With an emphasis on the problems of control of extraneous variables and threats to internal and external validity, the arrangement or design of experiments is discussed. The purpose of experimentation in an educational institution, and the principles governing true experimentation (randomization, replication, and control) are presented, as are…

This project was conducted to refine and expand previous research indicating the need for an instrument counselors can use in working with area secondary schools and potential students to assess their progress in making career and training decisions. Instruments developed during this research process were pilot tested at two area schools and…