case1601 {Sleuth2}R Documentation

Sites of Short- and Long-Term Memory

Description

Researchers taught 18 monkeys to distinguish each of 100 pairs of objects, 20 pairs each at 16, 12, 8, 4, and 2 weeks prior to a treatment. After this training, they blocked access to the hippocampal formation in 11 of the monkeys. All monkeys were then tested on their ability to distinguish the objects. The five-dimensional response for each monkey is the number of correct objects distinguished among those taught at 16, 12, 8, 4, and 2 weeks prior to treatment.

Usage

case1601

Format

A data frame with 18 observations on the following 7 variables.

Monkey
Monkey name
Treatment
a treatment factor with levels "Control" and "Treated"
Week2
percentage of 20 objects taught 2 weeks prior to treatment that were correctly distinguished in the test
Week4
percentage of 20 objects taught 4 weeks prior to treatment that were correctly distinguished in the test
Week8
percentage of 20 objects taught 8 weeks prior to treatment that were correctly distinguished in the test
Week12
percentage of 20 objects taught 12 weeks prior to treatment that were correctly distinguished in the test
Week16
percentage of 20 objects taught 16 weeks prior to treatment that were correctly distinguished in the test

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

Sola-Morgan, S. M. and Squire, L. R. (1990). The Primate Hippocampal Formation: Evidence for a Time-limited Role in Memory Storage, Science 250: 288–290.

Examples

str(case1601)

# short-term response
short <- with(case1601, (Week2 + Week4)/2)
# long-term response
long <- with(case1601, (Week8 + Week12 + Week16)/3)
# Multivariate analysis of variance
mfit <- manova(cbind(short,long) ~ Treatment, case1601) 
summary(mfit)

[Package Sleuth2 version 1.0-1 Index]