Przeglądaj Polskie Forum Psychologiczne, 2013, Tom 18, Numer 1 według tematu "rejeated measurement"
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A note on the correlation of gain scores and achievement level
(Instytut Psychologii ; Uniwersytet Kazimierza Wielkiego w Bydgoszczy, 2013)The negative correlation between gain score and initial status is one of the classical dilemmas in the measurement of change. A simple but efficient method is proposed to get valid information about the relationship between ...