Bella's brother, Noah, is a very intelligent little boy and also very talkative. He tended to talk for Bella and at other times he talked so much that Bella didn't get a chance to talk as much. This caused Bella's speech to be slightly delayed compared to her brother, so she didn't really start speaking until she was around nine months old. Some of his first words were Mema, no and goodbye. Bella's cognitive development in general was a little slower, and this showed in her ability to repeat, point, and play. She often compensated with her faster physical development, walking, climbing, and doing whatever she wanted. According to Biringen, Emde, Campos, and Appelbaum (1995), "walking infants also demonstrate increased 'will testing' in social interactions with their parents compared to crawling infants.".