Is the design sound? Is sequence of photos a confound? If so, how would you control for its effects on the study? Is experimenter a confound? If so, how would you correct it in order to make the study methodologically sound? As part of a class research project, a group of three student-researchers (Ed, Ted, and Fred) decide to study the effects of physical attractiveness on ratings of success. Participants look at a set of five photos of highly attractive people, then five more photos of moderately attractive people. Finally, they see photos of five unattractive people. Previous research identified appropriate photos for each condition. To get a good cross-section of students, the researchers decide to test three types of students: psychology majors, business majors, and chemistry majors. By a random process, it is determined that the psychology majors will be tested by Ed, that Ted will test the business majors, and that Fred will test the chemistry majors

answer; self_ disclosure;

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.

its tr3way you already know

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.