Original sentence: Unlike Maslow, who offered little data to support his ideas, Herzberg and others have presented considerable empirical evidence to confirm the motivation-hygiene theory, although their work has been criticized on methodological grounds
Edited sentence: Nevertheless, Herzberg and his associates have rendered a valuable service to science and to management through their efforts to apply scientific methods to understanding complex motivational problems at work and have stimulated others to continue the search.Their work, however, has been criticized on methodological grounds.Unlike Maslow, who offered little data to support his ideas, Herzberg and others have presented considerable empirical evidence to confirm the motivation-hygiene theory