Research Methods- factorial design practice2

Research Methods- factorial design practice2 - A researcher...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
A researcher is interested in the effects of caffeine and amount of sleep on people’s memory. She obtains a total of 100 subjects and randomly assigns an equal number to conditions in the study. The researcher designs a study where subjects are randomly assigned to either sleep 4 hours per night or 8 hours per night for one week prior to the memory task. She also randomly assigns subjects to drink 5 cups of coffee or 5 cups of water in the three hours prior to the memory task. The researcher then brings subjects into her lab and gives them 2 minutes to memorize a list of 25 words. At the end of the two minutes, subjects are asked to recall as many words as possible. a) The researcher obtains the following mean number of words recalled for subject in each condition in her study: Presence of caffeine Yes No Amount of Sleep 4 hours 25 20 8 hours 15 10 Assume all differences in means are statistically significant (via an F-test). Identify all main and interaction effects. MAIN EFFECT: The presence of coffee and 4 hours of
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This homework help was uploaded on 04/15/2008 for the course CO 259 taught by Professor Herbeck during the Fall '08 term at BC.

Page1 / 2

Research Methods- factorial design practice2 - A researcher...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online