Study: How Do Four-Year-Old Children Learn & Think? Parents with four-year-old children invited to participate in research study. Read More Trying TogetherOctober 7, 2019PPEL, Parents Promoting Early Learning, University of Pittsburgh, PITT, study, research study, research, parents, caregivers, four-year-old, 4 year old, interactions, school readiness, assessment, development, learning, Allegheny County, Allegheny County Department of Human Services, Trying Together, The Alliance for Infants and Toddlers