AMCP (version 2.0.0)

chapter_14_table_10: The data used in Chapter 14, Table 10

Description

The data used in Chapter 14, Table 10

Usage

data(chapter_14_table_10)

Format

An object of class data.frame with 20 rows and 4 columns.

Variables

M

participant mean reaction time across the 0, 4, and 8 degree angle conditions

D1

linear trend across angle, 8 degrees minus 0 degrees

D2

quadratic trend across angle, 0 degrees minus twice 4 degrees plus 8 degrees

Group

participant age (young or old)

Synonym

C14T10

Author

Ken Kelley

Details

Table 14.10 presents the M, D1, and D2 transformed scores formed from the three-angle reaction-time data of Table 14.9. For each participant, M is the mean reaction time across the 0-degree, 4-degree, and 8-degree angle conditions; D1 is the linear trend across angle (8 degrees minus 0 degrees); and D2 is the quadratic trend across angle (0 degrees minus twice 4 degrees plus 8 degrees). These transformed variables support the multivariate approach to the design: D1 and D2 are used to test the main effect of angle and the age-by-angle interaction, while M carries the between-subjects information used to test the main effect of age. The young-participant means are M = 569, D1 = 168, and D2 = -48; the old-participant means are M = 663, D1 = 249, and D2 = 27; and the grand means are M = 616, D1 = 208.5, and D2 = -10.5.

References

Maxwell, S. E., Delaney, H. D., & Kelley, K. (2027). Designing experiments and analyzing data: A model comparison perspective (4th ed.). New York, NY: Routledge.

Examples

# Load the data
data(chapter_14_table_10)

# Or, alternatively load the data as
data(C14T10)

# View the structure
str(chapter_14_table_10)