In the 1940s and 1950s considerable behavior genetic research with both animals and human subjects was carried on by psychologists and biologists. Recognition of Behavior Genetics as a designated discipline might be said to begin with Fuller and Thompson's Behavior Genetics published in 1960. Scientists as a group are curious regarding relationships between phenomena, and behavioral geneticists are no exception. Regardless of immediate economic application, they study genetic and environmental factors that affect behavior. Psychology’s contribution to behavior genetics includes research methodology, measuring instruments, and other technologies used by researchers. A broad sampling of current introductory texts indicates quite clearly that most of them show a rather reasonable and balanced picture of the topics of behavior genetics, with at least one current book presenting a most accurate and sophisticated incorporation of several issues and findings of behavior genetics with other subject matter.