Reliability and validity of rouge test

The rogue test is used for the sense of self, to determine whether we are born with it or if it develops over time. The purpose for which it has been used by psychologists is to looks at the developmental aspects of the sense of self. Researchers put infants in front of a mirror after putting a red dot on their nose. They discovered that infants 18 months and over had a sense of self, as they touched the red dot on their nose and so recognized that it was them in front of the mirror. Infants younger than 18 months did not touch the red dot, thus they were viewed as not having a sense of self. For the test to be reliable, it would mean that the results would be consistent, infants 18 months and over would touch the red dots and infants younger than 18 months would not. For the test to be valid, it would mean that it was accurate, measuring what it is intending to measure. In this case that is the sense of self. The problems with the validity may be that the red dot is not necessarily measuring a sense of self as researchers assume that the infant touching the dot is an indicator of the sense of self and instead the test may be measuring how infants interact with mirrors or not be sensitive enough. The problem with reliability may be that when researchers in different parts of a country or different parts of the world replicate the rouge test they may not come to the same results.