Parent-child interactions and characteristics of mothers' child-directed language have been related to children's linguistic development. Studies on parent-child interactions in Turkey have generally focused on children. There have not been many researches on Turkish motherese. This study addresses this gap by exploring the properties of Turkish maternal language input within the framework of Bloom's Taxonomy of Cognitive Domain (1956). Bloom identified six levels in a hierarchical framework, from simple to more complex. Since children are expected to think at the higher levels of this taxonomy when they enter school, it is important to be introduced with the higher levels during the preschool years. Turkish mothers differing in socioeconomic status (SES) and their preschool children were taped in their homes in the context of toy play. To this end, this study tries to explore what, if any, differences are found between high SES and low SES mothers' utterances in terms of the levels of the Cognitive Domain. The results showed that high SES mothers produced more utterances at higher levels, thus, high SES children were encouraged more by their mothers to think at higher cognitive levels before they start formal schooling.