Question

1. Ifa study includes random assignment but not a control group, the design may still be considered to be a true experimental design. True a. b. False Using control groups help account for which of the following threats to internal validity except? 2. History a. b. Testing Maturation c. None of the above d. If the results of a study determine that an intervention did not work, though for reasons not related to the intervention, the 3. study would have questionable Internal validity b. External validity a. C. Generalizability 4 Which of the following study designs is considered the strongest and most desirable? a. Experimental b. Quasi-experimental Non-experimental C. d. Pre-experimental 5. By definition, a factorial design: Has two or more dependent variables a. b. Has two or more independent variables Has one independent variable and two or more dependent variables c. Has one independent variables with multiple levels d. 6. Guido is interested in documenting whether a particular three month advertisement campaign increases community awareness of sexually transmitted diseases. He surveys 200 randomly selected community residents before and after the advertisement campaign. Regardless of the outcome, which are plausible alternative reasons (internal validity threat) for a change in scores between the pre and post tests? History a. b. Testing All of the above c.

Answer 1

1.false. the reasearch is done in random assignment can be considered as qyasiexperimental design.

2.C.maturation.history and testing is vital to to control group studies.

3.A.internal validity of study can be questioned in such situations.

4.A.in experimental studies people study intervention and out comes.so it is intresting.

5.A.it has two or more elements which depend on each others value.

6.C.all of the above.