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:
idParticipant ID.
waveWave of measurement.
timeWave of measurement centred at time 0.
opposites_naming_scoreScore on the "opposites naming" task.
baseline_cognitive_scoreBaseline 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