Dr. bonne demuth wanted to find out if a memory-enhancing drug would decrease the time it takes students to learn how to trace a maze. she predicted that the students who received the memory-enhancing drug in the experiment would trace the maze more quickly than the students who did not receive the drug. she selected 20 students at random from the jjc student population and had her lab assistant randomly select and inject 10 of the students with the memory-enhancing drug and the other 10 students with a shot of an inactive solution (a placebo). dr. bonne demuth was not informed which group of students was the group receiving the drug and which group of students was the group receiving the placebo shots, and the students did not know which group they were in until after the experiment had been completed. after the students were injected, dr. bonne demuth tested each group of students on the maze, testing one student at a time and timing how long it took each student to learn how to correctly trace the maze. she gave each student 5 opportunities to trace the maze, and then calculated the average time it took each student, as well as the average time for each group of students overall. besides the difference in what the shots contained (the memory-enhancing drug or the placebo solution), both groups of students were treated exactly the same during the experiment. what is the independent variable in this study?

The independient variable in this study is the memory-enhancing drug that Dr. Bonne DeMuth is testing on the students.

Explanation:

In research studies, there are independent variables which are those that are being studied and analyzed. When these variables are intervened, these will be the ones that will directly affect the results.

So , in this case Dr Bonne DeMuth is trying to find out if a memory-enhancing drug would help decrease the time it takes students to learn how to trace a maze.The independent variable in this case would be the drug analyzed  by Dr Bonne DeMuth and the intervention that is being carried out on this variable is to know if it can achieve the desired effect(decrease the time it takes students to learn how to trace a maze).

answer; /// i believe the correct answer is (analogue);

1. cold turkey (no outside ). about 90% of people who try to quit smoking do it without outside support -- no aids, therapy, or medicine. although most people try to quit this way, it's not the most successful method. only about 5% to 7% are able to quit on their own.

2. behavioral therapy. this involves working with a counselor to find ways not to smoke. together, you'll find your triggers (such as emotions or situations that make you want to smoke) and make a plan to get through the cravings.

3. nicotine replacement therapy. there are several types, including nicotine gum, patches, inhalers, sprays, and lozenges. they work by giving you nicotine without the use of tobacco. you may be more likely to quit with nicotine replacement therapy, but it works best when you use it with behavioral therapy and lots of support from friends and family. and remember that the goal is to end your addiction to nicotine, not simply to quit using tobacco.

explanation:

mark brainliest