. Author manuscript; available in PMC: 2022 Jul 1.

Published in final edited form as: Addiction. 2021 Jan 28;116(7):1689–1699. doi: 10.1111/add.15334

Table 1.

RAVLT measures used and their definitions.

Psychological process	Definition
Overall learning (“learning capacity”)	$\sum_{t = 1}^{5} y_{t}$
Learning over trials (LOT)	$\sum_{t = 1}^{5} y_{t} - 5 y_{1}$
Trial 5 total (“final learning”)	y₅
Attention and immediate memory: Trial 1 total	y₁
Attention and immediate memory: Trial B total	y_B
Proactive interference	y_B−y₁
Immediate retention	y₆−y₅
Delayed retention (after 30 min)	y₇−y₅

Note: y represents the number of words recalled on a given trial, with the subscript indicating which trial (Trials 1–7 or Trial B). The first two measures of learning involve summing the number recalled on the five learning trials, indicated by the summation operator.