The precocious youngster is being compared to Albert Einstein, Bill Gates and Stephen Hawking and has already become a member of Mensa.
The psychologist who tested Sherwyn, from Barnsley, South Yorkshire, said his score – the highest possible on the Wechsler Scale – showed he has a ‘very superior level of intelligence’.
His IQ score is the latest in a long line of grand achievements by Sherwyn, who joined Mensa when he was three years old.
He spoke his first words at ten months, was talking in full sentences at 20 months, and has been wowing his parents, teachers and doctors ever since.
Now, Sherwyn has a mental age of eight years and nine months – more than twice his actual age – and is studying at that level.
Educational psychologist Dr Peter Congdon said: ‘Sherwyn has a very superior level of intelligence, he is incredibly gifted and his vocabulary is out of this world.
‘His intellect reaches the highest possible levels of reason and when he talks to you he has the social skills of a much older child.’
He added: ‘It is very unusual for a child to have this type of intelligence, he came out at the very top on the tests.
‘I specialise in specially gifted children but when I tested Sherwyn I knew I had come across something very special.’
While most four-year-olds have not yet started school, Sherwyn is already studying work for eight and nine-year-olds at Rastrick Independent School, Huddersfield.
Sherwyn’s mother, Amanda Sarabi, 37, a former teacher, said: ‘He is a very happy healthy child and loves to talk.
‘He questions everything and I have been doing my best to answer his questions to the best of my knowledge.’
She added: ‘His general knowledge is amazing for a four-year-old – I think it’s because of all the questions he asks all day long.’
Sherwyn, who is an only child, has read more than 940 books and, according to his mother, ‘his favourite is the encyclopaedia as he loves learning new things.’
Mrs Sarabi, a former teacher, has given up work to care for her construction worker husband, Daroud, 37, as he recovers from a serious car accident.
So we got another Einstein.
Its Parker baby