Levels of analysis and explanatory progress in psychology: Integrating frameworks from biology and cognitive science for a more comprehensive science of the mind.

[Correction Notice: An Erratum for this article was reported online in Psychological Review on Mar 14 2024 (see record 2024-63968-001). Incorrect italic formatting was removed throughout the article, and an unnecessary paragraph of text was removed from the "Levels of Analysis and the Branches of Psychology: What Is Needed for a Complete Explanation of a Behavior or Cognitive System?" section. These were editorial production errors. All versions of this article have been corrected.] Levels of analysis are crucial to the progress of science. They frame the epistemological boundaries of a discipline, chart its explanatory goals, help scientists to avoid needless conflict, and highlight knowledge gaps. Two frameworks in particular, Tinbergen's four questions from biology and Marr's three levels from cognitive science, hold immense potential for psychology. This article proposes ways to integrate the two frameworks and suggests that doing so helps resolve key confusions and unnecessary conflicts in psychology. Integrating these two frameworks clarifies what "mechanism" really means, sheds light on how to test evolutionary hypotheses in psychology, and specifies what is required for a comprehensive explanation of a behavior or cognitive system. Adopting and integrating these two theoretical frameworks has the capacity to spur progress in psychology and to clarify what is needed for a comprehensive science of the mind. (PsycInfo Database Record (c) 2024 APA, all rights reserved).