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. 2023 Jun 12;15:1124731. doi: 10.3389/fnagi.2023.1124731

Table 2.

Variables selected for analysis, conceptual detail.

Name Description
Direct
Total recall The sum of correct words recalled on trial 1, 2, and 3.
Short-delayed recall The number of correct words on trial 4.
Long-delayed recall The number of correct words on trial 5.
Recognition discrimination index (RDI) the number of true positives minus the number of false positives in the recognition trial.
Derived
Short-delayed recall percent retained (SDR percent retained) The number of words recalled in trial 4 divided by the higher of trials 2 or 3.
Long-delayed recall percent retained (LDR percent retained) The number of words recalled in trial 5 divided by the higher of trials 2 or 3.
Semantic clustering (Stricker et al., 2002) The number of times a correctly recalled word was followed by another correctly recalled word appearing in the same semantic feature was divided by the number of correct recalled per trial.
Serial clustering (Stricker et al., 2002) The number of times a correctly recalled word was followed by another correctly recalled word appearing in the same list order divided by the number of correct recalled per trial.
Perseverations The sum of repetition words recalled on trial 1–5.
Intrusions errors The number of words recalled that were not HVLT-R stimuli on trial 1–5.