Complex sentence: In her time at John Hopkins, her and Watson studied over 500 children, with the "Little Albert" study being their most famous psychological experiment, which in today's time, would be deemed highly unethical.
Split into simpler sentences: In her time at John Hopkins, her and Watson studied over 500 children, with the "Little Albert" study being their most famous psychological experiment. In today's time, the "Little Albert" study would be deemed highly unethical.