Final answer:
The examination of biological explanations for abnormal behavior by behavioral economists has provided insights into actions previously considered 'irrational'. These insights suggest complex biological reasons behind such behaviors, challenging the traditional dichotomy of rationality and supporting a more nuanced understanding of human psychology.
Step-by-step explanation:
The interest in biological explanations for abnormal behavior has indeed varied over time, a phenomenon that illustrates the dynamic nature of psychological research and its interplay with social values. Behavioral economists, in particular, have made significant contributions to our understanding of behaviors once deemed irrational by providing insight into the systematic patterns of such actions. Through their research, they suggest that what might be labeled 'irrational' could actually be indicative of complex, underlying biological and psychological processes.
This approach has been critical in navigating the dichotomy between biological facts and social values as outlined by Wakefield (1992) in the context of defining mental disorder. Studies such as those mentioned by Waller (2009a, 2009b) regarding historical incidents of mass psychological phenomena also provide compelling cases for reassessing our understanding of human behavior in both historical and modern contexts. Moreover, in current times marked as 'abnormal' due to unprecedented human impact, it is increasingly important to reassess our notions of behavior within a broader environmental and biological framework.