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.
JustMommies / Babies / Baby Development. Most babies start to walk around 13 months, but your baby may start walking as early as 9 or 10 months or as late as 15 or 16 months. Some babies go from cruising the furniture to walking rather quickly and other babies learn to walk at a little slower pace.tanding. Before your baby can walk, she needs to learn how to pull herself up to a standing position. Your baby may start pulling herself to a standing position when she is around 8-10 months. You can encourage her to stand by supporting her waist while she holds on to the sofa or other furniture.