The project was originated by Dr. Bruce E. Wexler, professor emeritus of psychiatry at the Yale School of Medicine, who co-founded an organization to promote Israeli-Palestinian cooperation.

In a response to the Israeli Ministry of Education, the three professors cited the rigorous research methods employed and wrote of their hopes that the ministries on both sides would “be moved to prepare a plan of action” to help “advance the peace building process.”

Dr. Wexler added that all the advisory panel members were familiar with the report’s main findings.

Unimpressed with the quality of previous, more subjective studies, Dr. Wexler said that he had insisted on applying scientific research methods for this one, so as “to provide real facts about a controversial issue.”

This included employing research assistants from both sides who were fluent in Hebrew and Arabic and data entered remotely into a database at Yale, similar to a blind study.

The study examined books from Israel’s state secular and religious systems as well as those used in independent ultra-Orthodox schools, books issued by the Palestinian Authority Ministry of Education and used in the West Bank and Gaza, and a small number used in the few independent Islamic Trust schools. It did not include religious scriptures.

Previous studies of Palestinian textbooks by monitoring groups like the Institute for Monitoring Peace and Cultural Tolerance in School Education and Palestinian Media Watch suggested that they promoted the widespread dehumanization of Jews and Israel and a rejection of Israel’s right to exist.

The new study avoids harsh language and couches the bad news in a kind of symmetry.

It found that extreme examples of dehumanization and demonization were “very rare” on both sides. The few examples given included one from an ultra-Orthodox textbook describing an Israeli settlement established on the ruins of an Arab village that “had always been a nest of murderers.” A Palestinian language textbook included a reference to “the slaughterhouse,” explaining it as the nickname prisoners had given to an interrogation center “due to the brutality of the interrogators.”