David M. Marx, who received his doctorate in psychology from Harvard this past year and who appeared as a co-author with Ruggiero on both retracted articles, said that Harvard’s psychology department had asked Ruggiero’s former students not to comment on the matter.

Ruggiero’s requested retractions explicitly state that only she, and none of her co-authors, was responsible for the errors in the article.

Ruggiero left Harvard at the end of the 1999-2000 academic year to take a position as an assistant professor at the University of Texas at Austin.

She resigned from that position in Texas on June 22.

Michael Domjan, chair of the psychology department at the University of Texas at Austin, said that her letter of resignation did not state a reason for her decision to leave.

Ruggiero did not return phone messages left by The Crimson. She has also not responded to messages left by several other media outlets over the past week.

—Staff writer Daniel P. Mosteller can be reached at dmostell@fas.harvard.edu.