Question Bank [2022] — Psychology STD 12 Commerce / Arts — Question

1. The concept of Intelligence Quotient (I.Q.) was introduced by German psychologist William Stern in 1912.

2. Stern computed I.Q. as a ratio of Mental Age (M.A.) to Chronological Age (C.A.). This formula is given as:

(I. Q. $)=\frac{\text { Mental Age (M. A.) }}{\text { Chronological Age(C.A.) }}$

3. Later, Terman refined the formula of I.Q. by multiplying the ratio of M.A. and C.A. by 100. This formula is given as:

(I. Q. $)=\frac{\text { Mental Age (M. A.) }}{\text { Chronological Age(C.A.) }} \times 100$