One factor that may make it difficult to interpret the result of even a true experiment in a natural setting is contamination (when there is communication of information about the experiment between groups of participants). Briefly describe the three types of problems that can result from contamination.
What will be an ideal response?
Contamination can result in resentment on the part of participants receiving less desirable treatments (such that their performance decreases because of resentment), rivalry among participants receiving different treatments (e.g., control group participants enhance their performance so as not to look bad), or a general diffusion of treatments across the groups (e.g., control group learn about a treatment and apply the treatment to themselves, thus eliminating group differences).
You might also like to view...
__________are those in which people attribute the death to an immoral, illegal, or evil cause.
A. Stigmatized deaths B. Acknowledged deaths C. Slow deaths D. Sudden deaths
An experimenter hires you as a research project coordinator
Your role is to randomize the participants to groups, create a code list identifying which participants receive which treatment, and conceal materials so that the research assistants, experimenter, and participants are unaware of which treatment is administered to which group. You are coordinating a ________ study. a) double-blin b) cross-cultural c) single-blind d) qualitative
In a 2 × 3 analysis of variance, the number of null hypotheses is
A) 1 B) 2 C) 3 D) 6
Who among the following is most likely to have obsessive-compulsive disorder?
A. Darya who constantly worries about meeting her parents' expectations B. Andre who shows reluctance to go to school C. Leah who wears gloves all the time as she is excessively concerned about hygiene D. Ali who bullies other children, gets into fights, and shows blatant disregard for authority