किशोरावस्था (Adolescence) की विकासात्मक अवस्था आमतौर पर किस आयु वर्ग द्वारा पहचानी जाती है?

According to psychologists like Ernest Jones, which stage of human development is known as the 'pseudo-maturity' stage?

To which developmental stage is emotional-functional play primarily related?

The development of a child starts from which stage?