Janet Ruth Falon is a creative writing teacher and the author of The Jewish Journaling Book: How to Use Jewish Tradition to Write Your Life and Explore Your Soul.

Celia Rothenberg is an assistant professor of religious studies at McMaster University in Hamilton, Ontario, Canada. She contributed an article on three forms of Jewish yoga practiced in North America to the November 2006 edition of the journal Nova Religio.

P. Aneesah Nadir is founder of Dr. Aneesah Nadir and Associates and a retired professor of social work at Arizona State University in Tempe.

The Calvin Institute of Christian Worship is an organization based in Grand Rapids, Mich., dedicated to promoting Christian scholarship. Its online resources include information about the practice of fixed-hour prayer and about disability within faith communities.

Ira Sheskin is a specialist in Jewish demographics at the University of Miami, where he is a fellow at the Sue and Leonard Miller Center for Contemporary Judaic Studies. Sheskin was a consultant on the NJPS study.

Eliezer Segal is a professor of religious studies at the University of Calgary. He has a Web page explaining the “Varieties of Orthodox Judaism.” The page sets out the many branches of the movement.

Norma Baumel Joseph is an associate professor of religion at Concordia University in Montreal. She writes about the experience of women in Orthodox Judaism.

Tamar Ross is a professor of Jewish philosophy at Bar-Ilan University in Ramat Gan, Israel. She writes about Orthodoxy and feminism.

Daniel Frank is director of the Judaic studies program at Purdue University in West Lafayette, Ind.