An experimental group is the group in an experiment that receives the variable being tested. One variable is tested at a time. The experimental group is compared to a control group, which does not receive the test variable. In this way, experimental groups are used to find answers in an experiment.
1 At around 9 months of age, babies begin to pull themselves up to a standing position. 2  By 10 months of age, a baby should be able to grasp objects with thumb and forefinger.
Typically, babies may be able to start really talking around 10  months of age. By really talking I mean the ability to say words  that are audible enough for any one to und â¦ erstand. Babbling can  occur earlier then 10 months, but generally sounds like the baby's  attempt to copy the people around them. ----   Well, it's a fact that every child grows up in it's own individual way. Babies, don't really talk for a while. They usually start to babble first, trying to say something.   Babies usually start around at 10 months of age.