A 6 years old child with development delay, can ride a tricycle, can climb upstairs with alternate feet, but downstairs with 2 feet per step, can tell his name, known his own sex, but cannot narrate a story. What is his development age?

Milestones at 2-4 yrs of age: Age Gross motor Fine motor Language 24 months Walks up and downstairs (2 feet/step) Jumps Tower of 6 blocks Draws veical and circular stroke Turn pages of a book, one at a time Puts 3 words together (subject, verb, object) 36 months Rides a tricycle, can steer and pedal Alternate feet going upstairs Can build a tower with 9 blocks Can copy circle Can dress and undress fully Knows full name,age and sex 48 months Hopes on one foot Alternate feet going Downstairs Throws ball overhand Copies cross Tells story So the child in the question though has chronological age of 6 years, but his developmental milestones are that of a 3 year old child. Hence, his Developmental age is 3 years Extra Edge: Developmental Quotient (DQ) = Developmental age/ Chronological age * 100 = 3 yr. / 6 yr. * 100 = 50