Complex sentence: She started administering them in September 1972 and Genie strenuously resisted them for the next year, often refusing to respond all or clearly guessing, but Curtiss was able to extract some useful data from these early tests and from her observations of Genie outside in other settings.
Split into simpler sentences: She started administering them in September 1972, and Genie strenuously resisted them for the next year. Nevertheless, Curtiss was able to extract some useful data from these early tests and from her observations of Genie outside in other settings.