Dr. Toris wants to test an incentive program designed to increase attendance in her classes. For the first 8 weeks of the semester, she does not use the program and records attendance rates each week. Then she institutes the incentive program for the last 8 weeks and continues to record attendance rates each week. She detects an increase in attendance over the last 8 weeks. This is an example of which experimental design? Group of answer choices one group pretest-posttest interrupted time series non-equivalent control group multiple baseline

In some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. the production of sterile male ligers is an example of read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. the production of sterile male ligers is an example of a postzygotic barrier the founder effect sympatric speciation a prezygotic barrier

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