Question: When you compute difference scores (for a paired samples t test), what happens to the parts of scores that are associated with stable individual differences

When you compute difference scores (for a paired samples t test), what happens to the parts of scores that are associated with stable individual differences among persons? (In the models in this chapter, these parts of scores were denoted pi.) For example, in the study about stress and HR, after difference scores are computed, is there any variance among the difference scores that is due to individual differences in HR?

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