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Hallam, Price, and Katsarou (2002) investigated the influence of background noise on classroom performance for children aged 10 to 12. In a similar study, students in one classroom worked on an arithmetic task with calming music in the background. Students in a second classroom heard ...
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A researcher investigated different combinations of temperature and humidity to examine how heat affects performance. The researcher compared three temperature conditions (70º, 80º, and 90º) with a high humidity and a low humidity condition for each temperature. A separate group of...
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There is some evidence indicating that people with visible tattoos are viewed more negatively than people without visible tattoos (Resenhoeft, Villa, & Wiseman, 2008). In a similar study, a researcher showed male college students photographs of women and asked the students to rate the...
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Childhood participation in sports, cultural groups, and youth groups appears to be related to improved self-esteem for adolescents (McGee, Williams, Howden-Chapman, Martin, & Kawachi, 2006). In a representative study, a researcher compares scores on a standardized self-esteem question...
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To examine the relationship between texting and driving skill, a researcher uses orange cones to set up a driving circuit in the high school parking lot. A group of students is then tested on the circuit, once while receiving and sending text messages and once without texting. For eac...
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To examine the relationship between alcohol consumption and birth weight, a researcher selects a sample of n = 20 pregnant rats and mixes alcohol with their food for 2 weeks before the pups are born. One newborn pup is randomly selected from each subject's litter and the average birth...
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Last fall, the college introduced a peer-mentor program in which a sample of n = 75 freshmen was each assigned an upperclassman mentor. To evaluate the success of the program, the administration looked at the number of students who returned to the college to begin their second year. T...
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Ford and Torok (2008) found that motivational signs were effective in increasing physical activity on a college campus. In a similar study, researchers first counted the number of students and faculty who used the stairs and the number who used the elevators in a college building duri...
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Ryan and Hemmes (2005) examined how homework assignments are related to learning.The participants were college students enrolled in a class with weekly homework assignments and quizzes. For some weeks, the homework was required and counted toward the student's grade. Other weeks, the ...
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To examine the effect of sleep deprivation on motorskills performance, a sample of n = 10 participants was tested on a motor-skills task after 24 hours of sleep deprivation, tested again after 36 hours, and tested once more after 48 hours. The dependent variable is the number of error...

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