Examination of such journals as Ethology and Sociobiology, renamed Evolution and Human Behavior in 1997, reveals that evolutionary psychology is progressing as a science due to improved hypothesis testing. Investigators make more imaginative uses of evolutionary theory and selection models to generate testable hypotheses. There are standard instruments to measure variables and parameters relevant to hypotheses. More extensive and detailed bodies of evidence have been developed to test hypotheses. A host of narrowly focused studies achieve statistically significant and replicable results that support evolutionary predictions. More powerful interpretive techniques connect local findings to cross-cultural and cross-species data. Conclusions are stated with greater caution.