As you are asking about your 7 years old daughter. Autism is a spectrum disorder, which means that people can experience a wide range of symptoms and of varying severities. For example, a person with autism who is towards the high functioning range of the spectrum will have a good grasp of language, but a person towards the low functioning range of the spectrum may not speak at all.
As such, it is important to note that a person with autism spectrum disorder will not display all symptoms and symptoms will vary in severity. However, a person with ASD will display several of these behaviors and signs. Such as Common signs of autism are Difficulty interpreting different emotions in others, Not seeming attached to parents, Lacking interest in playing social games or the company of other children, Interest in playing with one particular toy or object,
Echolalia, repeating other people’s words or phrases, Repeating own words over and over, Using formal language and expressions, rather than the slang of their peers, Not developing language skills at all, Difficulty toilet training, Having tantrums or meltdowns, Physically aggressive behaviour, Challenging behaviour, such as banging head on wall or picking at skin, Engages in behavior such as flapping hands, rocking or twirling
If you feel these symptoms in your daughter then test your daughter to a psychologist. Thanks,