Numerous studies, such as those described below, have been conducted over the years in an attempt to explain and examine the emergence of self-recognition in children. Consequently, the general consensus is that 15-month-olds and most 24-month-olds are capable of responding to their own image in a mirror (Anderson, 2005). Research has also shown that there are various self-conscious and self-labeling reactions that also indicate that the child has self-recognition during the second year, although further research is needed to test its validity (Anderson, 2005). Keller et al. (2005) conducted a study to examine the development of self-concept within a cultural context. The study looked at children aged 18 to 20 months from two different contexts; German middle class families and Cameroonian Nso farmers. The results of the study concluded that German children were able to recognize themselves more often than Nso children. Keller et al. (2005) believed this was caused by behavioral rates, parenting strategies, and child developmental outcomes. Researchers have defined the level of contingent reactivity as the mechanism responsible for self-recognition in the mirror (Keller et al., 2005). Another result of the study showed that Nso children generally showed lower behavior than German children while in front of the mirror (Keller et al., 2005). 60% of the Nso children simply sat in front of the mirror, while the German children tried to involve the mirror reflection in the game (Keller et al., 2005). Bertenthal and Fischer (1978) conducted a study with the intention of looking at the five-stage developmental sequences of self-recognition behaviors in children between the ages of 6 and 24 months...... half of the paper.... ..04. doi:10.1080/01650250500147485Mans, L., Cicchetti, D., & Sroufe, L. (1978). Mirror reactions of infants and young children with Down syndrome: Cognitive bases of self-recognition. Child Development, 49(4), 1247-1250. doi:10.2307/1128771Mitchell, R.W. (1992). Developing concepts in childhood: Animals, self-perception, and two theories of self-recognition in the mirror. Psychological Inquiry, 3(2), 127-130. doi:10.1207/s15327965pli0302_9Nielsen, M., & Dissanayake, C. (2004). Pretend play, self-recognition in the mirror, and imitation: A longitudinal investigation during the second year. Child Behavior and Development, 27(3), 342-365. doi:10.1016/j.infbeh.2003.12.006Vyt, A. (2001). Visual self-recognition processes in newborns: experimental induction of "mirror" experiences via video presentation of the self-image. Infant and Child Development, 10(4), 173-187. doi:10.1002/icd.277