As a researcher, Dr. Yuker focused primarily on attitudes toward and perceptions of individuals with disabilities.
Many perspectives are possible.
Data indicates that it is difficult to measure, change, and even to understand attitudes toward disabled persons. Even though these things are difficult, they must be done in order to improve the quality of life and status of persons with disabilities. In 1956, while doing research at the Human Resources Foundation, a division of Abilities Inc., he developed a research program focusing on attitudes toward disabled persons. He developed a measure of attitudes called the Attitudes Toward Disabled Persons Scale, which became the basis for future research and publications . The ATDP scale was first published in 1960, and an extended monograph based on the scale was published in 1966.