Question

. propose a between-subjects experimental design to test the relationship. The IV and DV are already identified for you. Please explain how you would investigate the relationship by including: (1) your hypothesis (.e., what do you expect to happen), (2) an operational definition for your dependent variable (i.e., how will you test the variable), (3) the population (who do you want to recruit and why), (4) the levels of the IV (how many, what they are, and why), and (5) your study procedures (i.e., what you expect your participants to do during your study). Propose a between-subjects design based on one of the relationships posted below Relationships: 1. The effect of nicotine (IV) on recall (DV).

Answer 1

A between-groups design consists of the different treatment/intervention groups where each group consists of the different participants. Following is a between-groups research design:

Hypothesis: People who use nicotine, perform poorly on a recall test. It means the scores on the recall test will be lower for people who are using nicotine as compared to the people who are not using the nicotine.

Experimental design: There are two groups - experimental and control. The experimental group consists of the people who use nicotine in the form of various tobacco products while the control group consists of the people who do not use nicotine in any form. Further, both the groups are sub-divided on the basis of the form of nicotine they are using. For example, smokeless nicotine and nicotine with smoke.

Operational definition: The more people use nicotine more they will find problems in free recall and thus, they will perform poorly on the test of recall. The independent variable (IV) is the use of nicotine while the dependent variable is the scores on the test of recall.

Population: Population will be the general people of Redwood City, California, USA while the sample will comprise all the people in age range of 20 to 60 years old, a total of 400 participants from the city.

Levels of IV: There are two levels of the IV, one is the nicotine use with smoke and another is the nicotine use without smoke.

Procedure: There are broadly two groups, control, and experimental. But both the groups are classified into two sub-categories - people who use smoking nicotine and people who use smokeless nicotine. An independent measure t-test will be used to examine the significant difference between the scores on the recall test for the experimental group and scores on the recall test for the control group. If there will be a significant difference, then it will be concluded that nicotine has an effect on the recall. If there will not be a significant difference, then it will be concluded that nicotine has not an effect on the recall.