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.
At age five, children should correctly name at least four colors. For a child with a language impairment, this can be even trickier and ultimately delayed. Try focusing instruction to teach a child colors with these ten activities. Color instruction should: Begin with matching like colored items.