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Date Created: 11/14/15
Week Eight Homework Exercise 1 PSYCH610 Version 1 University of Phoenix Material Week Eight Homework Exercise Answer the following questions covering material from Ch 14 of Methods in Behavioral Research 1 What is replication and what role does it play in increasing the external validity or generalizability of a study In what way is the IRB involved in using participants in a research study Replication is described as or defined as copying something Replication in research studies provides a safeguard against limited generalizability Replication is often used to identify the generalizability to a variety of different groups This also helps determine not only reliability but also validity as well The IRB is involved in using participants in a research study by protecting the rights and also welfare of the individuals involved Cozby 2009 What are the advantages and disadvantages of using college students as participants in research studies The advantages of using college students is because they are able to help expand the research on social psychology as well as experimental psychology The disadvantages however are that college does cause a restriction to the population the groups may not fit into the experiment Cozby 2009 What potential problems can arise from generalization of results to different cultures or ethnic groups Generalization can cause problems with external validity and can also create bias perspectives But with the increase in diversity among different cultures this has caused an improvement to validity Cozby 2009 4 What is metaanalysis and how is it useful to practitioners and scholars Metaanalysis is when the researcher combines the actual results from multiple Week Eight Homework Exercise 2 PSYCH610 Version 1 studies The analysis consists of a set of statistical procedures that employ effect sizes to compare a given finding across many different studies This then allows the practioners and scholars to make statistical conclusions Cozby 2009 True or false In many cases meta analyses involves calculating an average effect size for a relationship between variables False because you do not need to calculate an average effect size for the relationship between variables Metaanalysis shows the effect size and analysis comparisons Cozby 2009 True or false Many constructs such as physical attractiveness and selfesteem appear constant across cultures thus external validity is less of a concern when conducting research on such constructs Provide a brief explanation of your answer False physical attractiveness vary across cultures It may be that in one culture sexual maturity may appear more attractive but in another culture sexual attractiveness may not be influential Cozby 2009 Summarize the main points of the course emphasizing the importance of research to the psychology profession Psychological research helps us to understand certain aspects which allow us to live better lives Because of research we are able to understand the different types of programs that will help our children succeed in school We also have a better understanding of the programs that are available to us as a society in order to live a healthier life If there was no research that even existed then we would not understand the things that we do now We would not know all of the different programs that are available to us because there would be no programs Cozby 2009 Week Eight Homework Exercise 3 PSYCH610 Version 1 Week Eight Homework Exercise 4 PSYCH610 Version 1 References Cozby P 2009 Methods in Behavioral Research New York NY McGraWHill
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