Pseudo-retardation would be something that resembles or looks like retardation, but actually isn't. The term literally means, fake retardation.
No a dimple is not a sign of retardation.
Retardation = change in vel / time taken
The SI unit of retardation is meter per second squared or m/s^2.
Overstudy does not cause mental retardation.
Retardation - 2015 was released on: USA: 2015
The first spelling is correct: "Retardation."
Mental retardation has different levels. There is Mild intellectual disability; moderate intellectual disability; severe intellectual disability; and Profound intellectual disability.https://www.floridahospital.com/mental-retardation-mr/symptoms-and-signs-mental-retardation
TThere are quite high as it comes in different types of mental retardation.
Yes, a vector can be represented in terms of a unit vector which is in the same direction as the vector. it will be the unit vector in the direction of the vector times the magnitude of the vector.
literature review on mental retardation with reference
Exposure to lead can also cause mental retardation.