Psych 216 Iclicker qs

Moderator

Having a pet makes you more responsible if you have a dog but not a cat. In this example, the type of pet you have is what kind of variable?

Mediator

Success leads to greater confidence, which leads to higher motivation at school. In this example, confidence is an example of what kind of variable?

Third variable

The relationship btw drowning and ice cream consumption exists because of hot weather. In this example, hot weather is an example of what kind of variable?

2

A study wants to know how well students react to unexpected events during their morning commute. The researchers are interested in whether caffeine intake and sleep duration affect reaction time when responding to a simulated traffic event. How many independent variables are in this study?

False

In multiple regression, B/b is the same as Beta

True

Probability sampling is the best way to get a representative sample

False

External validity is most important for association claims

True

Selection effects can occur when experimenters allow participants to choose their own treatment group

Maturation

Spontaneous remission in clinical studies is an example of which of the following threats to internal validity?

A large sample size with less variability

Of the following, which will produce the MOST narrow and precise confidence interval?

Use 2 different measures of motivation at pretest and posttest

Dr. Symona is curious about how motivation changes because of a new counselling program. She is concerned about testing threats in her study. Which of the following actions would you suggest she takes to address this type of threat?

to control for observer bias

what could be the reason an experimenter might decide to conduct a double-blind study?