Two Daniel Katz's

I found this while googling boredly at work today. Click the title above for the full page.

"There appear to have been two men named Daniel Katz who are significant figures in the history of psychology. One of them (July 18, 1903 - Feb. 28, 1998) was important in social psychology. But I don't know anything about the other Daniel
Katz (Oct. 1, 1884 - Feb 2, 1953). Can anyone share information about the earlier Daniel Katz? Does anyone know the middle name or initial of either? "