Definitions and Developmental Processes in Research on Infant Morality.

Key terms in research on moral development also exist in everyday language. Tafreshi and her colleagues (2014) propose that researchers should use terms in ways consistent with their usage by non-researchers. This commentary questions this claim, and argues for the importance of providing clear and explicit definitions of terms such as "morality" and "innate," of showing caution when attributing evaluations and judgments to infants, and of considering developmental processes preceding and succeeding the abilities demonstrated using looking-time and related measures. Progress is unlikely to result from conceptual analysis alone. However, conceptual clarity will make it easier to see what theories agree and disagree about as well as how opposing claims can be tested empirically.