Department

PsychologyCourse Code

PSY202H1Professor

AmandaLecture

4This

**preview**shows half of the first page. to view the full**2 pages of the document.**Does amount of sleep (4 hours vs 8 hours) influence test performance for older, but not

younger, adults? All data were collected in a single day.

There are 2 variables:

Hours of sleeps

Age of adults

Because all the data were collected in a single day, therefore there are different participants in

each group, it has to be between subjects.

ANS:

-Factorial independent-measures ANOVA

Do students perform better the second time they do a task than the first time they do a task,

but only if the task is easy, and not difficult? Participants perform either an easy or difficult

task.

Variables:

Difficult task or easy task

Factorial mixed design ANOVA

(mixed means that there are both independent and repeated I the study)

Is there a difference in test performance between high school students who study for less than

5 hours, between 5-10 hours, and more than 10 hours?

One-way independent-measures ANOVA

Do young adults prefer coffee over doughnuts in the morning, but doughnuts over coffee in the

evening? Participants are given a coffee and doughnut one morning and are given a coffee and

doughnut the following evening.

Type of food, and timing are the 2 variables.

Factorial repeated-measures ANOVA

Correlation

Allows us to measure and describe the relationship between 2 continuous variables.

The more consistent relationship the larger the number is like -0.8. no matter if it is positive or

negative.

Transforming the data

If we add or subtract every X or Y to a number, it will just shift the graph instead of changing

the shape of the data.

But when we are multiplying or divide X or Y with negative number, it will be changing the

correlation.

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