The purpose of this research is to examine the causal relationships between an infant's negative
emotionality, the mother's reactive parenting, and the infant's problem-solving ability. This research
used a Panel Study with Korean Children's 1st-3rd year data, and the subjects were 1789 infants
and their mothers. To process the results, descriptive statistics, reliability verification, Pearson's
product moment correlation analysis, and path analysis were conducted. The results of this research
are as follows: First, the infant's negative emotionality had significant negative effects on the
mother's reactive parenting. Second, the mother's reactive parenting had significant positive effects
on the infant's problem-solving ability. Third, the infant's negative emotionality had indirect effects
on the problem-solving ability. Through the results of this research, it could be interpreted that the
path, the infant's negative emotionality, which is a personal factor, and the mother's reactive
parenting, which is an environmental factor, had effects on the infant's problem solving ability.
Furthermore, basic data to explore the ways of promoting the infant's problem solving ability could
be introduced.