review Flashcards
amy reports that her cell phone gets better service than nicoles. in reality, there is no differnece in cell phone service between the two. in this case, Amy’s claim illistruates a _______________error.
type 1
Researchers studying the effectiveness of a diet on heart disease divided the study’s participants into two groups: those with type A personalities and those with type B personalities. which scale of measurement best characterizes these personality variables?
nominal scale
a school administrator wants to examine the effect of student lockers on class tardiness. they compare tardiness recorsd of a school with no lockers to a school with lockers. what type of research design is this?
nonequivelant control scale
in assessing the relationship between variable x and variable y, the squared value of the correlation coefficient (r^2) is sometimes reported. the value representes:
percent of variance in y that van be accounted for by x.
a marketing company wants to determine which cola beverage is most preferred by consumers. a group of participants tastes cola A and then rates the taste. the group then tastes cola B and rates the taste for this cola. A second group of participants follow the same procedure; however, they first taste Cola b and then Cola A. This is an exmaple of what type of design?
2x2 mixed factorial
Dr. Parker finds that judgement of responsibilty for a car accident are greater for older drivers if the outcome is severe rather than mild. However, for younger drivers, ratings are the same irrespective of the outcome. These findings suggest__________
an interaction between age and outcome
Dr, Afzal finds tat students who study more than 10 hours a week have significantly higher test scores than students who study fewer than 10 hours a week. In order to determine the magnitude of the effect of study hours on test scores, he should calculate an estimate of the ______________
effect size
a researcher assesses participants attitude towards weed, presents them with a persuasive seminar in favoring legalization and then reassess their attitude towards the drug. However, between assessment 1 and 2, the president also advocates for legalization. if the researcher does not use a control group, andy differences observed might be caused by _________________
history effects
in context of reversak designs, the ABAB design
ends with the treatment rather than the withdrawal of treatment
a researcher examines the effect of the speed of involved in a car accident (5mph over, 10 mph over, or 15mph over) and the severity of the damage caused (500, 1500 or 2500 dolars) on judgements of responsibility assigned to the driver. what is the factorial design?
3x3
when comparing the differences in the ratings of friendliness between new doctors (under 5 years of experience) and seasoned doctors (over 20 years of experience), the null hypothesis would suggest that:
there is no diference in the ratings of frendliness between new and seasoned doctors
an educational researcher examines the effect of speaker credibility on attitude change in 4 year university students and comm coll studetnts. the PV in this design is the:
type of student
