If you are constructing a data file for a repeated-measures design with ten subjects and three conditions, how many columns and rows will the file have?
A) Ten columns and four rows
B) Four columns and four rows
C) Ten columns and ten rows
D) Four columns and ten rows

Question

Quizplus · Accepted Answer

Each subject has three measurements (one for each condition), so there are three columns for each subject. Therefore, the total number of columns is 3 x 10 = 30. Each row represents a single measurement for a single subject, so there are 10 rows for each condition, and thus a total of 10 x 3 = 30 rows. Therefore, the data file will have 30 columns and 30 rows, or 4 columns and 10 rows if the data are organized by subject. The best choice is D, which correctly identifies the number of columns and rows in the data file for a repeated-measures design with ten subjects and three conditions.

If You Are Constructing a Data File for a Repeated-Measures