ex2120 {Sleuth3}

Clever Hans Effect

Description

These data were simulated to match the summary statistics and conclusions of Rosenthal and Fode's Clever Hans experiment. Each of 12 students trained rats to run a maze. The data set contains their number of successful runs out of 50 on each of 5 days, the student's prior expectation of success (on a scale from -10 to 10), and a variable indicating treatment–whether or not the students were supplied with the fictitious information that their rights were bright.

Usage

2120

Format

A data frame with 60 observations on the following 5 variables.

Student

a student identification number

PriorExp

the student's prior expectation of rat-training success, on a scale from -10 to 10

Treatment

a factor with levels "bright" and "dull" corresponding to whether students were told (falsely) that their rats were bright or not

Day

day of the study, ranging from 1 to 5

Success

the number of successful maze runs on a day, out of 50

Source

Ramsey, F.L. and Schafer, D.W. (2013). The Statistical Sleuth: A Course in Methods of Data Analysis (3rd ed), Cengage Learning.

References

Rosenthal, R. and Fode, K.L. (1963) The Effect of Experimenter Bias on the Performance of the Albino Rat Behavioral Science 8:3: 183–189.

See Also

ex1419

Examples

                 
str(ex2120)