A behavioral neuroscientist is testing the effects of adrenaline on memory using a group of 12 rats. The researcher is unsure about how much adrenaline might produce an effect on memory. One group of rats will be injected with placebo saline (0 micrograms of adrenaline). The other group will be injected with a dose of adrenaline. When deciding between a 2-microgram dose or an 8-microgram dose (both of which are safe), the researcher opts to use the 8-microgram dose.
1. The researcher has:A. exaggerated the difference between the levels of her independent variable, thereby increasing her power. B. given the rats an overdose of adrenaline. C. made a Type II error. D. exaggerated the difference between the levels of her independent variable, thereby decreasing her power.