Artificial data created by Willett (1988) measuring changes in performance on a hypothetical "opposites naming" task over a four week period in a sample of 35 people.
Format
A person-period data frame with 140 rows and 5 columns:
id
Participant ID.
wave
Wave of measurement.
time
Wave of measurement centred at time 0.
opposites_naming_score
Score on the "opposites naming" task.
baseline_cognitive_score
Baseline score on a standardized instrument assessing general cognitive skill.
Source
Willett, J. B. (1988). Questions and answers in the measurement of change. In E. Rothkopf (Ed.), Review of research in education (1988–89) (pp. 345–422). Washington, DC: American Educational Research Association. https://doi.org/10.3102/0091732X015001345