th century pioneer is credited with recognizing that mental retardation was related to developmental deficiencies rather than mental illness.

a. Edouard Seguin b. Charles spearman c. Jean Esquirol d. Arthur Otis

Asthenia is characerized by

A. slurred speech B. inability to make rapid movements like finger tapping C. fatigue in skeletal muscles after minor physical activity D. quivering movements