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.
1. Begin in Utero. There are a number of benchmarks in your babyâs road to talking. Those exposed to more than one language will often hit these benchmarks around the same time for each language. Many believe the first steps to talking begin in utero. During this time your child will get used to the sound of your voice and begin to pick out their motherâs voice amongst others. 2. Cry During the Time from Birth to about 3 Months. From the time babies are born until they are around three months old, crying is their main form of communication.